SECTION 7C1 - AUTOMATIC TRANSMISSION (4L30-E)
CAUTION
When fasteners are removed, always reinstall
them at the same location from which they
were removed. If a fastener needs to be
replaced, use the correct part number fastener
for that application. If the correct part number
fastener is not available, a fastener of equal
size and strength (or stronger) may be used.
Fasteners that are not reused, and those
requiring thread locking compound, will be
called out. The correct torque values must be
used when installing fasteners that require
torque. If the above conditions are not
followed, parts or system damage could
result.
General Description 
Construction
Electronic Control Diagram 
Transmission Control Module (TCM) 
Control System Diagram 
Functions of Input/Output Components 
Range Reference Chart
Normal Operation of 4L30-E Transmission
Diagnosis
Introduction
Driver Information
General Diagnosis Procedure 
Preliminary Inspection Chart
Checking Transmission Fluid Level and Condition 
Test Driving 
Mechanical/Hydraulic Diagnosis
Check Trans Indicator Chart
Mechanical/Hydraulic Diagnosis Symptoms Index
Stall Test 
Line Pressure Test
Shift Speed Chart

Lock-up Speed Chart 
Electronic Diagnosis
Check Trans Indicator 
Diagnostic Check
”Check Trans“ Check
Flashing Codes 
TECH2 Connection
Clear DTC
DTC Check
F0 : Data List Quick Check
Chart 1 : Diagnosis Connector and Voltage Supply Test 
Chart 2 : Diagnostic Trouble Code (DTC)
Chart 3 : Transmission and TCM Identification 
Chart 5 : F5 : Actuator Test Quick Check
Without DTC Set
TCM Precautions
Intermittent Conditions
Wiring Diagram 
Connector Location
Connector List

GENERAL DESCRIPTION

The 4L30-E is a 4-speed automatic transmission. It consists primarily of a 4-element torque converter,

an oil pump, two planetary gear sets, 5 multi-plate clutch packs, a brake band, 2 one-way clutches, 2

valve bodies, sensors, actuators and a Transmission Control Module (TCM).

The torque converter acts as a fluid coupling to transmit power from the engine to the, transmission. It

also provides torque multiplication when required and the lock-up function of the pressure plate

eliminates slip by providing a mechanical coupling between the engine and transmission.

The two planetary gear sets, clutches and brake band provide the 4 forward gears and reverse.

Changing of the forward gear ratios is fully automatic – sensors provide input signals to the TCM. The

TCM interprets these signals and actuates the various solenoids inside the transmission. By using

electronics, the TCM controls shift points, shift feel and torque converter clutch operation, to provide the

correct gear ratios for all conditions of vehicle operation.

Control of shift feel is achieved by providing TCM control over a Force Motor, which is a precision

electronic pressure regulator that controls line oil pressure. Electronic pressure regulation provides

excellent shift feel by a precise match between line oil pressure and engine power output.

The TCM provides three transmission-operating modes:

· Normal Mode – normal shift pattern.

· Power Mode – delayed upshift time for maximum acceleration.

The mode of operation is selected by the driver through the Power Switch mounted to the rear of the

centre console.

A third mode, ‘Fail-safe', is provided by the transmission to allow restricted operation in the event of

electrical failure.

CONSTRUCTION

56711

10 234

1. TORQUE CONVERTER-CLUTCH (TCC)

2. FOURTH CLUTCH (C4)

3. OVERRUN CLUTCH (OC)

4. OVERDRIVE UNIT

5. REVERSE CLUTCH (RC)

6. SECOND CLUTCH (C2)

7. THIRD CLUTCH (C3)

8. RAVIGNEAUX PLANETARY GEARSET

9. BRAKE BAND (B)

10. OVERDRIVE FREE WHEEL

(ONE WAY CLUTCH) (OFW)

11. SPRAG FREE WHEEL

(ONE WAY CLUTCH) (PFW)

CROSS SECTION

A07LW004

ELECTRONIC CONTROL DIAGRAM

DRIVER'S INPUT

MANUAL SELECTOR

KICKDOWN SWITCH

BRAKE SWITCH

PUSH BUTTON FOR

NORMAL/POWER

DRIVE MODE

VEHICLE SPEED

SENSOR

ATF TEMPERATURE

SENSOR

MODE SWITCH

PRND32L

5 SOLENOID

VALVES

BATTERY

+12

IGNITION

TRANSMISSION

CONTROL

MODULE

(TCM)

COMPENSATION FOR ENGINE LOAD

AIR CONDITIONING SWITCH

ON-BOARD DIAGNOSTIC

ENGINE CONTROL

MODULE(ECM)

THROTTLE POSITION

SENSOR

CRANK ANGLE SENSOR

ENGINE COOLANT

TEMPERATURE SENSOR

DASH BOARD DISPLAY

POWER DRIVE MODE

LAMP

SHIFT INDICATOR LAMP

A/T SHIFT INDICATOR

CONTROL UNIT

(

CHECK TRANS LAMP

C07LW003

TRANSMISSION CONTROL MODULE (TCM)

C07LW002

ENGINE

VEHICLE

TPS

4L30-E

IGN

A8 A4 C1 D1

IGN

IGN BATT GND

D14

C14

A12

B12

B11

C12

C15

C16

TCM

C10

OUT

MODE SW A

MODE SW B

MODE SW C

MODE SW G

OIL TEMP

OUTPUT SPEED HI

OUTPUT SPEED LO

TCC HI

SHIFT SOL. HI

SHIFT SOL. A

SHIFT SOL. B

BAND APPLY SOL.

FORCE MOTOR HI

FORCE MOTOR LO

BRAKE SW

A/C REQUEST

POWER SW

KICKDOWN SW

CHECK TRANS LAMP

POWER LAMP

–

ECM:

TPS:

TCC:

Engine Control Module

Throttle Position Sensor

Torque Converter Clutch

D16 DIAG SW

CRANK

ANGLE

SENSOR

ECM D12

ENGINE

SPEED

SERIAL DATA

TORQUE

MANAGEMENT

ENGINE

COOLANT

TEMP SW

CONTROL SYSTEM DIAGRAM

AUTOMATIC TRANSMISSION ASSEMBLY

ENGINE

LOCKUP PISTON

TORQUE

CONVERTER

INPUT SHAFT

PLANETARY GEAR

MULTIPLATE CLUTCH

MULTIPLATE BRAKE

BRAKE BAND

ONE WAY CLUTCH

OUTPUT SHAFT

TIRE

FINAL DRIVE GEAR

DRIVE SHAFT

OIL PUMP SERVO MECHANISM

CONTROL VALVE

:POWER

TRANSMIT

:OIL PRESSURE

CONTROL

:MECHANICAL

SIGNAL

:ELECTRONIC

SIGNAL

OIL TEMP.

SENSOR

TORQUE CONVERTER

CLUTCH SOLENOID

SHIFT SOLENOID A

SHIFT SOLENOID B

BAND APPLY

SOLENOID

FORCE MOTOR

MANUAL VALVE

VEHICLE SPEED

SENSOR

MODE

SWITCH

CHECK TRANS LAMP

POWER LAMP

KICKDOWN SWITCH

BRAKE SWITCH

POWER MODE SWITCH

AIR CONDITIONING

SWITCH

TRANSMISSION CONTROL

MODULE (TCM)

• SHIFT CONTROL

• BAND APPLY CONTROL

• TORQUE CONVERTER CLUTCH

CONTROL

• LINE PRESSURE CONTROL

• SAFETY MODE

• ON-BOARD DIAGNOSTIC

SYSTEM

• TORQUE MANAGEMENT

SHIFT INDICATOR LAMP

A/T SHIFT INDICATOR

CONTROL UNIT

(

CRANK ANGLE SENSOR

THROTTLE POSITION

SENSOR

ENGINE COOLANT

TEMPERATURE SENSOR

ECM

C07LW001

Shift Control

The 4L30E transmission uses two electronic shift

solenoids to control upshift and downshift points in all

forward gear ranges. These shift solenoids operate

together in a combination of ‘OFF’ and ‘ON’ sequences

to control the position of the 1-2/3-4 and 2-3 shift valves.

The Transmission Control Module (TCM) monitors the

numerous input signals to determine the solenoid status

required for the current vehicle operating conditions.

The shift solenoids are ’Low-side Driven’, that is, the

TCM provides the ground path to energise the solenoid.

Band Apply Control

The Band Apply Solenoid is a normally open solenoid

valve located on the rear of the main valve body. The

solenoid controls the rate of brake band apply and

release in response to a Pulse Width Modulated (PWM)

signal from the TCM by regulating the flow of oil to and

from the band servo.

Varying the rate of band apply and release reduces low

speed shift-shock and provides a measure of engine

poverrun protection on a 3-2 downshift.

Torque Converter Clutch Control

The Torque Converter Clutch (TCC) solenoid is a

normally open solenoid valve, located in the Adapter

Case valve body. When the solenoid is de-energised,

the TCC is released. Energising the solenoid allows

fluid fluid pressure to move the TCC Control Valve into

the apply position, initiating TCC apply.

The TCC is normally applied in 3rd and 4th gear,

although it may apply in 2nd gear during a downshift, or

as part of the transmission ‘overheat’ strategy.

Line Pressure Control

Line pressure varies in response to the operation of the

Force Motor. The Force Motor (or Pressure Control

Solenoid) is a precision electronic pressure regulator

valve, controlled by a 600Mz PWM signal from the

TCM. The Force Motor regulates the flow of Feed Limit

fluid into the Throttle Signal pressure circuit, hence Line

Oil pressure.

Force Motor duty cycle and Line Oil pressure are

inversely proportional. That is, as duty cycle (current

flow) decreases, Line Oil pressure increases.

Under normal operating conditions - between minimum

and maximum throttle, the TCM will vary the duty cycle

signal Force Motor duty cycle signal between 60% and

0%.

In the event of electrical system failure, the current flow

to the Force Motor will 0.0 amps. This creates maximum

Line Oil pressure to prevent any apply components from

slipping until the condition can be corrected.

On–Board Diagnostic System

The TCM has a built-in diagnostic system that

recognises and identifies possible transmission

operational issues and alerts the driver by flashing the

CHECK TRANS lamp mounted in the instrument panel.

Below the RH edge of the instrument panel is the J1962

Diagnositc Link Connector (DLC). The DLC allows

access to the diagnostic system with the TECH 2 scan

tool for both active testing and Diagnostic Trouble Code

(DTC) retrieval.

Fail Safe Mechanism

Should a major electrical system failure occur which

may either adversly affect vehicle safety or damage the

transmission, the transmission will enter ‘Fail-saf’e or

‘Default’ mode.

In this mode, the transmission operates with both shift

solenoids, the TCC solenoid and the Force Motor

turned OFF. The driver maintains some manual control

over gear selection, but with some shift-shock during

selection and harsh garage shifts.

Torque Management Control

The 4L30E transmisssion utilises a ‘Torque

Management’ system to improve transmission

component durability and shift quality under medium to

full throttle operation.

Provididng a means to occur to reduce engine torque

during the shift-overlap period reduces the stress on

bands and clutches while improving the shift ‘feel’. The

process of limiting engine torque during shiting is called

Toque Management. The technique calls for a

momentary reduction (or retardation) of the spark

advance and may effectively retard the ignition timing to

0º TDC.

ATF Warning Control

The ATF warning lamp will illuminate when transmission

fluid temperature exceeds 145ºC and will extinguish

when the fluid temperature falls below 125ºC.

ABS Control (If equipped)

When the select lever is at “L” or “R” range, a signal is

sent to the ABS Modulator, resulting in a recalibration of

the ABS operation to suit the current operating

conditions.

SHIFT MODE CONTROL

1Mode type

Mode type Select lever position

Normal drive mode (NOR) Entire range (excluding “R”)

Power drive mode (PWR) Entire range (excluding “R”)

2Mode selection

SWITCH (SW) LAMP

Mode type

PWR/NOR. SW POWER DRIVE LAMP

Normal drive mode (NOR)

OFF OFF

Power drive mode (PWR)

ON ON

3Comparison of mode

(1) The normal drive mode is set at the normal shift points.

(2) The shift points of the power drive mode are shifted to the higher speed side, compared to the

normal drive mode.

Shift diagram

N: Normal drive mode

P: Power drive mode

Amount of

throttle

opening

Speed mph(km/h)

NPP

GEAR SHIFT CONTROL

1Shift pattern

2Gear position

The gear is selected by ON/OFF of two solenoids.

3Selecting gear position

Seven types of positions can be selected according to 5 signals from the mode switch as shown

below.

SELECT LEVER RANGE SHIFT PATTERN

D (Drive) 1 2TCC 3TCC 4TCC

3 (Third) 1 2TCC 3TCC 4TCC

2 (Second) 1 2TCC 3TCC

L (First) 1 2

→

←→

←

→

←

→

←

→

←

→

←

TCC = Torque Converter Clutch

GEAR SOL AB

4 (Fourth) ✕✕

3 (Third) ●●✕

2 (Second) ●●●●

1 (First) ✕●●

P (Park)

R (Reverse) ✕●●

N (Neutral)

●●= ON

✕= OFF

SOLENOID A ON →PRESSURE TO

(Normally closed) SHIFT VALVE

SOLENOID B OFF →PRESSURE TO

(Normally open) SHIFT VALVE

MODE SW TERMINALS

SELECT LEVER RANGE 5(D) 8(A) 7(B) 6(C) 3(G)

P (Park) •• •

R (Reverse) •••

N (Neutral) •••

D (Drive) •••

3 (Third) •••••

2 (Second) •• •

L (First) •••

•= Continuity

BACKUP MODE

If a major system failure occurs which could affect safety or damage the transmission under normal

vehicle operation, the diagnostic system detects the fault and overrides the TCM.

The “CHECK TRANS” light flashes to alert the driver, and the transmission must be manually shifted

as follows:

Select lever position Gear Ratio Selected

D 4 (Fourth)

Manual 3 4 (Fourth)

Manual 2 3 (Third)

Manual L 1 (First)

R Reverse

Shifts are firmer to prevent clutch slip and consequent wear. The fault should be corrected as soon as

possible.

FUNCTIONS OF INPUT/OUTPUT COMPONENTS

Components Function

Speed sensor Senses rotation of output shaft and feeds the data to Transmission

(fixed to transmission T/M) Control Module (TCM)

Throttle Senses the extent of throttle valve opening and the speed of the throttle

position sensor (TPS) valve lever motion to open the valve and feeds the data to TCM (fed to

(fixed to engine) Engine Control Module (ECM) also)

Brake Switch (SW) Senses whether the driver has pressed the brake pedal or not and feeds

(fixed to brake pedal) the information to TCM

Kick-down SW (fixed to Senses whether the driver has pushed the accelerator pedal fully or not

accelerator pedal) and feeds the information to TCM

Mode SW (fixed to T/M) Senses the select lever position and feeds the information to TCM

Power drive SW Senses whether the driver has selected the power mode and feeds the

(fixed to front console) information to TCM

T/M oil temp. sensor Senses the T/M oil temperature and feeds the data to TCM

Engine coolant Senses the engine cooling water temperature and feeds the data to TCM

temperature SW (feeds the signal from ECM)

Engine speed signal Feeds the signals monitoring engine speed to TCM from crank angle sensor

(feeds the signal from ECM)

Air conditioning Senses whether the air conditioner has been switched on or not and

information feeds the information to TCM

On-board diagnostic input By monitoring the Ground (GND), the location of failure is shown on the

T/M monitor lamp (“CHECK TRANS”) by flashing the diagnostic trouble

code

Shift solenoid A, B Selects shift point and gear position suited to the vehicle running con-

dition on the basis of TCM output

Band apply solenoid Controls oil flow suited to the vehicle running condition on the basis of

TCM output

Torque Converter Controls clutch engagement/disengagement suited to the vehicle

Clutch solenoid running condition on the basis of TCM output

Force motor Adjusts the oil pump delivery pressure to line pressure suited to the

(Pressure regulator vehicle running condition on the basis TCM output

valve)

Power drive mode lamp Informs the driver whether the vehicle is in power mode or not

T/M monitor lamp Informs the driver of failure in the system. It also displays the self diag-

(“CHECK TRANS”) nosis code.

Data Link Connector (DLC) When connected with TECH2 or tester, can communicate the data for

function check, etc. (fed to ECM also). When TECH2 is not connected,

can communicate the signal for torque management with ECM.

When short-circuited with the bipolar connector, the T/M monitor lamp

displays a failure by code.

RANGE REFERENCE CHART

1-2/3-4

2-3 O/DRIVE OVERRUN FOURTH THIRD REVERSE SECOND PRINCIPLE BAND

RANGE GEAR SOL SOL ROLLER CLUTCH CLUTCH CLUTCH CLUTCH CLUTCH SPRAG

ASSEMBLY

ENGINE

N.C. N.O. CLUTCH (OC) (C4) (C3) (RC) (C2)

ASSEMBLY

(B) BRAKING

(OFW) (PFW)

P-N OFF ON APPLIED NO

RREVERSE OFF ON LD APPLIED APPLIED LD NO

1ST OFF ON LD APPLIED LD APPLIED NO

2ND ON ON LD APPLIED APPLIED FW APPLIED YES

D3RD ON OFF LD APPLIED APPLIED APPLIED NE YES

4TH OFF OFF FW APPLIED APPLIED APPLIED NE YES

1ST OFF ON LD APPLIED LD APPLIED NO

32ND ON ON LD APPLIED APPLIED FW APPLIED YES

3RD ON OFF LD APPLIED APPLIED APPLIED NE YES

1ST OFF ON LD APPLIED APPLIED LD APPLIED YES

22ND ON ON LD APPLIED APPLIED FW APPLIED YES

L1ST OFF ON LD APPLIED APPLIED LD APPLIED YES

LD : LOCKED IN DRIVE FW : FREEWHEELING NE : NOT EFFECTIVE

C07RT010

NORMAL OPERATION OF 4L30-E

TRANSMISSION

1. TORQUE CONVERTER CLUTCH (TCC)

APPLICATION CONDITIONS:

The TCC is normally applied in 2nd, 3rd and 4th

gears only when all of the following conditions

exist:

ÐThe engine coolant temperature is above 70º C

(158ºF).

Ð The brake pedal is released.

Ð The shift pattern requests TCC apply.

Moreover, TCC is always applied in 2nd, 3rd and

4th gears when the transmission oil temperature is

above 135º C (275º F).

This mode should be canceled at 125ºC (257ºF).

2. SPECIAL SHIFT P ATTERN WHEN THE

ENGINE IS COLD:

The TCM inhibits TCC apply and delays transmission

upshifts until engine coolant temperature rises above

70ºC.

DIAGNOSIS

INTRODUCTION

The systematic trouble shooting information covered by this Section offers a practical and systematic

approach to diagnosing 4L30-E transmission, using information that can be obtained from road tests,

electrical diagnosis, oil pressure checks or noise evaluation.

The key to correcting a complaint is to make use of all of the available symptoms and logically letting them

direct you to the cause.

When dealing with automatic transmission complaints, it is best to gather as many symptoms as possible

before making the decision to remove the transmission from the vehicle.

Frequently, the correction of the cause of the complaint does not require removal of the transmission from

the vehicle.

DRIVER INFORMATION

To analyze the problem fill a complete description of the owner’s complaint.

Please draw a circle around the right information and complete the following form. (Find next page an

example of form completed). You can draw a circle around many numbers if you are not sure.

Example of form completed.

GENERAL DIAGNOSIS PROCEDURE

END

Complaint

PRELIMINARY

INSPECTION

CHART

Remove trans-

mission assembly

and repair/replace

as required

Reinstall

transmission

assembly TEST DRIVING

Flush cooler lines

Perform repair

per

SYMPTOMS CHART

Replace

component

Can

fault

be corrected

by on-car

component

replacement?

Problem

fixed?

YES

PRELIMINARY INSPECTION CHART

Complaint

Check CHART3: TRANSMISSION AND

TCM IDENTIFICATION on page 7A1-64.

Check TRANSMISSION FLUID LEVEL

and CONDITION. See page 00-4.

Check manual linkage.

Verify engine performance. Refer to Engine Section

Road test vehicle to verify concern.

See CHECK TRANS INDICATOR

CHART on page 7A1-25.

See ELECTRONIC DIAGNOSIS

Section of this manual on page 7A1-47.

See page 7A1-23 for TEST DRIVING

Refer to SELECTOR LEVER in this manual.

See page 7A1-145.

System

Note

codes

Does

symptom reflect

NORMAL

OPERATIONS

OF 4L30-E

TRANSMISSION?

(See page 7A1-15)

“CHECK TRANS”

flashing

Any

Trouble Codes

stored by

TCM?

Hydraulic

system appears

OK!

Are any DTC’s

stored in

TCM?

YES

TCM: Transmission Control Module

See MECHANICAL/HYDRAULIC

DIAGNOSIS Section on page 7A1-26.

CHECKING TRANSMISSION FLUID LEVEL

AND CONDITION

Refer to “SERVICING” of the SERVICE INFORMATION

(Section 7C).

Techline

TEST DRIVING

Some 4L30-E automatic transmission complaints

vehicles will require a test drive as a part of the

diagnostic procedure. Some codes will not set

unless the vehicle is moving. The purpose of the

test drive is to duplicate the customer’s complaint

condition and set a current Transmission Control

Module (TCM) trouble code. Perform this procedure

before each 4L30-E automatic transmission repair,

and again after repairs are made.

IMPORTANT:

• Duplicate the condition under which the

customer’s complaint was observed.

• Depending on the complaint, line pressure

gauge and the scan tool may be required

during the test drive.

• During the test drive, it is important to record

all necessary data from the areas being

monitored, for use in diagnosis. Also listen for

and note any unusual noises.

The following procedure should be used to test

drive 4L30-E automatic transmission complaint

vehicles:

1. Turn the ignition ON without starting the

engine. Check that the “CHECK TRANS” lamp

comes on for approximately 2 to 3 seconds

and then goes out and remains out.

• If the lamp is flashing, GOTO CHECK TRANS

INDICATOR.

• If no serial data is present, see Chart 1:

DIAGNOSTIC CONNECTOR AND VOLTAGE

SUPPLY TEST.

• If the lamp stays ON or stays OFF, GOTO

“CHECK TRANS” CHECK.

2. Drive the vehicle. During the test drive be sure

that the transmission achieves normal

operating temperature (approx. 20 minutes).

Allow the transmission to go through all of its

gear ranges, checking shift timing and

firmness. Duplicate the owner’s complaint

condition as closely as possible during the test

drive.

3. If, during the test drive, the “CHECK TRANS”

lamp comes on, use the scan tool to check for

trouble codes.

4. If, during the test drive, a problem is felt, but

the “CHECK TRANS” lamp does not come on

and no trouble codes are present, drive the

vehicle with the TCM disconnected (manually

shifting the vehicle).

• In Manual L, the vehicle operates in first

gear.

• In Manual 2, the vehicle operates in third

gear.

• In Manual 3 or “D”, the vehicle operates in

fourth gear.

If the problem still exists with the TCM

disconnected, refer to the MECHANICAL/

HYDRAULIC DIAGNOSIS in this Section.

5. If no problem has been found at this point,

check all underhood connections that supply

power to the TCM and ignition fuses.

Physically and visually inspect all the TCM

harness connectors for loose or corroded

terminals. Inspect the TCM ground points.

PERFORM PRELIMINARY INSPECTION FIRST!

When the “CHECK TRANS” indicator is flashing, it

indicates that a problem related to the trans-

mission, the Transmission Control Module (TCM),

or the vehicle harness has occurred:

The system is now operating in a “BACKUP MODE”

where the risk of further damaging the transmission

has been reduced. The vehicle may be shifted

manually.

If the initial problem is intermittent or seldom,

switching OFF/ON the engine might allow normal

operation again until the problem re-occurs.

“CHECK TRANS” indicator flashing

Use “CHECK TRANS” CHECK in

Electronic Diagnosis section in this

manual

Refer to appropriate DTC chart in

Electronic Diagnosis section in this

manual.

NO DTC ANY DTC

Read and record the Diagnostic

Trouble Codes (DTC) stored by TCM.

WARNING:

Disconnecting battery or TCM will

result in loss of stored trouble code(s).

BACKUP MODE PATTERN:

- No automatic shifting

- Manual shifting only

- “CHECK TRANS” Flashing

SHIFT LEVER GEAR

POSITION SELECTED

MECHANICAL/HYDRAULIC DIAGNOSIS

CHECK TRANS INDICATOR CHART

MECHANICAL/HYDRAULIC DIAGNOSIS SYMPTOMS INDEX

PERFORM PRELIMINARY INSPECTION FIRST!

CHART SYMPTOMS PAGE

1 NO ENGINE START IN NEUTRAL OR PARK 7C1-27

2 NO FORWARD GEARS IN ANY RANGE/NO REVERSE 7C1-28

3 NO ENGINE BRAKE IN ANY RANGE 7C1-29

4 POOR SHIFTING IN ALL GEARS (ALL HARSH OR ALL SOFT) 7C1-30

5a DELAYS IN DRIVE AND REVERSE 7C1-31

5b DELAYS IN REVERSE ONLY

6 DIAGNOSTIC TROUBLE CODE (DTC) 61 7C1-32

7 HARSH 1-2 SHIFT 7C1-33

8 HARSH 3-4 SHIFT

9a 3-2 DOWNSHIFT COMPLAINT

9b HARSH SHIFT WHEN SHIFTING INTO “D” OR ACCELERATING

FROM STOP 7C1-34

9c COASTDOWN HARSH SHIFT OR CLUNK AT 3-2 DOWNSHIFT

10 INTERMITTENT 4TH TO 2ND GEAR DOWNSHIFT AT STEADY SPEED 7C1-35

11 ENGINE FLARE AT SHIFTING DURING TURNING ONLY 7C1-36

12 ENGINE FLARE DURING 1-2 OR 2-3 SHIFT

13 SHUDDER ONLY DURING TORQUE CONVERTER CLUTCH (TCC) APPLYING 7C1-37

14 POSSIBLE CAUSES OF TRANSMISSION NOISE 7C1-38

15a POSSIBLE CAUSES OF LOW LINE PRESSURE 7C1-39

15b POSSIBLE CAUSES OF HIGH LINE PRESSURE 7C1-40

16 POSSIBLE CAUSES OF TRANSMISSION FLUID LEAKS 7C1-41

NOTE:

Numbers with parenthesis on the following charts refer to Parts List at end of Section 7C2.

YES

NO ENGINE START IN NEUTRAL

When shift lever moved from drive to

neutral mostly in hot condition

NO START IN P

(Any condition)

Replace mode switch (63)

END

Does

engine also not

start in neutral when

shift lever moved from

park to neutral?

Open

in neutral

start circuit of mode

switch (63)

Check

mode switch

(63) setting. Readjust

if necessary.

Problems

fixed?

( ) Refer to Parts List at the end of this Section.

CHART 1: NO ENGINE START IN NEUTRAL OR PARK

PERFORM PRELIMINARY INSPECTION FIRST!

Normal line pressure

Check internal linkage:

– Manual linkage (58) not moving

manual valve (326)

Check for internal mechanical

damage:

– Turbine shaft (506) broken loose

– Overrun roller clutch (516) broken

loose

– Etc.

Low line pressure

Use CHART 15a: POSSIBLE CAUSES

OF LOW LINE PRESSURE on page

7A1-39

Check

line pressure

CHART 2: NO FORWARD GEARS IN ANY RANGE/NO REVERSE

PERFORM PRELIMINARY INSPECTION FIRST!

Refer to Line Pressure chart

(

in this Section.

)

( ) Refer to Parts List at the end of this Section.

Check

line pressure

CHART 3: NO ENGINE BRAKE IN ANY RANGE

PERFORM PRELIMINARY INSPECTION FIRST!

Refer to Line Pressure chart

(

in this Section.

)

( ) Refer to Parts List at the end of this Section.

Low line pressure

Use CHART 15a: POSSIBLE CAUSES

OF LOW LINE PRESSURE on page

7A1-39

Normal line pressure

Check for overrun clutch leaks caused

by:

– Damaged piston lip (513)

– Check ball defective (504)

Check for overrun lockout valve (705)

stuck by foreign material

Check for leaks at turbine shaft (506)

Caused by:

– Teflon seal rings damaged (508)

– Excessive wear of turbine shaft

bearing surfaces

( ) Refer to Parts List at the end of this Section.

CHART 4: POOR SHIFTING IN ALL GEARS (ALL HARSH OR ALL SOFT)

PERFORM PRELIMINARY INSPECTION FIRST!

Check

line pressure

Low line pressure

Use CHART 15a: POSSIBLE CAUSES

OF LOW LINE PRESSURE on page

7A1-39

High line pressure

Use CHART 15b: POSSIBLE CAUSES

OF HIGH LINE PRESSURE on page

7A1-40

Check for these conditions which

could affect clutch apply time:

•Defective band apply solenoid

(323)

•Defective servo or/and

accumulator piston

•Excessive clutch piston travel

Check of possible causes of internal

leaks:

– Cut or damaged sealing ring(s)

– Damaged sealing gasket (s)

– Check ball missing or out of

location in 2nd and 3rd clutch

pistons

Check for causes of burned clutch

plates or band

Refer to Line Pressure chart

(

in this Section.

)

( ) Refer to Parts List at the end of this Section.

CHART 5a: DELAYS IN DRIVE AND REVERSE

PERFORM PRELIMINARY INSPECTION FIRST!

CHART 5b: DELAYS IN REVERSE ONLY

PERFORM PRELIMINARY INSPECTION FIRST!

Check

line pressure

Normal line pressure

More than 3 second delay in drive and

reverse with engine off 1 hour or less

Teflon seals (508) on turbine shaft

damaged

Low line pressure

Use CHART 15a: POSSIBLE CAUSES

OF LOW LINE PRESSURE on page

7A1-39

NOTE: A short delay (less than 3

seconds) when first engaging drive or

reverse after allowing vehicle to sit

overnight is normal.

Refer to Line Pressure chart

(

in this Section.

)

Check

line pressure

Refer to Line Pressure chart

(

in this Section.

)

Normal line pressure

Main case to valve body gasket (88)

damaged

Reverse check ball (85) in valve body

(84) missing or out of location

Low line pressure

Use CHART 15a: POSSIBLE CAUSES

OF LOW LINE PRESSURE on page

7A1-39

Check for restrictions at valve body

transfer plate orifice

CHART 6: DIAGNOSTIC TROUBLE CODE (DTC) 61

PERFORM PRELIMINARY INSPECTION FIRST!

DTC 61 sets.

Check line

pressure

Check

3rd gear in “D”

in winter mode.

Does vehicle

move?

Check for suspected conditions

modifying delays to clutch apply:

– Overrun clutch seal damaged

– Excessive overrun clutch piston

travel

– Defective 3-4 accumulator piston

– Causes of internal leaks

– Causes of burned clutch plates

Low line pressure

Use CHART 15a: POSSIBLE CAUSES

OF LOW LINE PRESSURE on page

7A1-39

Refer to Line Pressure chart

(

in this Section.

)

Normal line pressure

1st and 4th gear missing

or 2nd and 3rd gear

missing

Shift solenoid A stuck.

Replace shift solenoid A.

1st and 2nd gear missing

or 3rd and 4th gear

missing

Check appropriate shift

valve

If OK replace solenoid

DTC 61 is set in “D” range

1st gear above 3500 rpm

Check for suspected conditions

modifying delays to clutch apply:

– 2nd clutch seal damaged

– Excessive 2nd clutch piston travel

– Defective accumulator piston

– Causes of internal leaks

– Check ball missing or out of

location in 2nd clutch

– Seals cut, damaged or missing

– Gaskets defective

– Causes of burned clutch plates

DTC 61 is set in “D” range

3rd gear between 55-80

mph *

Check for suspected conditions

modifying delays to clutch apply:

– 4th clutch seal damaged

– Excessive 4th clutch piston travel

– Defective 3-4 accumulator piston

– Causes of internal leaks

– Causes of burned clutch plates

No engine brake in any

range

(All ranges in Drive &

Reverse are OK)

YES

* Perform this test within safe and legal limits.

CHART 7: HARSH 1-2 SHIFT

PERFORM PRELIMINARY INSPECTION FIRST!

CHART 8: HARSH 3-4 SHIFT

PERFORM PRELIMINARY INSPECTION FIRST!

( ) Refer to Parts List at the end of this Section.

Check

line pressure

Refer to Line Pressure chart

(

in this Section.

)

Normal line pressure

Check for 1-2 accumulator valve (320)

stuck by foreign material in main case

valve body

Use CHART 15b: POSSIBLE CAUSES

OF HIGH LINE PRESSURE on page

7A1-40

High line pressure

Check

line pressure

Refer to Line Pressure chart

(

in this Section.

)

Normal line pressure

Check for 3-4 accumulator valve (407)

stuck in adapter case valve body (401) Use CHART 15b: POSSIBLE CAUSES

OF HIGH LINE PRESSURE on page

7A1-40

High line pressure

Check for 3-4 accumulator piston (18)

stuck in adapter case (20)

CHART 9a: 3-2 DOWNSHIFT COMPLAINT

PERFORM PRELIMINARY INSPECTION FIRST!

CHART 9b: HARSH SHIFT WHEN SHIFTING INTO "D" OR ACCELERATING FROM STOP

PERFORM PRELIMINARY INSPECTION FIRST!

CHART 9c: COASTDOWN HARSH SHIFT OR CLUNK AT 3-2 DOWNSHIFT

PERFORM PRELIMINARY INSPECTION FIRST!

( ) Refer to Parts List at the end of this Section.

Check

line pressure

Refer to Line Pressure chart

(

in this Section.

)

Normal line pressure

Replace band apply solenoid (PWM)

(323) Use CHART 15a: POSSIBLE CAUSES OF

LOW LINE PRESSURE on page 7A1-39

Low line pressure

Check

line pressure

Refer to Line Pressure chart

(

in this Section.

)

Normal line pressure

Replace band apply solenoid (PWM)

(323) Use CHART 15b: POSSIBLE CAUSES OF

HIGH LINE PRESSURE on page 7A1-40

High line pressure

Check

line pressure

Refer to Line Pressure chart

(

in this Section.

)

Normal line pressure

Replace band apply solenoid (PWM)

(323) Use CHART 15b: POSSIBLE CAUSES OF

HIGH LINE PRESSURE on page 7A1-40

High line pressure

CHART 10: INTERMITTENT 4TH TO 2ND GEAR DOWNSHIFT AT STEADY SPEED

PERFORM PRELIMINARY INSPECTION FIRST!

Check for

consistent speed

sensor reading

with TECH2

Check for wiring harness damage

or short to ground

Check transmission speed sensor

connections

Replace transmission speed

sensor

NOT OK

Replace mode switch for intermittent

contact

CHART 11: ENGINE FLARE AT SHIFTING DURING TURNING ONLY

(USUALLY WITH WARM ENGINE)

PERFORM PRELIMINARY INSPECTION FIRST!

CHART 12: ENGINE FLARE DURING 1-2 OR 2-3 SHIFT

Check

line pressure

( ) Refer to Parts List at the end of this Section.

Leak at transmission oil filter, gasket,

or wrong filter type

Replace transmission oil filter and

gasket

Check for band apply solenoid (323)

stuck

Check for servo piston (106) leaks

Check for 1-2 accumulator valve (320)

stuck

Normal line pressure

Use CHART 15a: POSSIBLE CAUSES OF

LOW LINE PRESSURE on page 7A1-39

Low line pressure

Refer to Line Pressure chart

(

in this Section.

)

CHART 13: SHUDDER ONLY DURING TORQUE CONVERTER CLUTCH (TCC) APPLYING

PERFORM PRELIMINARY INSPECTION FIRST!

YES

Replace transmission fluid and filter (remove both pans) and flush

cooler lines.

Replace converter assembly and O-ring on turbine shaft.

Drive until whole drivetrain is at normal operating temperature.

– Shudder is a SHORT BURST OF NOISE NORMALLY LESS THAN 1

SECOND IN DURATION, and can be induced by the following

maneuver:

TCC shudder is one of the most commonly misdiagnosed conditions in

an automatic transmission. The key to diagnosing TCC shudder is to

note when it happens and under what conditions. Once the TCC has

been fully applied, it is nearly impossible to make it shudder. TCC

shudder (short burst of noise normally less than 1 second) will only

occur during clutch applying. It is not a steady state condition.

From coast condition at 50 mph in “D” range (Normal mode), depress

the throttle to 1/4-1/3 throttle.

If present, shudder (short burst of noise normally less than 1 sec.) will

occur within 5 seconds together with TCC applying.

(TECH2 may be used to determine the exact time of TCC applying)

Perform mechanical inspection of

other drivetrain components.

CHART 14: POSSIBLE CAUSES OF TRANSMISSION NOISE

PERFORM PRELIMINARY INSPECTION FIRST!

CAUTION:

Before checking transmission for what is believed to be transmission noise,

ensure presence and positioning of insulating plugs, pads etc. Also make

sure that noise does not come from other drivetrain components.

1. WHINE OR BUZZ:

– Oil level low

– Plugged or restricted oil filter

– Damaged oil filter gasket

2. KNOCKING NOISE FROM FRONT OF TRANSMISSION:

– Loose bolts (Converter to flex plate)

– Cracked or broken flex plate

– Converter damaged

3. KNOCKING NOISE WHILE DRIVING - MOSTLY ON ACCELERATION:

– Transmission mount loose or broken

– Cooler line mounts loose or broken

– Cooler lines touching body or frame

4. KNOCKING NOISE WHEN VEHICLE IS STATIONARY:

– Loose flex plate mounting bolts

– Cracked or broken flex plate

– Damaged converter

CHART 15a: POSSIBLE CAUSES OF LOW LINE PRESSURE

ON-VEHICLE SERVICE

TRANSMISSION REMOVED

Small

valve

body

Oil

pump





















( ) Refer to Parts List at the end of this Section.

Check for loose bolts (4 & 5)

Check for pressure regulator valve (208) stuck

Check for boost valve (205) stuck

Check for intermediate oil passages to pressure regulator valve blocked

Check for defective oil pump (9, 201, 202 & 209)

Check for internal leaks

– Check balls missing or out of location in valve bodies

– Seals cut or damaged

– Gaskets defective, etc.

Check oil level

Check for defective throttle position sensor

Check for plugged, loose, or damaged oil filter (79)

Check for force motor plunger (404) stuck. (Remove force motor. Shake and listen for rattle.)

Check for feed limit valve (412) stuck

CHART 15b: POSSIBLE CAUSES OF HIGH LINE PRESSURE

PERFORM PRELIMINARY INSPECTION FIRST!

ON-VEHICLE SERVICE

TRANSMISSION REMOVED

Small

valve

body

Oil

pump





















( ) Refer to Parts List at the end of this Section.

NOTE: If transmission is operating in back-up mode, high line pressure will be

present.

Check for defective throttle position sensor

Check for loose bolts (4 & 5)

Check for pressure regulator valve (208) stuck

Check for boost valve (205) stuck

Check for force motor plunger (404) stuck

(Remove force motor. Shake and listen for rattle.)

(Open circuit/Intermittent)

Check for feed limit valve (412) stuck

Check for internal leaks

– Check balls missing or out of location in valve bodies

– Seals cut or missing

– Gaskets defective, etc.

CHART 16: POSSIBLE CAUSES OF TRANSMISSION FLUID LEAKS

Before attempting to correct an oil leak, the actual source of the leak must be determined. In many cases,

the source of the leak may be difficult to determine due to “wind flow” around the engine and

transmission.

The suspected area should be wiped clean of all oil before inspecting for the source of the leak.

Oil leaks around the engine and transmission are generally carried toward the rear of the car by the air

stream. In determining the source of an leak, the following two checks should be made:

1. With the engine running, check for external line pressure leaks.

2. With the engine off, check for oil leaks due to the raised oil level caused by drainback of converter oil

into the transmission.

POSSIBLE CAUSES OF FLUID LEAKS

DUE TO SEALING MALFUNCTION

1) Electrical connector (Main case) seal

2) Transmission vent (Breather)

3) Speed sensor O-ring

4) Extension (Adapter) lip seal

5) Extension (Adapter) to main case gasket

6) Oil drain plug gasket

7) Oil pan gasket (Main case)

8) Selector shaft seal

9) Oil cooler connectors (2)

10) Oil pan gasket (Adapter case)

11) Converter housing attaching bolts not correctly

torqued

12) Converter housing lip seal

13) Line pressure tap plug

14) Electrical connector (Adapter case) seal

15) Adapter case seal rings (2)

67 5910 8

1413

240LW004

STALL TEST

The stall test allows you to check the transmission for

internal abrasion and the oneway clutch for slippage.

Torque converter performance can also be evaluated.

The stall test results together with the road test results will

identify transmission components requiring servicing or

adjustment.

Stall Test Procedure:

1. Check the level of the engine coolant, the engine oil,

and the automatic transmission fluid.

Replenish if necessary.

2. Block the wheels and set the parking brake.

3. Connect a tachometer to the engine.

4. Start the engine and allow it to idle until the engine

coolant temperature reaches 70 - 80°C (158 - 176°F).

5. Hold the brake pedal down as far as it will go.

6. Place the selector in the “D” range.

7. Gradually push the accelerator pedal to the floor.

The throttle valve will be fully open.

Note the engine speed at which the tachometer

needle stabilizes.

Stall Speed

Standard

2200 ± 150 rpm

NOTE:

Do not continuously run this test longer than 5

seconds.

8. Release the accelerator pedal.

9. Place the selector in the “N” range.

10. Run the engine at 1,200 rpm for one minute.

This will cool the transmission fluid.

11. Repeat Steps 7-10 for the “3”, “2”, “L” and “R”

ranges.

LINE PRESSURE TEST

The line pressure test checks oil pump and control valve

pressure regulator valve function. It will also detect oil

leakage.

Line Pressure Test Procedure:

1. Check the level of the engine coolant, the engine oil,

and the automatic transmission fluid.

Replenish if required.

2. Block the wheels and set the parking brake.

3. Remove the pressure detection plug at the left side of

the transmission case.

Set pressure gauge, adapter to the pressure detection

plug hole.

Gauge and adapter: 5-8840-0004-0 (J-21867)

Line Pressure and Force Motor Current KPa (kg/cm2/ PSI)

4. Start the engine and allow it to idle until the engine

coolant temperature reaches 70 - 80°C (158- 176°F).

5. Hold the brake pedal down as far as it will go.

6. Place the selector in the “D” range.

7. Note the pressure gauge reading with the engine

idling.

8. Gradually push the accelerator pedal to the floor. The

throttle valve will be fully open.

Note the pressure gauge reading with the accelerator

pedal fully depressed.

NOTE:

Do not continuously run this test longer than 5

seconds.

9. Release the accelerator pedal.

10. Place the selector in the “N” range.

11. Run the engine at 1,200 rpm for one minute.

This will cool the transmission fluid.

12. Repeat Steps 7 - 11 for the “3”, “2”, “L”, and “R”

ranges.

13. Install a pressure detection plug to the transmission

case, applying recommended thread locking agent

(LOCTITE 242) or its equivalent to thread of plug.

Make sure that thread is cleaned before applying

locking agents.

14. Tighten the pressure detection plug to the specified

torque.

Pressure Detection Plug Torque N·m (kg·m / lb·ft)

9 – 14 (0.9 – 1.4 / 7 – 10)

LEVER ENGINE FORCE

MODE LINE PRESSURE MOTOR

POSITION SPEED CURRENT

NORMAL/POWER D, 3, 2, L IDLE 312 – 363 (3.2 – 3.7 / 45.2 – 52.6) VARIABLE

NORMAL/POWER REVERSE IDLE 419 – 486 (4.3 – 5.0 / 60.7 – 70.5) 0.9 – 1.0A

NORMAL/POWER D, 3, 2, L STALL SPEED 1236 – 1320 (12.6 – 13.5 / 179.3 – 191.4) 0.1 – 0.2A

NORMAL/POWER REVERSE STALL SPEED 1634 – 1743 (16.7 – 17.8 / 236.9 – 252.8) 0.1 – 0.2A

SHIFT SPEED CHART Transfer gear ratio: High: 1.000

(

Rear axle ratio: 4.555

)

“Normal mode”

Downshift Km/h (mph)

Upshift Km/h (mph)

Range Throttle opening 1 →22 →33 →4

(First Gear) (Second Gear) (Second Gear) (Third Gear) (Third Gear) (Fourth Gear)

DFully opened 41 ~ 47 (25 ~ 29) 84 ~ 90 (52 ~ 56) 127 ~ 133 (79 ~ 83)

(Drive) Half throttle 33 ~ 39 (20 ~ 24) 60 ~ 66 (37 ~ 41) 117 ~ 123 (73 ~ 76)

3Fully opened 49 ~ 55 (30 ~ 34) 99 ~ 105 (62 ~ 66) –

(Third) Half throttle 32 ~ 38 (20 ~ 24) 58 ~ 64 (36 ~ 40) –

2Fully opened 49 ~ 55 (30 ~ 34) – –

(Second) Half throttle 32 ~ 38 (20 ~ 24) – –

Range Throttle opening 1 ←22 ←33 ←4

(First Gear) (Second Gear) (Second Gear) (Third Gear) (Third Gear) (Fourth Gear)

DFully opened 16 ~ 22 (10 ~ 14) 62 ~ 68 (39 ~ 42) 104 ~ 110 (65 ~ 68)

(Drive) Half throttle 15 ~ 21 (9 ~ 13) 34 ~ 40 (21 ~ 25) 67 ~ 73 (42 ~ 46)

Fully closed 14 ~ 20 (9 ~ 12) 21 ~ 27 (13 ~ 17) 29 ~ 35 (18 ~ 22)

3Fully opened 39 ~ 45 (24 ~ 28) 87 ~ 93 (54 ~ 58) –

(Third) Half throttle 15 ~ 21 (9 ~ 13) 34 ~ 40 (21 ~ 25) –

Fully closed 13 ~ 19 (8 ~ 12) 15 ~ 21 (9 ~ 13) –

2Fully opened 40 ~ 46 (25 ~ 29) 94 ~ 100 (59 ~ 63) –

(Second) Half throttle 15 ~ 21 (9 ~ 13) 94 ~ 100 (59 ~ 63) –

Fully closed 13 ~ 19 (8 ~ 12) 82 ~ 88 (51 ~ 55) –

L– 50 ~ 56 (31 ~ 35) – –

(First)

“Power mode”

Upshift Km/h (mph)

Downshift Km/h (mph)

Range Throttle opening 1 →22 →33 →4

(First Gear) (Second Gear) (Second Gear) (Third Gear) (Third Gear) (Fourth Gear)

DFully opened 49 ~ 55 (30 ~ 34) 99 ~ 105 (62 ~ 66) 169 ~ 175 (105 ~ 109)

(Drive) Half throttle 37 ~ 43 (23 ~ 27) 74 ~ 80 (46 ~ 50) 124 ~ 130 (77 ~ 81)

3Fully opened 49 ~ 55 (30 ~ 34) 99 ~ 105 (62 ~ 66) –

(Thire) Half throttle 37 ~ 43 (23 ~ 27) 74 ~ 80 (46 ~ 50) –

2Fully opened 49 ~ 55 (30 ~ 34) – –

(Second) Half throttle 37 ~ 43 (23 ~ 27) – –

Range Throttle opening 1 ←22 ←33 ←4

(First Gear) (Second Gear) (Second Gear) (Third Gear) (Third Gear) (Fourth Gear)

DFully opened 40 ~ 46 (25 ~ 29) 90 ~ 96 (56 ~ 60) 160 ~ 166 (100 ~ 104)

(Drive) Half throttle 21 ~ 27 (13 ~ 17) 53 ~ 59 (33 ~ 37) 98 ~ 104 (61 ~ 65)

Fully closed 13 ~ 19 (8 ~ 12) 24 ~ 30 (15 ~ 19) 46 ~ 52 (29 ~ 32)

3Fully opened 40 ~ 46 (25 ~ 29) 90 ~ 96 (56 ~ 60) –

(Third) Half throttle 21 ~ 27 (13 ~ 17) 53 ~ 59 (33 ~ 37) –

Fully closed 13 ~ 19 (8 ~ 12) 24 ~ 30 (15 ~ 19) –

2Fully opened 40 ~ 46 (25 ~ 29) 94 ~ 100 (59 ~ 63) –

(Second) Half throttle 21 ~ 27 (13 ~ 17) 94 ~ 100 (59 ~ 63) –

Fully closed 13 ~ 19 (8 ~ 12) 82 ~ 88 (51 ~ 55) –

L– 50 ~ 56 (31 ~ 35) – –

(First)

LOCK-UP SPEED CHART Transfer gear ratio: High: 1.000

(

Rear axle ratio: 4.555

)

Km/h (mph)

Mode Lock-Up ON Lock-Up OFF

2nd 3rd 4th 2nd 3rd 4th

Normal 75 ~ 81 55 ~ 61 67 ~ 73 70 ~ 76 47 ~ 53 62 ~ 68

(47 ~ 50 ) (34 ~ 38) (42 ~ 45) (43 ~ 47) (29 ~ 33) (39 ~ 42)

Power 72 ~ 78 77 ~ 83 77 ~ 83 67 ~ 73 68 ~ 74 72 ~ 78

(45 ~ 48 ) (48 ~ 52) (48 ~ 52) (42 ~ 45) (42 ~ 46) (45 ~ 48)

D range

Throttle

opening

ELECTRONIC DIAGNOSIS

HOW TO DIAGNOSE THE PROBLEM

1. To avoid incorrect diagnostics: this book needs to be

followed accurately. Unless stated: do not jump

directly to a section that could contain the solution:

some important information may be missed.

2. The sections in CAPITALS and bold are the main

sections that can be found in the contents.

3. The GOTO “SECTION” means to continue to check

going to the “section”.

4. The GOTHROUGH “SECTION” means to go through

the “section” and then to go back to the place the

GOTHROUGH was written.

5. BASIC ELECTRIC CIRCUITS:

You should understand the basic theory of electricity.

This will include the meaning of voltage, amps,

ohms, and what happens in a circuit with an open or

shorted wire. You should also be able to read and

understand wiring diagrams.

6. IGNITION CYCLE:

When the car is driven a malfunction can occur due to

a car wiring harness problem, in this case the driver

can reset the system (as on a personal computer). To

reset the computer he must:

(1) Stop the car and the engine.

(2) Turn the key ignition OFF.

(3) Turn the key ignition ON.

CHECK TRANS INDICATOR

Find CHECK TRANS indicator and verify if it is:

A. Flashing: GOTO DIAGNOSTIC CHECK.

B. Staying on: GOTHROUGH CHECK TRANS CHECK.

C. Is never ON when the ignition key is turned on:

GOTHROUGH CHECK TRANS CHECK

D. Is ON during 2 to 3 seconds at ignition but OFF after:

Normal operation. No DTC or malfunction.

CHECK

TRANS

821LW003

DIAGNOSTIC CHECK

This test determines if the transmission itself or its

inputs or outputs connections or sensors are failing.

1. Connect the TECH2: GOTHROUGH TECH2

CONNECTION.

2. Turn on the ignition but not the engine.

3. Push “F2” on TECH2 to see the Diagnostic Trouble

Codes (DTC):

4. IF you have DTC?

YES: write down all code numbers and do the DTC

CHECK

NO: the DTC can not help you finding the problem.

(1) GOTHROUGH “CHECK TRANS” CHECK

(2) IF it is flashing and the flash is 0.2 seconds ON

and 0.2 seconds OFF, this means that you should

have a DTC stored. Please recheck GOTO

DIAGNOSTIC CHECK

(3) IF the CHECK TRANS indicator is not flashing

GOTO WITHOUT DTC SET.

Normal

Abnormal

OFF

IGN Key ON

3 Sec.

(Lamp check)

OFF

IGN Key ON

3 Sec.

(Lamp check)

0.2 Sec.

(2.5 Hz)

3.2 Sec.

0.2 Sec.

“CHECK TRANS” CHECK

1. CASE it is ON during 2 to 3 seconds at ignition (or

when the engine is cranked) but it is OFF after. The

indicator is working normally GOTO DIAGNOSTIC

CHECK.

2. CASE it is flashing and the flash is 0.2 seconds ON

and 0.2 seconds OFF always when ignition is on

(engine cranked or not). This means that there is a

malfunction. GOTO DIAGNOSTIC CHECK.

3. CASE the CHECK TRANS indicator is flashing always

and the flash is 0.4 seconds ON and 0.4 second OFF.

(1) This means that the Transmission Control Module

(TCM) is in flashing code mode. This mode is only

used for service. This mode is set when the

terminal 11 of data link connector C-102 is set to

ground. To go out of this mode.

(2) Check if terminal 11 of data link connector C-102

is shorted to ground. (Voltage is about 0 volts

when there is a short to ground instead of 5

volts).

(3) Check if TCM terminal D16 has the same problem.

(4) Remove the short circuit to ground due to wiring

problems.

(5) IF problem solved: GOTO CHECK TRANS

INDICATOR.

OFF

IGN Key ON

3 Sec.

(Lamp check)

OFF

IGN Key ON

3 Sec.

(Lamp check)

0.2 Sec.

(2.5 Hz)

3.2 Sec.

0.2 Sec.

Normal

Abnormal

826RV061

87654321

161514131211109

TRANSMISSION

CONTROL

MODULE

(TCM)

CHECK TRANS

INDICATOR

CONTROL

DIAGNOSTIC

INPUT

CHECK TRANS

(METER)

B-248

B-242

FUSE

CB-5

15A

FUSE BOX

ORN/BLU

H-26

D16(16) C-95

C10(10) C-95

YEL/BLK

11 45

DATA LINK

CONNECTOR

(C-102)

ORN/BLU

4. CASE it is staying ON always when Ignition is ON.

(1) This means that connection between the Lamp

and the TCM is shorted to ground.

(2) Verify if instrument panel terminal 8 of connector

B-24 is shorted to ground.

(3) Verify if the TCM connector C-95 terminal C10 is

shorted to ground.

(4) Verify that the instrument panel terminal 2 of con-

nector B-24 is connected to battery.

(5) IF problem solved: GOTO CHECK TRANS

INDICATOR.

5. CASE it is staying OFF with the ignition ON (engine

OFF).

(1) This means that connection between the lamp

and the TCM is shorted to battery or opened.

(2) Verify if instrument panel terminal 8 of connector

B-24 is shorted to battery or open.

(3) Verify if the TCM connector C-95 terminal C10 is

shorted to battery or open.

(4) Verify that the instrument panel terminal 2 of

connector B-24 is connected to battery. If not

check the fuses and the connections voltage.

(5) IF problem solved: GOTO CHECK TRANS

INDICATOR.

D07LW004

FLASHING CODES

1. ON BOARD DIAGNOSIS (SELF-DIAGNOSIS)

(1) The Transmission Control Module (TCM)

conducts a self-test of most of the wiring and

components in the system each time the key is

turned ON. If a fault is detected the TCM will store

a Diagnostic Trouble Code (DTC) in memory. It’s a

number that corresponds to a specific problem.

(2) When the problem detected is important: the

CHECK TRANS indicator is flashing (turned ON

0.2 seconds and OFF 0.2 seconds) until the fault is

repaired and the TCM memory is cleared.

OFF

IGN Key ON

3 Sec.

(Lamp check)

OFF

IGN Key ON

3 Sec.

(Lamp check)

0.2 Sec.

(2.5 Hz)

3.2 Sec.

0.2 Sec.

Normal

Abnormal

2. DIAGNOSTIC TROUBLE CODES (DTC)

(1) DTC can be displayed by the Transmission

Control Module (TCM) by shorting together

terminals 11 and 4 or 5 (ground) of the TCM

Diagnosis Connector (C-102) located driver

compartment.

(This grounds the TCM pin D16).

826RV061

87654321

161514131211109

OFF

Diagnostic test start

0.4 Sec. 0.4 Sec.

3.2 Sec. 0.4 Sec. 0.4 Sec.

(1.25 Hz)

OFF

The trouble code(s) will flash 3 times.

Example: DTC 11 x 3 (times), DTC 32 x 3 (times)

3.2 Sec.

0.4 Sec. 0.4 Sec. 0.4 Sec. 0.4 Sec.

0.4 Sec.

1.2 Sec. 1.2 Sec. 0.4 Sec.

Diagnostic test start

Normal

Abnormal

(2) After this, the CHECK TRANS Indicator will be OFF

for 3.2 second and then will flash each DTC 3

times.

1When there are more than 9 flashes this

means that the indicator is constantly flashing,

OFF for 0.4 seconds, ON for 0.4 seconds. In

this case there is no DTC stored in memory.

•To find the problem without a scan tool and

without DTC GOTO WITHOUT DTC SET.

2When there are less than 9 flashes you will

see DTC of 2 digits repeated 3 times each and

when all codes have been displayed they are

displayed again beginning from the first one.

3Do not care about the DTC order : if “21” is

before “22” it does not matter.

4Write down all codes numbers and GOTO DTC

CHECK.

(3) IF CHECK TRANS indicator is not flashing GOTO

“CHECK TRANS” CHECK.

TECH2 CONNECTION

In order to access Transmission Control Module (TCM)

data, use of the TECH2 scan tool is required.

1. The electronic diagnosis equipment is composed of:

(1) TECH2 (3000094) hand-held scan tool, and DLC

cable (3000095).

(2) SAE 16/19 adapter (3000098) (1), RS 232 loop back

connector (3000112) (2), and PCMCIA card

(3000117) (3).

901RW176

F07RW033

2. Connecting the TECH2

NOTE:

Always observe instructions in the TECH 2 and the Holden

Program PCMCIA card.

Before operating the Isuzu PCMCIA card with the TECH2,

the following steps must be performed:

1. The Holden Program PCMCIA card (1) inserts into the

TECH2 (5).

2. Connect the SAE 16/19 adapter (3) to the DLC

cable(4).

3. Connect the DLC cable to the TECH2 (5).

CAUTION

Make sure the vehicle ignition is off.

Connecting TECH 2 with the engine running may

result in the transmission entering 'Fail- safe' mode.

Should this occur, cycle the ignition to perform a

system reset.

Legend

1. PCMCIA Card

2. RS232 Loop Back Connector

3. SAE 16/19 Adaper

4. DLC Cable

5. Tech2

901RW180

87654321

161514131211109

826RV061

Press (ENTER) To Continue

060RW009

5. Connect the TECH2 SAE 16/19 adaptor to the vehicle

DLC.

6. The vehicle ignition turns on.

7. Verify the TECH2 power up display.

NOTE:

The RS232 Loop back connector is only to use for

diagnosis of TECH2 and refer to user guide of the TECH2.

CLEAR DTC

Remark: If you clear the DTC (Diagnosis Trouble

Codes) you will not be able to read any codes

recorded during the last Trouble.

Remark: To be able to use the DTC again to identify a

problem you will need to reproduce the fault or the

problem. This may require a new test drive or just

turning the ignition on (this depends on the nature of

the fault).

1. IF you have a TECH2:

(1) Connect the TECH2 if it is still not connected

GOTHROUGH TECH2 CONNECTION.

(2) Push “F4” and answer “Yes” to the question “Do

you really want to clear the codes?”

1When a malfunction remains as it is the

TECH2 displays “4L30E CODES NOT

CLEARED”. This means that the problem is

still there or that the recovery was not done

please GOTO DTC CHECK.

2When a malfunction has been repaired and

the recovery is done the TECH2 displays

“4L30E CODES CLEARED”.

2. IF you have no TECH2:

(1) Short the Data Link Connector C-102 terminal 11

to terminal 4 or 5 (ground).

1IF it is flashing and the flash is 0.4 seconds ON

and 0.4 second OFF without interruption, this

means that there is no DTC. The DTCs are

already cleared.

(2) IF a code is flashed, wait until the lamp is

flashing.

(3) Push POWER SWITCH (do this within 3 second).

1If you continue to have malfunctions: This

means that the problem is still there or that

the recovery was not done please see DTC

CHECK.

(4) IF you can not clear the DTC:

1GOTHROUGH TCM PRECAUTIONS.

2Disconnect the TCM.

3Reconnect the TCM.

4IF the DTC is not cleared: GOTO TCM MEM-

CAL REPLACEMENT.

87654321

161514131211109

826RV061

DTC CHECK

1 Diagnosis Trouble Codes (DTC) have been identified

by TECH2 or FLASHING CODES.

2. You have written the list of the DTC. The order of the

malfunctions has no meanings for this TCM. Usually

only one or two malfunctions should be set for a

given problem.

3. Check directly the DTCs you identified. The DTC are

sorted by number. See Chart 2:

DIAGNOSTIC TROUBLE CODES (Page 7A1-63).

F0: DATA LIST QUICK CHECK

TECH2 DISPLAY CONDITONS CORRECT VALUE FOR

DIAGNOSIS

SEE*1

BATTERY VOLTAGE Ignition ON 9 V ≤voltage ≤15.5 V DTC 25

(V) or 26

FORCE MOTOR CUR. Engine at idle speed approx. 0.9 A DTC 35

CALCULAT. PRESS. Parking brake on approx. 4.0 bar

Selector lever position ”D“

SOLENOID A Vehicle traveling at a speed of: approx. ACTIVE DTC 31

50 km/h (32 mph) with selector lever in or 41

position ”2“ or approx. 70 km/h (44 mph)

with selector lever in position ”3“

SOLENOID B Vehicle traveling at a speed of: approx. ACTIVE DTC 32

10 km/h (6 mph) with selector lever in or 42

position ”L“ or approx. 30 km/h (18 mph)

with selector lever in position ”2“

BAND APPLY SOL. Engine at idle speed approx. 99% DC DTC 34

Selector lever position ”L“or 44

TCC SOLENOID Vehicle traveling at a speed of approx. ON DTC 33

80 km/h (50 mph) or 43

Selector lever position ”D“

TCC SLIP RPM Constant engine speed 0±10 RPM DTC 33

Selector lever position “D”or 43

TCC on

BRAKE SWITCH Ignition ON ACTIVE DTC 55

Brake pedal pressed or 56

AT INPUT SPEED Engine speed ≤200 rpm Engine speed: (RPM) DTC 13

Output speed > 1024 rpm or 62

Selector lever position ”D“, ”3“, ”2“, ”L“

AT OUTPUT SPEED Output speed ≤0 rpm Output speed: DTC 11

Engine speed > 3000 rpm (RPM) or 13

Selector lever position ”D“, ”3“, ”2“, ”L“

BAROMETER Engine at idle speed 0.9 ~ 1.0 bar –

SENSOR approx. 0.02 V

SELECTOR POS. Ignition ON Dependent on DTC 53

Shift through all selector lever positions selector lever position or 54

P, R, N, D, 3, 2, L

ACTUAL GEAR Vehicle traveling at a speed of approx. - 4 - DTC 61

100 km/h (62 mph)

Selector lever position ”D“

NOTE: (*1) FOR DIAGNOSIS OF A DTC SEE CHART 2: DIAGNOSTIC TROUBLE CODES (DTC)

(PAGE 63)

•IF ALL VALUES ARE CORRECT, CONTINUE DIAGNOSIS WITH F5: ACTUATOR TEST QUICK CHECK.

NOTE: (*1) FOR DIAGNOSIS OF A DTC SEE CHART 2: DIAGNOSTIC TROUBLE CODES (DTC)

(PAGE 63)

TECH2 DISPLAY CONDITONS CORRECT VALUE FOR

DIAGNOSIS

SEE*1

SELECTOR PIN A Ignition ON ACTIVE DTC 53

Selector lever position: or 54

”P“, ”R“, ”3“ or ”2“

SELECTOR PIN B Ignition ON ACTIVE DTC 53

Selector lever position: or 54

”R“, ”N“,”D“ or ”3“

SELECTOR PIN C Ignition ON ACTIVE DTC 53

Selector lever position: or 54

”D“, ”3“, ”2“ or ”L“

SELECTOR PIN P Ignition ON ACTIVE DTC 53

Selector lever position: or 54

”P“, ”N“, ”3“ or ”L“

TPS SIGNAL Ignition ON

Throttle body in idle speed position 0.1 V to 0.96 V (0%) DTC 21

Throttle body in full load position 4.9 V or less (99%) or 22

KICK DOWN SWITCH Ignition ON ACTIVE DTC 52

Depress accelerator pedal to stop

A/C REQUEST Engine running. Air conditioning ON. ACTIVE

CHECK WIRE

Compressor engaged. FROM TCM

CONNECTOR

C-91

TERMINAL

D8 FOR

OPEN

CIRCUIT.

TRANSM. OIL TEMP. Engine running 70 - 120°C/158 - 248°F DTC 15

approx. 1.00 ~ 3.10 V or 16

COOLANT TEMP SW. Ignition ON: Engine warm COLD (≤63°C) DTC 51

WARM (> 70°C)

POWER SWITCH Ignition ON ACTIVE TRANSMIS-

Press “POWER” switch SION

OPERATING

POWER LAMP Engine running ON MODE TEST

Press “POWER” switch SEE PAGE

133

CHART 1: DIAGNOSIS CONNECTOR AND VOLTAGE SUPPLY TEST

FUSE

EB-12

10A

RELAY &

FUSE

BOX

FUSE

EB-14

20A

ECM

MAIN

RELAY

A4(4) A7(7) A8(8) C-96

TO ECM

TRANSMISSION

CONTROL

MODULE (TCM)

BATTERY

INPUT

GROUND

IGNITION

INPUT

DIAGNOSTIC

INPUT

X-18

3 2 X-18

RED/

GRN

SERIAL DATA

ENGINE CONTROL MODULE (ECM)

DATA LINK CONNECTOR (C-102)

35 E-61 54911

YEL YEL/BLK

BLK

(8)

(17)

(1) C-95D16

(32)

BLU/

RED RED/

BLU

RED/BLU

YEL

BLK BLK

YEL

D07LW005

CHART 1: DIAGNOSIS CONNECTOR AND VOLTAGE SUPPLY TEST

TECH2 REFERS TO CHART 1 WHEN THE EQUIPMENT IS CORRECTLY CONNECTED, BUT NO DATA (WITH IGNITION ON) IS RECEIVED

FROM TECH2.

•PERFORM TECH2 SELF-TEST.

IS TECH2 OK?

•IGNITION SWITCH OFF.

•DISCONNECT TCM CONNECTOR C-95 AND C-96.

•IGNITION SWITCH ON.

•CONNECT VOLTMETER BETWEEN TERMINAL A4 AND

GROUND TERMINAL C1 OR D1 OF TCM CONNECTOR.

•THEN CONNECT VOLTMETER BETWEEN TERMINAL A7

OR A8 AND GROUND TERMINAL C1 OR D1 OF TCM

CONNECTOR.

DO BOTH DISPLAYS INDICATE BATTERY VOLTAGE?

•IGNITON SWITCH OFF.

•CONNECT OHMMETER BETWEEN TERMINAL 11 OF 16-PIN

DATA LINK CONNECTOR C-102 AND TERMINAL D16 OF

TCM CONNECTOR C-95.

•THEN CONNECT OHMMETER BETWEEN TERMINAL 4 OR 5

OF 16-PIN DATA LINK CONNECTOR C-102 AND GROUND.

DO BOTH DISPLAYS INDICATE APPROXIMATELY 0 OHMS?

•CHECK FOR SHORT BETWEEN TERMINAL D16 AND

GROUND AND BETWEEN TERMINAL D16 AND B+.

IF OK, REPLACE TCM

YES

SEE TECH2 OPERATOR’S MANUAL.

CHECK FUSE OR WIRE FOR OPEN.

CHECK WIRE FOR OPEN.

CHART 2: DIAGNOSTIC TROUBLE CODE (DTC)

FOR

DTC MALFUNCTION DIAGNOSIS

SEE PAGE

11 OUTPUT SPEED FAILURE 7C1 - 66

13 ENGINE SPEED FAILURE 7C1 - 70

15 TRANSMISSION OIL TEMPERATURE SHORT TO PLUS OR OPEN 7C1 - 72

16 TRANSMISSION OIL TEMPERATURE SHORT TO GROUND 7C1 - 74

21 THROTTLE POSITION SENSOR SHORT TO PLUS 7C1 - 76

22 THROTTLE POSITION SENSOR SHORT TO GROUND OR OPEN 7C1 - 78

23 THROTTLE POSITION SENSOR CONNECTOR OPEN 7C1 - 80

25 SUPPLY VOLTAGE TOO LOW 7C1 - 82

26 SUPPLY VOLTAGE TOO HIGH 7C1 - 84

31 SOLENOID A SHORT TO GROUND OR OPEN 7C1 - 86

32 SOLENOID B SHORT TO GROUND OR OPEN 7C1 - 88

33 TCC HIGH SHORT TO PLUS OR OPEN 7C1 - 90

34 BAND APPLY SOLENOID SHORT TO GROUND OR OPEN 7C1 - 94

35 FORCE MOTOR OPEN OR SHORT TO PLUS OR GROUND 7C1 - 96

36 SHIFT HIGH SHORT TO GROUND OR OPEN 7C1 - 98

37 TORQUE MANAGEMENT SERIAL LINE FAULTY 7C1 - 100

41 SOLENOID A SHORT TO PLUS 7C1 - 102

42 SOLENOID B SHORT TO PLUS 7C1 - 104

43 TCC HIGH SHORT TO GROUND 7C1 - 106

44 BAND APPLY SOLENOID SHORT TO PLUS 7C1 - 108

46 SHIFT HIGH SHORT TO PLUS 7C1 - 110

51 ENGINE COOLANT SWITCH SHORT TO GROUND, PLUS OR OPEN 7C1 - 112

52 KICK DOWN ALWAYS ON OR SHORT TO GROUND 7C1 - 114

53 MODE SWITCH IN P OR N OR R BAD POSITION 7C1 - 116

54 MODE SWITCH ILLEGAL POSITION 7C1 - 118

55 BRAKE SWITCH SHORT TO GROUND OR OPEN 7C1 - 120

56 BRAKE SWITCH SHORT TO PLUS 7C1 - 122

61 GEAR ERROR 7C1 - 124

62 DOWNSHIFT PROTECTION 7C1 - 126

63 EPROM CSUM FAILURE 7C1 - 129

82 SHIFT OR BAND APPLY SOLENOIDS FAULTY DURING DRIVING 7C1 - 130

CHART 3: TRANSMISSION AND TCM IDENTIFICATION

Chart 3 contains a list of all important information concerning rear axle ratio, Transmission Control Module

(TCM), and transmission identification.

VEHICLE TCM TRANSMISSION

Type Engine Holden Part No. Calibration Holden Part No. Model Code

Code

Holden/ 3.2L V6 4.555

TFR 8-09350-909-0 G22 8-96018-434-0 FV (4X2)

Rr axle

Ratio

The idenification plate is

located on the left-hand side

of the transmission above the

mode switch.

AT Transmission identification on

vehicle identification plate :

1. Model code

2. Calibration code

3. Production serial number

4. Production part number

TCM IDENTIFICATION:

A. ISUZU part number

B. Model of car

C. DELCO part number

D. Application

E. Service TCM number

F. Broadcast code

G 22

0000 000

018 434

PART No.

SERIAL No.SAL

HYDRAMATIC

STRASBOURG

MADE IN FRANCE

234

F07LW001

CHART 5: F5: ACTUATOR TEST QUICK CHECK

Before carrying out the Actuator Test, the selector lever should be placed in selector position ”N“.

The ignition should be switched ON, and the engine not running.

FOR

TECH2 DISPLAY NOTES CORRECT RESULT DIAGNOSIS

SEE1

SOLENOID A Press arrow up (ON) “Click” heard from DTC 31

Press arrow down (OFF) transmission or 41

SOLENOID B Press arrow up (ON) “Click” heard from DTC 32

Press arrow down (OFF) transmission or 42

SHIFT SOLENOID Press arrow up (ON) “Click” heard from DTC 82

Press arrow down (OFF) transmission

TCC SOLENOID Not used ––

TCC HIGH (D) Press arrow up (ON) “Click” heard from DTC 33

Press arrow down (OFF) transmission or 43

POWER LAMP Press arrow up (ON) POWER lamp ON TRANSMISSION

Press arrow down (OFF) OPERATING

MODE TEST

(PAGE 133)

CHK. TRN. LAMP Press arrow up (ON) CHECK TRANS lamp CHECK TRANS

Press arrow down (OFF) ON CHECK (PAGE 50)

1FOR DIAGNOSIS OF A DTC SEE CHART 2: DIAGNOSTIC TROUBLE CODES (DTC) (PAGE 63)

DIAGNOSTIC TROUBLE CODE (DTC) 11

OUTPUT SPEED FAILURE

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

The transmission output speed sensor provides

information on vehicle speed to the Transmission

Control Module (TCM). The speed sensor circuit

consists of a magnetic induction type sensor. The

sensor is mounted above a target wheel pressed on

the output shaft in the transmission extension. As

the output shaft turns, the target wheel teeth induce

a variable voltage in the magnetic pickup. This

alternating current (AC) signal is provided to the

TCM. The voltage increases with the speed of the

wheel but this is not used to define the speed of the

vehicle. As the vehicle moves faster, the signal

alternates faster between positive and negative

voltages. The Output speed information is

proportional to the frequency of the signal.

Diagnostic Aids:

•This diagnostic is not an electrical test done by

the TCM but a test between different information

(“logic test”).

•Detection conditions:

1Output Speed < or = 0 RPM.

2Engine Speed > 3000 RPM.

3No Malfunction: Engine Speed DTC 13. Mode

Switch DTC54.

4Selector lever not in Park, Reverse, or Neutral.

5The conditions need to be present for at least

5 seconds.

•Action after the detection time:

1CHECK TRANS Indicator is turned ON.

2TCM in BACKUP MODE

•Recovery conditions : To recover do an IGNITION

CYCLE.

TRANSMISSION

CONTROL

MODULE (TCM)

TRANSMISSION

SPEED SENSOR

A12(12)

C-96

C-95

C1(1)

D1(17)

M-15

TRANSMISSION SPEED

SENSOR SHIELDS

—

OUTPUT

SPEED

INPUT

H-23

PNK

B11(23)

B12(24)

GROUND

BLK BLK

H-25

PNK

BLU

BLK

BLU

D07LW006

IF the DTC 53 is set:

GOTHROUGH DTC 53 first

and do a test drive.

Problem is intermittent.

GOTO INTERMITTENT

CONDITIONS.

Check for faulty TCM connection.

IF OK, REPLAC TCM

YES

IF you have a SCAN TOOL: TECH2?

• Raise drive wheels.

• Connect the TECH2 GOTHROUGH TECH2

CONNECTION.

• Push “F0”: DATALIST: DISPLAY. Read “AT OUTPUT

SPEED”.

IF: Output Speed different from 0 RPM when the wheels

are turning:

• Ignition switch OFF.

• Disconnect TCM connector C-95 and C-96.

• Connect ohmmeter between connector C-96 terminal

A12 and terminal B12.

IF: display is approx. 3K ohms:

• Connect ohmmeter between connector

C-96 terminal A12 and ground connector

C-95 terminal C1.

IF: display indicates an open circuit:

Replace transmission

speed sensor.

YES

YES NO

YES

• Disconnect transmission speed

sensor connector M-15.

• Connect ohmmeter between

terminals 1 and 2 of the speed

sensor.

IF: display approx. 3K ohms:

• Wires from Connector

C-96 to sensor

connector are open or

shorted together.

• Repair.

HINT: the wire between TCM terminal B12 and sensor connector M-15 terminal 2

can be shorted to ground or open without creating a problem because the TCM

B12 pin is connected to the TCM ground internally and the signal is detected only

on the A12 input.

• Check wire for a short to ground between terminal A12 and sensor connector

M-15 terminal 1.

IF: display indicates a short circuit:

DIAGNOSTIC TROUBLE CODE (DTC) 11

OUTPUT SPEED FAILURE

CAUTION:

If wire to connector C-96 terminal B12 is short to voltage, Transmission Control Module

(TCM) will be damaged.

CONTINUED

ON NEXT PAGE

CONTINUED FROM

NOYES

YES NO

•Connect voltmeter between connector C-96

terminal A12 and ground connector C-95

terminal C1.

•Ignition switch ON.

IF: display indicates approximately 0 volt:

Check for faulty TCM

connectors.

IF OK, REPLACE THE

TCM

Check wire for a short

to voltage between

terminal A12 and

speed sensor

connector M-15.

Repair.

DIAGNOSTIC TROUBLE CODE (DTC) 13

ENGINE SPEED SIGNAL FAILURE

This DTC flashes the CHECK TRANS indicator and

set the BACKUP MODE.

Circuit Description:

The Engine Control Module (ECM) sends a signal to

the Transmission Control Module (TCM) that

indicates engine speed in RPM. When the vehicle is

in neutral gear and the engine is at idle, the engine

speed should be approximately 800 RPM.

Diagnostic Aids:

• This is not an electrical test performed by the

TCM, but a comparison of different information

signals (a “logic test”).

•Detection conditions:

1Engine speed < or = 200 RPM.

2 Output Speed > 1024 RPM.

3 Vehicle speed > 2 Kmh.

4No DTC: Output Speed DTC11, Downshift

Protection DTC62 or Mode Switch Illegal

Position DTC54.

5Selector Lever not in Park or Neutral.

6The conditions need to be present for at least

0.5 second.

•Action after the detection time: BACKUP MODE

• Recovery conditions: CYCLE IGNITION

ENGINE

RPM

INPUT

TRANSMISSION

CONTROL

MODULE (TCM)

ECM

TACHOMETER ( METER

C-95

D12(28)

ENGINE

RPM

OUTPUT

B-24 3 )

H-20

6 12 E-61

BLK/RED BLK/RED

H-6

D07LW007

DIAGNOSTIC TROUBLE CODE (DTC) 13

ENGINE SPEED FAILURE

Install scan tool.

GOTHROUGH TECH2 CONNECTION.

•Engine running at idle.

•Brake applied.

•Selector lever position “N” or “P”.

•Selector “F0: DATA LIST: AT INPUT

SPEED”.

IF: TECH2 DISPLAY approximately 800

RPM:

This system is functioning correctly.

The problem is probably intermittent.

GOTO

INTERMITTENT CONDITIONS.

IF: Tachometer displays engine speed?

•Check wire for open or short to ground or short to

voltage between Tachometer connector B-24

terminal 3 and engine control module (ECM)

connector E-61 terminal 12 or between these

terminals and intermediate connector H-6 terminal

16.

•Repair harness. If still not working:

Check Engine electrical section.

If still problem, replace engine control module

(ECM).

YES NO

•Check wire for open or short to ground or short to

voltage between Transmission Control Module (TCM)

and connector C-95 & C-96, and connector C-95

terminal D12 and engine control module (ECM)

connector E-61 terminal 12, and check intermediate

connector H-20 terminal 6.

•Repair harness. If still not working: GOTO TCM MEM-

CAL REPLACEMENT.

DIAGNOSTIC TROUBLE CODE (DTC) 15

TRANSMISSION OIL TEMPERATURE SHORT TO PLUS OR OPEN

This DTC does NOT flash the CHECK TRANS

indicator and does NOT set the BACKUP MODE.

Circuit Description:

•The transmission oil temperature sensor is a

thermistor within the internal wiring harness of

the transmission in the adaptor case oil pan. The

Transmission Control Module (TCM) applies 5

volts to the sensor connector M-6 terminal 3(C).

The other side of the sensor is connected to

ground through the TCM terminal C14.

When the transmission oil is cold, the sensor

resistance is high and the TCM will sense high

signal voltage.

•As the transmission oil temperature warms to

normal transmission operating temperature of

80°C (176°F), the sensor resistance becomes less

and the voltage decreases at about 3.5 volts.

Note, for more accuracy the measurement is

done differently for low temperature (less than

45°C) and high temperature (more than 50°C).

•When DTC15 is set, the transmission will use a

warm value for operation, but the scan tool will

display the actual oil temperature.

•Table shows thermistor resistance at different

temperatures.

Table:

Diagnostic Aids:

•This Diagnostic is an electrical test done by the

TCM.

•Detection conditions:

1Voltage between terminals B3 and C14 > 4.74

volts.

2The condition needs to be present for at least

20 seconds. Note: during the detection time

the TCM reads the high voltage that defines a

–40°C temperature.

•Action after the detection time: Default Trans-

mission Oil Temperature is set to 100°C.

•Recovery conditions: To recover when voltage <

or = to 4.74 volts after detection time.

°C°F Resistance (kΩ)

–40 –40 672

032 65

20 68 25

80 176 2.5

120 248 0.78

150 304 0.37

TRANSMISSION

OIL

TEMPERATURE

SENSOR

INPUT

GROUND

TRANSMISSION

CONTROL

MODULE (TCM)

AUTOMATIC

TRANSMISSION

M-6

3(C)

5(D)

C-96

TRANSMISSION

OIL

TEMPERATURE

SENSOR

H-38

GRY

H-25

BLU

C1(1)

D1(17)

BLK

C-95

B3(15)

C14(14)

GRY

BLU

BLK

D07LW008

DIAGNOSTIC TROUBLE CODE (DTC) 15

TRANSMISSION OIL TEMPERATURE SHORT TO PLUS OR OPEN

Install scan tool

GOTHROUGH TECH2 CONNECTION.

•Connect voltmeter between connector

C-96 terminal B3 and connector C-95

ground terminal C1.

IF: If you have more than

approximately 4.74 Volts:

•Check for a short to plus or open between connector

C-96 terminal B3 and connector C-95 terminal C14.

This faulty connection can be at the connector M-6

terminal 3 (C) or 5 (D). This faulty connection can be

at the intermediate connector H-38 terminals.

•Repair

If not OK: Disconnect sensor.

•Connect ohmmeter between sensor terminals 3(C)

and 5(D).

Refer to the table of the resistance function of the

temperature.

If resistance not correct, replace the transmission oil

temperature sensor.

YES

DTC 15 is intermittent.

GOTO INTERMITTENT CONDITIONS.

REPLACE TCM

•Ignition switch ON. Engine not running.

•Selector lever position “P”.

•Select “F0: DATA LIST: Trans. Oil Temp”.

IF: TECH2 DISPLAY more than 4.74 Volts:

DIAGNOSTIC TROUBLE CODE (DTC) 16

TRANSMISSION OIL TEMPERATURE SHORT TO GROUND

This DTC does NOT flash the CHECK TRANS

indicator and does NOT set the BACKUP MODE.

Circuit Description:

•The transmission oil temperature sensor is a

thermistor within the internal wiring harness of

the transmission in the adaptor case oil pan. The

Transmission Control Module (TCM) applies 5

volts to the sensor connector M-6 terminal 3(C).

The other side of the sensor is connected to

ground through the TCM terminal C14. When the

transmission oil is cold, the sensor resistance is

high and the TCM will sense high signal voltage.

•As the transmission oil temperature warms to

normal transmission operating temperature of

80°C (176°F), the sensor resistance becomes less

and the voltage decreases at about 3.5 volts.

Note, for more accuracy the measurement is

done differently for low temperature (less than

45°C) and high temperature (more than 50°C).

•When DTC16 is set, the transmission will use a

warm value for operation, but the scan tool will

display the actual oil temperature.

•Table shows thermistor resistance at different

temperatures.

Diagnostic Aids:

•This Diagnostic is an electrical test done by the

TCM.

•Detection conditions:

1Voltage between terminals B3 and C14 < 0.4

volts.

2The condition needs to be present for at least

20 seconds. Note: during the detection time

the TCM reads the low voltage that defines a

170°C temperature.

•Action after the detection time: Default Trans-

mission Oil Temperature is set to 100°C.

•Recovery conditions: To recover when voltage >

or = to 0.4 volts after detection time.

TRANSMISSION

OIL

TEMPERATURE

SENSOR

INPUT

GROUND

TRANSMISSION

CONTROL

MODULE (TCM)

AUTOMATIC

TRANSMISSION

M-6

3(C)

5(D)

C-96

TRANSMISSION

OIL

TEMPERATURE

SENSOR

H-38

GRY

H-25

BLU

C1(1)

D1(17)

BLK

C-95

B3(15)

C14(14)

GRY

BLU

BLK

D07LW008

DIAGNOSTIC TROUBLE CODE (DTC) 16

TRANSMISSION OIL TEMPERATURE SHORT TO GROUND

Install scan tool

GOTHROUGH TECH2 CONNECTION.

•Ignition switch ON. Engine not

running.

•Selector lever position “P”.

•Select “F0: DATA LIST: Trans. Oil

Temp”.

IF: TECH2 DISPLAY less than 0.4 Volts:

DTC 16 is intermittent.

GOTO INTERMITTENT CONDITIONS.

REPLACE TCM

YES

•Check for a short to ground between

connector C-96 terminal B3 and

connector M-6 terminal 3 (C). This

faulty connection can be at the

intermediate connector H-38 terminal

•Repair

If not OK: Disconnect sensor.

•Connect ohmmeter between sensor

terminals 3(C) and 5(D).

Refer to the table of the resistance

function of the temperature (DTC 15).

If resistance not correct, replace

sensor.

•Connect voltmeter between connector

C-96 terminal B3 and connector C-95

ground terminal C1.

IF: If you have less than approximately

0.4 Volts:

DIAGNOSTIC TROUBLE CODE (DTC) 21

THROTTLE POSITION SENSOR SHORT TO PLUS

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

•The Throttle Position Sensor (TPS) provides a

voltage signal that changes relative to the throttle

plate position. Signal voltage between connector

C-95 terminals C5 and C6 will vary from about 0.4

at idle to about 4.6 volts at wide open throttle.

•The Engine Control Module (ECM) also receives

this signal. This TPS is a variable resistance with

one side (connector E-68 terminal 1) connected

only to the ECM connector to have the 5 volts

supply voltage. The other side (connector E-68

terminal 3) is connected to the Transmission

Control Module (TCM) (floating ground) and the

ECM (ground). The “middle” (the wiper) (con-

nector E-68 terminal 2) is connected to the TCM

and the ECM.

•The ECM monitors output voltage from the TPS

and determines fuel delivery based on throttle

valve angle (driver demand).

•This TPS is an electrical component and must not

be soaked in any liquid cleaner or solvent, as

damage may result.

Diagnostic Aids:

•This Diagnostic is an electrical test done by the

TCM.

•Detection conditions:

1Voltage between connector C-95 terminals C5

and C6 > 4.9 volts. This detection occurs

when: The wiper is short to voltage (engine

can stall).

2The condition needs to be present for at least

0.5 seconds. Note: during the detection time

the TCM reads “100% (wide open throttle)”.

•Action after the detection time: BACKUP MODE.

•Recovery conditions: To recover when voltage <

or = to 4.9 volts and do an IGNITION CYCLE.

TPS

INPUT

GROUND

TRANSMISSION

CONTROL

MODULE(TCM)

C-95

C5(5) 5

H-25

C6(6) GRN

BLU

GRN

5VOLT

REFERENCE TPS

INPUT GROUND

GRY

GRY GRY

THROTTLE

POSITION

SENSOR

(TPS)

ENGINE

CONTROL

MODULE

(ECM)

26 39 E-61

E-68

D07LW009

DIAGNOSTIC TROUBLE CODE (DTC) 21

THROTTLE POSITION SENSOR SHORT TO PLUS

Check Engine Control Module (ECM)

DTC.

IF: DTC on Throttle Position Sensor (TPS)

exists:

Check diagnosis of ECM and repair.

•Connect voltmeter between connector

C-95 terminal C5 and TPS ground

terminal C6.

IF: If you have more than 4.9 volts:

DTC 21 is intermittent.

GOTO INTERMITTENT

CONDITIONS.

REPLACE TCM

•Check for a short to voltage or open circuit between connector C-95

terminal C5 and connector E-68 terminal 2.

This faulty connection can be at intermediate connector H-25

terminal 5.

The short to voltage only can be at the ECM connector E-61 terminal

26.

•Repair.

If not OK: Disconnect sensor.

•Connect ohmmeter between sensor terminals 2 wiper and 3 low

side.

If resistance between TPS terminal 2 and 3 does not change when

the throttle valve angle is changed: Replace TPS.

YES NO

NOYES

•Install scan tool GOTHROUGH TECH2

CONNECTION.

•Ignition switch ON, engine not

running.

•Selector lever position “P”.

•Select F0: DATA LIST: “TPS SIGNAL”.

IF: TECH2 DISPLAY more than 4.9 volts:

DIAGNOSTIC TROUBLE CODE (DTC) 22

THROTTLE POSITION SENSOR SHORT TO GROUND OR OPEN

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

•The Throttle Position Sensor (TPS) provides a

voltage signal that changes relative to the throttle

plate position. Signal voltage between connector

C-95 terminals C5 and C6 will vary from about 0.4

at idle to about 4.6 volts at wide open throttle.

•The Engine Control Module (ECM) also receives

this signal. This TPS is a variable resistance with

one side (connector E-68 terminal 1) connected

only to the ECM connector to have the 5 volts

supply voltage. The other side (connector E-68

terminal 3) is connected to the Transmission

Control Module (TCM) (floating ground) and the

ECM (ground). The “middle” (the wiper) (con-

nector E-68 terminal 2) is connected to the TCM

and the ECM.

•The ECM monitors output voltage from the TPS

and determines fuel delivery based on throttle

valve angle (driver demand)

•This TPS is an electrical component and must not

be soaked in any liquid cleaner or solvent, as

damage may result.

Diagnostic Aids:

•This Diagnostic is an electrical test done by the

TCM.

•Detection conditions:

1This detects a TPS wiper short to TCM ground

(except certain conditions) or open and wiper

short to TPS low. This also detects a TPS low

open.

2Voltage between connector C-95 terminals C5

and C6 < 0.2 volts.

3The condition needs to be present for at least

0.5 seconds. Note: during the detection time

the TCM reads “0% (idle)”.

•Action after the detection time: BACKUP MODE.

•Recovery conditions: To recover when voltage >

or = to 0.2 volts and do an IGNITION CYCLE.

TPS

INPUT

GROUND

TRANSMISSION

CONTROL

MODULE(TCM)

C-95

C5(5) 5

H-25

C6(6) GRN

BLU

GRN

5VOLT

REFERENCE TPS

INPUT GROUND

GRY

GRY GRY

THROTTLE

POSITION

SENSOR

(TPS)

ENGINE

CONTROL

MODULE

(ECM)

26 39 E-61

E-68

D07LW009

DIAGNOSTIC TROUBLE CODE (DTC) 22

THROTTLE POSITION SENSOR SHORT TO GROUND OR OPEN

Check Engine Control Module (ECM)

DTC.

IF: DTC on Throttle Position Sensor (TPS)

exists:

Check diagnosis of ECM and repair. •Install scan tool GOTHROUGH TECH2

CONNECTION.

•Ignition switch ON, engine not

running.

•Selector lever position “P”.

•Select F0: DATA LIST: “TPS SIGNAL”.

IF: TECH2 DISPLAY less than 0.2 volts:

•Connect voltmeter between connector

C-95 terminal C5 and TPS ground

terminal C6.

IF: If you have less than 0.2 volts:

DTC 22 is intermittent.

GOTO INTERMITTENT

CONDITIONS.

REPLACE TCM

•Check for a short to ground between connector C-95 terminal C5 and

connector E-68 terminal 2.

This faulty connection can be at the intermediate connector H-25

terminal 5.This faulty connection can be at the ECM connector E-61

terminal 26.

•Repair.

If not OK: Ignition switch OFF. Disconnect sensor connector E-68.

•Connect ohmmeter between connector C-95 terminal C5 and C6.

•Check if the circuit is open.

•Repair.

If not OK: Ignition switch OFF. Disconnect sensor connector E-68.

•Connect ohmmeter between sensor terminals 2 wiper and 3 low

side.

•If resistance between TPS terminal 2 and 3 does not change when

the throttle valve angle is changed: Replace TPS.

YES NO

NOYES

DIAGNOSTIC TROUBLE CODE (DTC) 23

THROTTLE POSITION SENSOR CONNECTOR OPEN

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

•The Throttle Position Sensor (TPS) provides a

voltage signal that changes relative to the throttle

plate position. Signal voltage between connector

C-95 terminals C5 and C6 will vary from about 0.4

at idle to about 4.6 volts at wide open throttle.

•The Engine Control Module (ECM) also receives

this signal. This TPS is a variable resistance with

one side (connector E-68 terminal 1) connected

only to the ECM connector to have the 5 volts

supply voltage. The other side (connector E-68

terminal 3) is connected to the Transmission

Control Module (TCM) (floating ground) and the

ECM (ground). The “middle” (the wiper) (con-

nector E-68 terminal 2) is connected to the TCM

and the ECM.

•The ECM monitors output voltage from the TPS

and determines fuel delivery based on throttle

valve angle (driver demand).

•This TPS is an electrical component and must not

be soaked in any liquid cleaner or solvent, as

damage may result.

Diagnostic Aids:

•This Diagnostic is not an electrical test done by

the TCM but a test between different information

(“logic test”).

•Detection conditions:

1This detects the terminals C5 and C6 open or

the connector E-68 open.

2Throttle value opening > 42%.

3Engine Speed < 2200 RPM.

4Vehicle Speed <3 Km/h.

5No DTC: Engine Speed DTC13, Output Speed

DTC11. Downshift Protection DTC62.

6Only with Selector Lever in Park or Neutral.

7The detection is authorized only during 6

seconds after ignition switch ON.

8The conditions need to be present for at least

3 seconds.

•Action after the detection time: BACKUP MODE.

•Recovery conditions: To recover do an IGNITION

CYCLE.

TPS

INPUT

GROUND

TRANSMISSION

CONTROL

MODULE(TCM)

C-95

C5(5) 5

H-25

C6(6) GRN

BLU

GRN

5VOLT

REFERENCE TPS

INPUT GROUND

GRY

GRY GRY

THROTTLE

POSITION

SENSOR

(TPS)

ENGINE

CONTROL

MODULE

(ECM)

26 39 E-61

E-68

D07LW009

DIAGNOSTIC TROUBLE CODE (DTC) 23

THROTTLE POSITION SENSOR CONNECTOR OPEN

Check Engine Control Module (ECM)

DTC.

IF: DTC on Throttle Position Sensor (TPS)

exists:

Check diagnosis of ECM and repair. •Install scan tool GOTHROUGH TECH2

CONNECTION.

•Ignition switch ON, engine not

running.

•Selector lever position “P”.

•Select F0: DATA LIST: “TPS SIGNAL”.

IF: TECH2 DISPLAY approx. 2.5 volts

whatever the throttle valve position:

IF: TPS connector E-68

on the engine is open: DTC 23 is intermittent.

GOTO INTERMITTENT

CONDITIONS.

Repair.

•Ignition switch OFF. Disconnect connector C-95.

Connect ohmmeter between connector C-95 terminals C5 and C6.

If open circuit:

•Check for an open between connector C-95 terminal C5 to connector

E-68 terminal 2 with a simultaneous open of the terminal C6 to the

connector E-68 terminal 3.

This faulty connection can be at the intermediate connector H-25

terminal 5 and 3.

•Repair.

If not OK: Ignition switch OFF. Disconnect sensor.

•Connect ohmmeter between sensor terminals 2 wiper and 3 low

side.

If resistance between TPS terminal 2 and 3 does not change when

the throttle valve angle is changed: Replace TPS.

YES NO

DIAGNOSTIC TROUBLE CODE (DTC) 25

SUPPLY VOLTAGE TOO LOW

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

The ignition voltage of Transmission Control

Module (TCM) terminals A7 and A8 is monitored by

the TCM and when the voltage is too low (approx. 9

volts) the DTC25 is stored and the BACKUP MODE

is set.

Diagnostic Aids:

•This Diagnostic is an electrical test done by the

TCM.

•Detection conditions:

1Ignition voltage measured between TCM

terminal A7 or A8 and ground C1 is lower

than specification.

Specification decreases with the transmission

oil temperature:

–40°C (–40°F) = 8.7 volts

90°C (194°F) = 9.0 volts

150°C (304°F) = 9.2 volts

2The condition needs to be present for at least

1 second

•Action after the detection time: BACKUP MODE

•Recovery conditions: To recover, the ignition

voltage must be higher than specification.

Specification decreases with the transmission oil

temperature:

–40°C (–40°F) = 9.2 volts

90°C (194°F) = 9.5 volts

150°C (304°F) = 9.6 volts

BATTERY

FUSE

ENGINE

CONTROL

MODULE

(ECM)

BATTERY INPUT

EB-12

10A EB-14

20A RELAY &

FUSE BOX

X-18 3

X-18 5

ECM

MAIN

RELAY

E-61 28E-60

BATTERY

INPUT

(4)

(1)

(17)

TRANSMISSION

CONTROL MODULE

(TCM)

—

RED/

GRN

H-25

RED/BLU RED/BLU

BLU/RED

(7)

BLK

C-95 C-96

7A8

(8)

GROUND IGNITION

INPUT

D07LW010

DIAGNOSTIC TROUBLE CODE (DTC) 25

SUPPLY VOLTAGE TOO LOW

•Ignition switch ON. Engine OFF.

•Connect voltmeter between B+ and B- terminals of

battery.

IF: Display greater than 9 volts:

•Engine running.

•Connect voltmeter between B+ and B- terminals of

battery.

IF: display between 13 and 16 volts?

•Ignition switch OFF.

•Disconnect Transmission Control Module (TCM)

connector C-95 and C-96.

•Ignition switch ON. Engine OFF.

•Connect voltmeter between connector C-96 terminal

A7 and connector C-95 terminal C1.

IF: Display greater than 9 volts:

Check for faulty connection and if OK.

GOTO INTERMITTENT CONDITIONS. Check fuse and wire to A7, A8 and C1 for

open circuit.

Check regulator.

Check battery.

YES

YES NO

DIAGNOSTIC TROUBLE CODE (DTC) 26

SUPPLY VOLTAGE TOO HIGH

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

The ignition voltage of Transmission Control

Module (TCM) terminals A7 and A8 is monitored by

the TCM and when the voltage is too high (approx.

16 volts) the DTC26 is stored and the BACKUP

MODE is set.

Diagnostic Aids:

•This Diagnostic is an electrical test done by the

TCM.

•Detection conditions:

1Ignition voltage measured between TCM

terminal A7 or A8 and ground C1 is higher

than 15.5 volts.

2The condition needs to be present for at least

1 second.

•Action after the detection time : BACKUP MODE

•Recovery conditions: To recover, ignition voltage

=15.5 volts.

BATTERY

FUSE

ENGINE

CONTROL

MODULE

(ECM)

BATTERY INPUT

EB-12

10A EB-14

20A RELAY &

FUSE BOX

X-18 3

X-18 5

ECM

MAIN

RELAY

E-61 28E-60

BATTERY

INPUT

(4)

(1)

(17)

TRANSMISSION

CONTROL MODULE

(TCM)

—

RED/

GRN

H-25

RED/BLU RED/BLU

BLU/RED

(7)

BLK

C-95 C-96

7A8

(8)

GROUND IGNITION

INPUT

D07LW010

DIAGNOSTIC TROUBLE CODE (DTC) 26

SUPPLY VOLTAGE TOO HIGH

•Ignition switch ON. Engine OFF.

•Connect voltmeter between B+ and B- terminals of

battery.

IF: Display greater than 15.5 volts:

•Engine running.

•Connect voltmeter between B+ and B- terminals of

battery.

IF: Display between 3 to 15.5 volts:

Check battery.

Check regulator.

Check regulator. The problem is

intermittent.

GOTO

INTERMITTENT

CONDITIONS.

YES NO

•Ignition switch OFF.

•Disconnect Transmission Control

Module (TCM) connector C-95 and

C-96.

•Ignition switch ON. Engine ON.

•Connect voltmeter between

connector C-96 terminals A7 and

connector C-95 terminal C1.

IF: Display higher than 15.5 volts:

DIAGNOSTIC TROUBLE CODE (DTC) 31

SOLENOID A SHORT TO GROUND OR OPEN

SHIFT

SOLENOID A

CONTROL

GROUND

TRANSMISSION

CONTROL

MODULE (TCM)

SHIFT

SOLENOID

SHIFT

SOLENOID

BAND

APPLY

SOLENOID

AUTOMATIC

TRANSMISSION

M-7

3(D)

4(C)

C-96 YEL/GRN

H-23

H-25

BLK BLK

BLK

A2(2)

C-95

C12(12)

C1(1)

D1(17)

GROUND

BRN/WHT

YEL/GRN

BRN/WHT

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

•The solenoid A is a simple ON/OFF solenoid

located in the main case valve body. The

solenoid is the normally closed-type. In second or

third gear the Transmission Control Module

(TCM) energizes the solenoid to open a fluid inlet

port. When the port is open, fluid pressure

actuates the shift valve.

•The solenoid is activated by a current. This

current is produced by applying a voltage to one

side (the High side) and a ground to the other

side (Low side).

•The High Side Driver (HSD) is a circuit of the TCM

that acts as a switch between the solenoids and

the supply voltage. The High side of the solenoid

is permanently supplied with voltage, except in

BACKUP MODE or when ignition is OFF the HSD

is turned OFF.

•The TCM continually monitors the solenoid

connection to its Low Side Driver (LSD) for either

low or high voltage. The LSD is a circuit of the

TCM that acts as a switch between the solenoid

and ground. When the solenoid is commanded

ON the TCM is switching the solenoid to ground.

•There are two tests of the LSD: When the engine

is cranked (DTC82) and when the ignition is

turned ON (DTC31).

•When the ignition is turned ON, and before the

engine is cranked, the TCM activates the shift

solenoids (A, B and Band) to check for short

circuits or open circuits. To do so the gear is set

to 4th, 3rd, 1st, 1st with band apply, 4th with no

HSD. Each one of the 5 tests requires 0.15

second. If the engine is cranked before the end of

all tests, the remaining tests are not done.

Diagnostic Aids:

•This Diagnostic is an electrical test done by the

TCM.

•Detection conditions:

1The solenoid low side connected to TCM

terminal A2 is shorted to ground or open.

2The test is only done when ignition is ON.

3Engine Speed < 480 RPM (not cranked) and

Output Speed = 0 RPM.

4The conditions need to be present for 0.15 to

1.03 second after ignition switch ON.

•Action after the detection time: BACKUP MODE.

•Recovery conditions: To recover, do an IGNITION

CYCLE.

D07LW011

•Ignition switch OFF.

•Disconnect Transmission Control Module (TCM)

connector C-95 and C-96.

•Connect ohmmeter between connector C-95 terminal

C12 and connector C-96 terminal A2.

IF: Display between 17.5 and 18.5 ohms?

•Check for faulty connector or

wiring between terminal A2

and ground.

•Repair.

YES NO

YES

DIAGNOSTIC TROUBLE CODE (DTC) 31

SOLENOID A SHORT TO GROUND OR OPEN

YES NO

•Connect ohmmeter between connector C-96

terminal A2 and connector C-95 terminal C1

(TCM ground).

IF: Short circuit:

Check for an open circuit between connector C-

96 terminal A2 and connector C-95 terminal C12.

IF: Wiring problem?

The problem is intermittent.

GOTO INTERMITTENT

CONDITIONS.

The problems is

intermittent.

GOTO INTERMITTENT

CONDITIONS.

Replace the solenoid A.

Repair.

•Disconnect solenoid A connector.

•IF: Ohmmeter displays between 17.5 and 18.5

ohms on the solenoid A terminals:

DIAGNOSTIC TROUBLE CODE (DTC) 32

SOLENOID B SHORT TO GROUND OR OPEN

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

•The solenoid B is a simple ON/OFF solenoid

located in the main case valve body. The

solenoid is the normally open-type. When the

port is open, fluid pressure actuates the shift

valve. In first or second gear the Transmission

Control Module (TCM) energizes the solenoid to

close a fluid inlet port.

•The solenoid is activated by a current. This

current is produced by applying a voltage to one

side (the High side) and a ground to the other

side (Low side).

•The High Side Driver (HSD) is a circuit of the TCM

that acts as a switch between the solenoids and

the supply voltage. The High side of the solenoid

is permanently supplied with voltage, except in

BACKUP MODE or when ignition is OFF the HSD

is turned OFF.

•The TCM continually monitors the solenoid

connection to its Low Side Driver (LSD) for either

low or high voltage. The LSD is a circuit of the

TCM that acts as a switch between the solenoid

and ground. When the solenoid is commanded

ON the TCM is switching the solenoid to ground.

•There are two tests of the LSD: When the engine

is cranked (DTC82) and when the ignition is

turned ON (DTC32).

•When the ignition is turned ON, and before the

engine is cranked, the TCM activates the shift

solenoids (A, B and Band) to check for short

circuits or open circuits. To do so the gear is set

to 4th, 3rd, 1st, 1st with band apply, 4th with no

HSD. Each one of the 5 tests requires 0.15

second. If the engine is cranked before the end of

all tests, the remaining tests are not done.

Diagnostic Aids:

•This Diagnostic is an electrical test done by the

TCM.

•Detection conditions:

1The solenoid low side connected to TCM

terminal A3 is shorted to ground or open.

2The test is only done when ignition is ON.

3Engine Speed < 480 RPM (not cranked) and

Output Speed = 0 RPM.

4The conditions need to be present for 0.15 to

0.88 second after ignition switch ON.

•Action after the detection time: BACKUP MODE.

•Recovery conditions: To recover, do an IGNITION

CYCLE.

SHIFT

SOLENOID

SHIFT

SOLENOID

BAND

APPLY

SOLENOID

AUTOMATIC

TRANSMISSION

M-7

1(A)

4(C)

C-96 BRN/BLK H-23

H-23

BRN/WHT

H-25

BLK BLK

BLK

A3(3)

C-95

C12(12)

C1(1)

D1(17)

SHIFT

SOLENOID B

CONTROL

GROUND

TRANSMISSION

CONTROL

MODULE (TCM)

GROUND BRN/BLK

BRN/WHT

D07LW012

DIAGNOSTIC TROUBLE CODE (DTC) 32

SOLENOID B SHORT TO GROUND OR OPEN

YES

NO YES NO

YES NO

•Ignition switch OFF.

•Disconnect Transmission Control Module (TCM)

connector C-95 and C-96.

•Connect ohmmeter between connector C-95 terminal

C12 and connector C-96 terminal A3.

IF: Display between 17.5 and 18.5 ohms?

•Connect ohmmeter between connector C-96

terminal A3 and connector C-95 terminal C1

(TCM ground).

IF: Short circuit:

Check for an open circuit between connector C-

96 terminal A3 and connector C-95 terminal C1.

IF: Wiring problem?

The problem is intermittent.

GOTO INTERMITTENT

CONDITIONS.

The problems is

intermittent.

GOTO INTERMITTENT

CONDITIONS.

Replace the

solenoid B.

•Check for faulty connector or

wiring between terminal A3

and ground.

Repair. •Disconnect solenoid B connector.

IF: Ohmmeter displays between 17.5 and 18.5

ohms on the solenoid B terminals:

Repair.

DIAGNOSTIC TROUBLE CODE (DTC) 33

TCC HIGH SHORT TO PLUS OR OPEN

This DTC flashes the CHECK TRANS indicator and

does NOT set the BACKUP MODE.

Circuit Description:

•The Torque Converter Clutch (TCC) solenoid is a

simple ON/OFF solenoid connected to the

adapter case valve body. When the solenoid is

energized by the Transmission Control Module

(TCM), it opens a fluid port. When the port is

open, line pressure actuates the converter clutch

control valve which engages the torque converter

clutch by exhausting the fluid. The TCM engages

the torque converter clutch only when all of the

following conditions exist:

1The transmission is at operating temperature.

2The brake pedal is released.

3The transmission is operating in second, third

or fourth gear.

4The engine is warm (more than 70°C).

5The shift pattern requests TCC apply.

6Shift finished.

7No malfunction which will disable the TCC:

DTC43, DTC55 (only short to ground).

•The solenoid is activated by a current. This

current is produced by applying a voltage to one

side (the High side) and a ground to the other

side (Low side).

•The High Side Driver (HSD) is a circuit of the TCM

that acts as a switch between the solenoid and

the supply voltage. The High side of the TCC

solenoid is used to turn the TCC ON or OFF

because the Low side is permanently connected

to the ground of the transmission. In BACKUP

MODE or when ignition is turned OFF the TCC

High Side is turned OFF.

•The TCM continually monitors the solenoid

connection to its High Side Driver for either low

or high voltage.

•There is only one test of the HSD for TCC: when

the engine is cranked and the TCC is turned ON.

•If this circuit is shorted to plus, the TCC solenoid

is constantly commanded ON (shifts can be firm).

In 1st gear the TCC is hydraulically OFF, whatever

the TCC solenoid position. This means that the

car can be driven even with the TCC shorted to

voltage. The engine could stall when the driver is

braking strongly, if the car is stopped when the

transmission is still in second gear with TCC

applied.

Note: The 3-2 shifts are very firm.

Diagnostic Aids:

•This diagnostic is an electrical test done by the

TCM.

•Detection conditions:

1The solenoid high side connected to TCM

terminal C7 is shorted to voltage or open.

2The condition needs to be present for 0.13

second.

•Action after the detection time:

1TCC is turned OFF.

2CHECK TRANS indicator turned ON.

•Recovery conditions: To recover, do an IGNITION

CYCLE.

TORQUE

CONVERTER

CLUTCH

SOLENOID

CONTROL

TRANSMISSION

CONTROL

MODULE (TCM)

AUTOMATIC

TRANSMISSION

M-6

4(A)

C-95

TORQUE

CONVERTER

CLUTCH

SOLENOID

H-23

RED/YEL

BLK BLK

BLK

H-25

C1(1)

D1(17)

C7(7) RED/YEL

D07LW013

IF you have a SCAN TOOL: TECH2?

Without TECH2 you can not do preliminary test.

YES NO

DIAGNOSTIC TROUBLE CODE (DTC) 33

TCC HIGH SHORT TO PLUS OR OPEN

CONTINUED ON

YES YESNO NO

TCC: Torque Converter Clutch

TCM: Transmission Control Module

SHORT TO PLUS?

•Ignition switch ON. Engine OFF.

•Connect a voltmeter between

connector C-95 terminal C7 and car

ground or with TCM ground

terminal C1.

IF: voltage found:

SHORT TO PLUS?

•Ignition switch ON. Engine OFF.

•Connect a voltmeter between

connector C-95 terminal C7 and car

ground or with TCM ground

terminal C1.

IF: voltage found:

CASE: SLIP > 20 RPM with

TCC = ON

The TCC is shorted to voltage.

•Check wire for a short to voltage between

terminal C7 and solenoid.

Note: This short can be to another wire of the

adapter case connector M-6.

In this case the problem occurs only when

voltage is present at the second wire.

•Repair.

CASE: SLIP = 0+ OR -10 RPM

with TCC = OFF at any TPS:

This means that the TCC valve

is stuck ON or TCC solenoid is

shorted to plus.

This means that the TCC valve

is stuck OFF or the TCC

solenoid connections are

OPEN.

REPLACE TCM

•Install scan tool: TECH2 GOTHROUGH TECH2 CONNECTION.

While driving the car in 2nd, 3rd or 4th gear check if the TCC is

slipping or not when the TCC solenoid is commanded OFF or

ON by the TCM.

Push F0: DATA LIST:

Read TCC state and SLIP value.

CASE: DTC43

GOTO DTC43.

DIAGNOSTIC TROUBLE CODE (DTC) 33

TCC HIGH SHORT TO PLUS OR OPEN

(CONTINUED)

CONTINUED FROM

TCC: Torque Converter Clutch

TCM: Transmission Control Module

YES

YES NO

NOYES

•Wire between connector C-95 terminal C7 and

adapter case connector is open or shorted to

another wire.

•Repair.

•Wire between adapter case connector and

solenoid is open.

•Or wire between transmission (ground) and

solenoid is open.

•Repair.

•Disconnect solenoid connector.

•Connect ohmmeter between the two solenoid

terminals.

IF: Display is between 17.5 and 18.5 ohms.

•Disconnect transmission adapter case connector M-6.

•Connect ohmmeter between terminal 4(A) of female half of

connector and transmission which is used as ground.

IF: Display between 17.5 and 18.5 ohms:

REPLACE TCM

Replace torque converter

clutch solenoid.

OPEN?

•Ignition switch OFF.

•Disconnect TCM connector C-95 and C-96.

•Connect ohmmeter between connector C-95 terminal

C7 and C1 (TCM ground).

IF: Display is between 17.5 and 18.5 ohms.

DIAGNOSTIC TROUBLE CODE (DTC) 34

BAND APPLY SOLENOID SHORT TO GROUND OR OPEN

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

•The band apply solenoid is a normally open

solenoid which controls the flow of fluid for brake

band application. The Transmission Control

Module (TCM) uses Pulse Width Modulation

(PWM) and changes the duty cycle to control the

solenoid. The TCM turns the solenoid ON

(energized) and OFF (de-energized) at a constant

frequency. The length of time the solenoid is

energized during each ON/OFF cycle is called the

pulse width. By varying or “modulating” the

pulse width, the solenoid output pressure is

changed. Since the solenoid is normally closed,

increasing the pulse width increases the duty

cycle and decreases the output pressure. PWM

control provides smooth band application

without an accumulator. The band is only applied

in first and second gears.

•In the event of an electrical failure (open), the

solenoid regulates at the maximum oil flow (0%

duty cycle).

•The solenoid is activated by a current. This

current is produced by applying a voltage to one

side (the High side) and a ground to the other

side (Low side).

•The High Side Driver (HSD) is a circuit of the TCM

that acts as a switch between the solenoids and

the supply voltage. The High side of the solenoid

is permanently supplied with voltage, except in

BACKUP MODE or when Ignition is OFF the HSD

is turned OFF.

•The TCM continually monitors the splenoid

connection to its Low Side Driver (LSD) for either

low or high voltage. The LSD is a circuit of the

TCM that acts as a switch between the solenoid

and ground. When the solenoid is commanded

ON the TCM is switching the solenoid to ground.

•There are two tests of the LSD: when the engine

is cranked (DTC82) and when the ignition is

turned ON (DTC34).

•When the ignition is turned ON, and before the

engine is cranked, the TCM activates the shift

solenoids (A, B and Band) to check for short

circuits or open circuits. To do so the gear is set

to 4th, 3rd, 1st, 1st with band apply, 4th with no

HSD. Each one of the 5 tests requires 0.15

second. If the engine is cranked before the end of

all tests, the remaining tests are not done.

Diagnostic Aids:

•This diagnostic is an electrical test done by the

TCM.

•Detection conditions:

1The solenoid Low side connected to TCM

terminal A9 is shorted to ground or open.

2The test is only done when ignition is ON.

3Engine Speed <480 RPM (not cranked) and

Output Speed = 0 RPM.

4The condition needs to be present for 0.15 to

0.75 second after ignition switch ON.

•Action after the detection time: BACKUP MODE.

•Recovery conditions: To recover, do an IGNITION

CYCLE.

BAND

APPLY

SOLENOID

CONTROL

GROUND

TRANSMISSION

CONTROL

MODULE (TCM)

SHIFT

SOLENOID

SHIFT

SOLENOID

BAND

APPLY

SOLENOID

AUTOMATIC

TRANSMISSION

M-7

2(B)

4(C)

C-96

H-23

BRN/WHT BRN/WHT

YEL/BLK

BLK BLK

BLK

H-25

C1(1)

D1(17)

A9(9)

C-95

C12(12)

GROUND YEL/BLK

D07LW014

•Ignition switch off.

•Disconnect Transmission Control Module (TCM)

connector C-95 and C-96

•Connect ohmmeter between connector C-95 terminal

C12 and connector C-96 terminal A9.

IF: Display is approx. 10 ohms:

•Connect ohmmeter between connector C-96 terminal

A9 and connector C-95 terminal C1 (TCM ground)

IF: Short circuit:

•Check for an open circuit between connector C-96

terminal A9 and connector C-95 terminal C12.

IF: Wiring problem?

•Disconnect band apply solenoid connector.

IF: Ohmmeter displays approx. 10 ohms on

the band apply solenoid terminals:

The problem is intermittent.

GOTO INTERMITTENT

CONDITIONS.

The problem is intermittent.

GOTO INTERMITTENT

CONDITIONS.

YES

YES NO

DIAGNOSTIC TROUBLE CODE (DTC) 34

BAND APPLY SOLENOID SHORT TO GROUND OR OPEN

•Check for faulty

connector or wiring

between terminal A9

and ground.

•Repair.

Repair.

Replace the band apply solenoid.

YES NO

DIAGNOSTIC TROUBLE CODE (DTC) 35

FORCE MOTOR OPEN OR SHORT TO PLUS OR GROUND

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

•The force motor solenoid is a device used to

regulate transmission line pressure. The TCM

uses TPS information and vehicle speed infor-

mation to determine the line pressure appro-

priate for a given load. The TCM will regulate the

pressure by applying a varying amperage to the

force motor solenoid. The applied amperage can

vary from 0.1 to 1.1 amp. The TCM then monitors

the amperage at the return line. If the return

amperage is more than 0.2 amp from the

commanded amperage, the DTC is stored.

•The line pressure can vary from less than 50psi to

more than 200 psi. The line pressure varies

inversely to the amount of current. High current

causes low pressure and low current causes high

pressure.

Diagnostic Aids:

•This Diagnostic is an electrical test done by the

TCM.

•Detection conditions:

•The TCM monitors the amperage at the return

line. When the return amperage is more than 0.2

amp from the commanded amperage, DTC is

stored.

•Action after the detection time: BACKUP MODE

•Recovery conditions: To recover, do an IGNITION

CYCLE.

FORCE

MOTOR

SOLENOID

CONTROL

(+)

TRANSMISSION

CONTROL

MODULE (TCM)

ECM MAIN RELAY

M-6

2(B)

1(E)

C-95

FORCE

MOTOR

SOLENOID

FORCE

MOTOR

SOLENOID

CONTROL

(—)RED/GRN RED/GRN

H-23

RED/BLK

BLK

BLK BLK

H-25

C16(16)

C1(1)

D1(17)

C15(15)

GROUND

C-96 RED/BLU RED/BLU

IGNITION

INPUT A7(7)

AUTOMATIC

TRANSMISSION

RED/BLK

D07LW015

•Ignition switch off.

•Disconnect Transmission Control Module (TCM)

connector C-95 and C-96

•Connect ohmmeter between connector C-95

terminals C15 and C16.

IF: Display is between 3.7 and 4.7 ohms:

•Connect ohmmeter between connector C-95

terminals C15 and C1 (TCM ground) then between

terminal C15 and connecter C-96 terminal A7 (TCM

ignition) then between terminals C16 and C1 (TCM

ground) then between terminals C16 and A7 (TCM

ignition).

IF: Display indicates a short circuit:

•Disconnect automatic transmission adapter case

connector M-6.

•Connect ohmmeter between terminals 2(B) and 1(E)

of female half of the connector (solenoid side).

IF: Display between 3.7 and 4.7 ohms:

Repair wires for open between

terminals C15 or C16 and adapter

case connector.

Replace force motor solenoid.

Repair the short circuit. The problem is

intermittent.

GOTO INTERMITTENT

CONDITIONS. •Disconnect solenoid connector.

•Connect ohmmeter between solenoid

terminals.

IF: Display between 3.7 and 4.7 ohms:

Repair wires for open

between adapter case

connector and solenoid

connector.

YES NO

DIAGNOSTIC TROUBLE CODE (DTC) 35

FORCE MOTOR OPEN OR SHORT TO PLUS OR GROUND

NOYES

YES NO

DIAGNOSTIC TROUBLE CODE (DTC) 36

SHIFT HIGH SHORT TO GROUND OR OPEN

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

•The solenoids are activated by a current. This

current is produced by applying a voltage to one

side (the High side) and a ground to the other

side (Low side).

•The High Side Driver (HSD) is a circuit of the

Transmission Control Module (TCM) that acts as

a switch between the solenoids and the supply

voltage. The High side of the solenoid is

permanently supplied with voltage, except in

BACKUP MODE or when Ignition is OFF the High

Side Driver is turned OFF.

•The TCM continually monitors the solenoid

connection to its High Side Driver for either low

or high voltage.

•There are two tests of the HSD: when the engine

is cranked (DTC82) and when the ignition is

turned ON (DTC36).

•When the ignition is turned ON, and before the

engine is cranked, the TCM activates the shift

solenoids (A, B and Band) to check for short

circuits or open circuits. To do so the gear is set

to 4th, 3rd, 1st, 1st with band apply, 4th with no

HSD. Each one of the 5 tests requires 0.15

seconds. If the engine is cranked before the end

of all tests, the remaining tests are not done.

Diagnostic Aids:

•This diagnostic is an electrical test done by the

TCM.

•Detection conditions:

1The solenoid High side connected to TCM

terminal C12 is shorted to ground or open.

2The test is only done when ignition is ON.

3Engine Speed < 480 RPM (not cranked) and

Output Speed = 0 RPM

4The condition needs to be present for 0.15 to

0.75 second after ignition switch ON.

•Action after the detection time: BACKUP MODE.

•Recovery conditions: To recover, do an IGNITION

CYCLE.

TRANSMISSION

CONTROL

MODULE (TCM)

SHIFT

SOLENOID

SHIFT

SOLENOID

BAND

APPLY

SOLENOID

AUTOMATIC

TRANSMISSION

M-7

3(D)

4(C)

BRN/WHT

YEL/GRN 1(A)

BRN/BLK

H-23

YEL/BLK YEL/BLK

2(B) M-7

H-25

BLK BLK

C12(12) 14

D1(17)

GROUND C1(1)

A2(2)

A3(3)

A9(9)

C-96

C-95

GROUND

SHIFT &

BAND APPLY

SOLENOID

CONTROL

BLK

YEL/GRN

BRN/BLK

BRN/WHT

D07LW016

•Connect ohmmeter between connector C-95 terminal

C12 and C1 (TCM ground).

IF: Short circuit:

•Check for faulty connector or

wiring between terminal C12

and ground.

•Repair.

The problem is intermittent.

GOTO INTERMITTENT CONDITIONS.

The problem is intermittent.

GOTO INTERMITTENT

CONDITIONS.

YES

DIAGNOSTIC TROUBLE CODE (DTC) 36

SHIFT HIGH SHORT TO GROUND OR OPEN

YES NO NO

•Ignition switch off.

•Disconnect Transmission Control Module (TCM)

connectors C-95 and C-96.

•Connect ohmmeter between connector C-95 terminal

C12 and connector C-96 terminal A2 and between

C12 and A3 and between C12 and A9.

IF: Display is approx. 10 ohms for the band apply and 18

ohms for the other solenoids:

Repair.

•Check for an open circuit between connector C-95

terminal C12 and the other terminals A2, A3 and A9.

IF: Wiring problem?

DIAGNOSTIC TROUBLE CODE (DTC) 37

TORQUE MANAGEMENT SERIAL LINE FAULTY

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

•Torque Management is a function that decreases

the engine torque during transmission shifts. To

do so the Transmission Control Module (TCM)

exchanges information on a wire with the Engine

Control Module (ECM) that governs the Engine.

This wire is the Data Link Connector which is also

used by the Scan tool to communicate with the

TCM and the ECM.

Diagnostic Aids:

•This Diagnostic is not an electrical test done by

the TCM but a test between different information

(“logic test”).

•Detection conditions:

1Torque control failure detected

2Each time a shift occurs with the Torque

Management active, the TCM sends a

message to the ECM. If the ECM does not

acknowledge this message, the DTC is stored.

•Action after the detection time: BACKUP MODE

•Recovery conditions: To recover, do an IGNITION

CYCLE.

NOTE:

1When connecting the TECH2 to the data link

connector, be sure to turn off the ignition

switch.

2Since the torque management exchanges

information between the TCM and the ECM at

all times, the DTC37 is sometimes detects in

the following condition.

However, this is not an abnormal condition.

•When the engine stops while driving and

then it is restarted.

•When the battery voltage goes down

excessively and the engine does not start

again.

When DTC37 is detected in the above

conditions, turn off the ignition switch, correct

the abnormal condition and erase the trouble

code.

SERIAL DATA

TRANSMISSION

CONTROL

MODULE (TCM)

ENGINE

CONTROL

MODULE

(ECM)

C-95

C8(8)

E-61

35 C2

YEL YEL

YEL

C-102C-102C-102

C-102

91116

DATA LINK

CONNECTOR

BLK

YEL/BLK

GRN

FUSE (EB-12)

D16(32)

DIAGNOSIS

INPUT

C-1025

D07LW017

YES NO

DIAGNOSTIC TROUBLE CODE (DTC) 37

TORQUE MANAGEMENT SERIAL LINE FAULTY

•Peform TECH2 SELF-TEST GOTHROUGH TECH2

CONNECTION.

IF: TECH2 OK:

•Ignition switch OFF.

•Disconnect TECH2.

•Connect ohmmeter between connector C-102 terminal

4 or 5 and ground.

IF: Display approx. 0 ohms :

•Ignition switch ON.

•Connect voltmeter between connector C-102 terminal

16 and 4 or 5.

IF: Display battery voltage:

•Ignition switch OFF.

•Connect ohmmeter between connector C-102 terminal

9 and ECM connector E-61 terminal 35.

•Then connect ohmmeter between TCM connector C-95

terminal C8 and ECM connector E-61 terminal 35.

IF: Display approx. 0 ohms:

•Check for short between connector C-102 terminal 9

and ground and between connector C-102 terminal 9

and B+.

IF OK, REPLACE TCM

See TECH2 OPERATOR’S MANUAL.

Check wire for open.

Check Engine Control Module (ECM)

and wire to ECM and wire to battery

and data link connector C-102.

Check wire for open.

DIAGNOSTIC TROUBLE CODE (DTC) 41

SOLENOID A SHORT TO PLUS

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

•The solenoid A is a simple ON/OFF solenoid

located in the main case valve body. The

solenoid is the normally closed-type. In second or

third gear the Transmission Control Module

(TCM) energizes the solenoid to open a fluid inlet

port. When the port is open, fluid pressure

actuates the shift valve.

•The solenoid is activated by a current. This

current is produced by applying a voltage to one

side (the High side) and a ground to the other

side (Low side).

•The High Side Driver (HSD) is a circuit of the TCM

that acts as a switch between the solenoids and

the supply voltage. The High side of the solenoid

is permanently supplied with voltage, except in

BACKUP MODE or when ignition is OFF the HSD

is turned OFF.

•The TCM continually monitors the solenoid

connection to its Low Side Driver (LSD) for either

low or high voltage. The LSD is a circuit of the

TCM that acts as a switch between the solenoid

and ground. When the solenoid is commanded

ON the TCM is switching the solenoid to ground.

•There are two tests of the LSD: when the engine

is cranked (DTC82) and when the ignition is

turned ON (DTC41).

•When the ignition is turned ON, and before the

engine is cranked, the TCM activates the shift

solenoids (A, B and Band) to check for short

circuits or open circuits. To do so the gear is set

to 4th, 3rd, 1st, 1st with band apply, 4th with no

HSD. Each one of the 5 tests requires 0.15

second. If the engine is cranked before the end of

all tests, the remaining tests are not done.

Diagnostic Aids:

•This diagnostic is an electrical test done by the

TCM.

•Detection conditions:

1The solenoid Low side connected to TCM

terminal A2 is shorted to plus.

2The test is only done when ignition is ON.

3Engine Speed < 480 RPM (not cranked) and

Output Speed = 0 RPM.

4The condition needs to be present for 0.15 to

0.88 second after ignition switch ON.

•Action after the detection time: BACKUP MODE.

•Recovery conditions: To recover, do an IGNITION

CYCLE.

TRANSMISSION

CONTROL

MODULE (TCM)

SHIFT

SOLENOID

SHIFT

SOLENOID

BAND

APPLY

SOLENOID

AUTOMATIC

TRANSMISSION

M-7

3(D)

4(C)

BRN/WHT

YEL/GRN YEL/GRN 1(A)

BRN/BLK

H-23

YEL/BLK YEL/BLK

2(B) M-7

C12(12) 14

A2(2)

A3(3)

A9(9)

SHIFT &

BAND APPLY

SOLENOID

CONTROL

C-95

RED/BLU RED/BLU

GRN

A7(7)

A4(4) BATTERY

ECM MAIN RELAY

BATTERY

INPUT

IGNITION

INPUT

C-96

GROUND

BRN/WHT

BRN/BLK

D07LW018

DIAGNOSTIC TROUBLE CODE (DTC) 41

SOLENOID A SHORT TO PLUS

•Ignition switch OFF.

•Disconnect Transmission Control Module (TCM)

connectors C-95 and C-96.

•Connect ohmmeter between connector C-96

terminals A2 and A7 (TCM ignition) then between A2

and A4 (TCM battery) then between A2 and C12.

IF: Short circuit:

YES

•Check for faulty connector or wiring between

terminal A2 and the shorted terminal.

•Repair.

The problem is intermittent.

GOTO INTERMITTENT

CONDITIONS.

Repair.

YES

•Connect ohmmeter between A2 and A3 then between

A2 and A9.

IF: Short circuit:

DIAGNOSTIC TROUBLE CODE (DTC) 42

SOLENOID B SHORT TO PLUS

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

•The solenoid B is a simple ON/OFF solenoid

located in the main case valve body. The

solenoid is the normally open-type. When the

port is open, fluid pressure actuates the shift

valve. In first or second gear the Transmission

Control Module (TCM) energizes the solenoid to

close a fluid inlet port.

•The solenoid is activated by a current. This

current is produced by applying a voltage to one

side (the High side) and a ground to the other

side (Low side).

•The High Side Driver (HSD) is a circuit of the TCM

that acts as a switch between the solenoids and

the supply voltage. The High side of the solenoid

is permanently supplied with voltage, except in

BACKUP MODE or when ignition is OFF the HSD

is turned OFF.

•The TCM continually monitors the solenoid

connection to its Low Side Driver (LSD) for either

low or high voltage. The LSD is a circuit of the

TCM that acts as a switch between the solenoid

and ground. When the solenoid is commanded

ON the TCM is switching the solenoid to ground.

•There are two tests of the LSD: when the engine

is cranked (DTC82) and when the ignition is

turned ON (DTC42).

•When the ignition is turned ON, and before the

engine is cranked, the TCM activates the shift

solenoids (A, B and Band) to check for short

circuits or open circuits. To do so the gear is set

to 4th, 3rd, 1st, 1st with band apply, 4th with no

HSD. Each one of the 5 tests requires 0.15

second. If the engine is cranked before the end of

all tests, the remaining tests are not done.

Diagnostic Aids:

•This diagnostic is an electrical test done by the

TCM.

•Detection conditions:

1The solenoid Low side connected to TCM

terminal A3 shorted to plus.

2The test is only done when ignition is ON.

3Engine Speed < 480 RPM (not cranked) and

Output Speed = 0 RPM.

4The condition needs to be present for 0.15 to

1.03 second after ignition switch ON.

•Action after the detection time: BACKUP MODE.

•Recovery conditions: To recover, do an IGNITION

CYCLE.

TRANSMISSION

CONTROL

MODULE (TCM)

SHIFT

SOLENOID

SHIFT

SOLENOID

BAND

APPLY

SOLENOID

AUTOMATIC

TRANSMISSION

M-7

3(D)

4(C)

BRN/WHT

YEL/GRN YEL/GRN 1(A)

BRN/BLK

H-23

YEL/BLK YEL/BLK

2(B) M-7

C12(12) 14

A2(2)

A3(3)

A9(9)

SHIFT &

BAND APPLY

SOLENOID

CONTROL

C-95

RED/BLU RED/BLU

GRN

A7(7)

A4(4) BATTERY

ECM MAIN RELAY

BATTERY

INPUT

IGNITION

INPUT

C-96

GROUND

BRN/WHT

BRN/BLK

D07LW018

DIAGNOSTIC TROUBLE CODE (DTC) 42

SOLENOID B SHORT TO PLUS

•Ignition switch OFF.

•Disconnect Transmission Control Module (TCM)

connectors C-95 and C-96.

•Connect ohmmeter between connector C-96

terminals A3 and A7 (TCM ignition) then between A3

and A4 (TCM battery) then between A3 and C12.

IF: Short circuit:

YES

•Check for faulty connector or wiring between

terminal A3 and the shorted terminal.

•Repair.

•Connect ohmmeter between A3 and A2 then between

A3 and A9.

IF: Short circuit:

YES

Repair. The problem is intermittent.

GOTO INTERMITTENT

CONDITIONS.

DIAGNOSTIC TROUBLE CODE (DTC) 43

TCC HIGH SHORT TO GROUND

This DTC does NOT flash the CHECK TRANS

indicator and does NOT set the BACKUP MODE.

Circuit Description:

•The Torque Converter Clutch (TCC) solenoid is a

simple ON/OFF solenoid connected to the

adapter case valve body. When the solenoid is

energized by the Transmission Control Module

(TCM), it opens a fluid port. When the port is

open, line pressure actuates the converter clutch

control valve which engages the torque converter

clutch by exhausting the fluid. The TCM engages

the torque converter clutch only when all of the

following conditions exist:

1The transmission is at operating temperature.

2The brake pedal is released.

3The transmission is operating in second, third

or fourth gear.

4The engine is warm (more than 70°C).

5The shift pattern requests TCC apply.

6Shift finished.

7No malfunction which will disable the TCC:

DTC33, DTC55 (only short to ground).

•The solenoid is activated by a current. This

current is produced by applying a voltage to one

side (the High side) and a ground to the other

side (Low side).

•The High Side Driver (HSD) is a circuit of the TCM

that acts as a switch between the solenoid and

the supply voltage. The High side of the TCC

solenoid is used to turn the TCC ON or OFF

because the Low side is permanently connected

to the ground of the transmission. In BACKUP

MODE or when ignition OFF the TCC High Side is

turned OFF.

•The TCM continually monitors the solenoid

connection of to its High Side Driver for either

low or high voltage.

•There is only one test of the HSD for TCC: when

the engine is cranked and the TCC is turned ON.

Diagnostic Aids:

•This diagnostic is an electrical test done by the

TCM.

•Detection conditions:

1The solenoid High side connected to TCM

terminal C7 is shorted to ground.

2The condition needs to be present for 0.07

seconds after ignition switch ON.

•Action after the detection time: TCC is turned

OFF.

•Recovery conditions: To recover, do an IGNITION

CYCLE.

TORQUE

CONVERTER

CLUTCH

SOLENOID

CONTROL

TRANSMISSION

CONTROL

MODULE (TCM)

AUTOMATIC

TRANSMISSION

M-6

4(A)

C-95

TORQUE

CONVERTER

CLUTCH

SOLENOID

H-23

RED/YEL

BLK BLK

BLK

H-25

C1(1)

D1(17)

C7(7) RED/YEL

D07LW013

DIAGNOSTIC TROUBLE CODE (DTC) 43

TCC HIGH SHORT TO GROUND

SHORT TO GROUND?

•Ignition switch OFF. Engine OFF.

•Disconnect Transmission Control Module (TCM)

connectors C-95 and C-96.

•Connect a ohmmeter between connector C-95

terminal C7 and car ground or with TCM ground

terminal C1.

IF: Short circuit:

YES

•Install scan tool: TECH2 GOTHROUGH TECH2 CONNECTION.

While driving the car in 2nd, 3rd or 4th gear check if the TCC is

slipping or not when the TCC solenoid is commanded ON by

the TCM.

Push F0: DATA LIST:

Read TCC state and SLIP value.

IF you have a SCAN TOOL: TECH2 ?

Without TECH2 you can not do preliminary test.

CASE: DTC 33

GOTO DTC33.

The problem is intermittent.

GOTO INTERMITTENT CONDITIONS.

The TCC is shorted to ground.

•Check wiring between

terminal C7 and ground.

•Repair.

CASE: SLIP > 20 RPM with

TCC = ON

This means that the TCC valve

is stuck OFF or the TCC

solenoid connections are

shorted to ground.

TCC: Torque Converter Clutch

TCM: Transmission Control Module

DIAGNOSTIC TROUBLE CODE (DTC) 44

BAND APPLY SOLENOID SHORT TO PLUS

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

•The band apply solenoid is a normally open

solenoid which controls the flow of fluid for brake

band application. The Transmission Control

Module (TCM) uses Pulse Width Modulation

(PWM) and changes the duty cycle to control the

solenoid. The TCM turns the solenoid ON

(energized) and OFF (de-energized) at a constant

frequency. The length of time the solenoid is

energized during each ON/OFF cycle is called the

pulse width. By varying or “modulating” the

pulse width, the solenoid output pressure is

changed. Since the solenoid is normally closed,

increasing the pulse width increases the duty

cycle and decreases the output pressure. PWM

control provides smooth band application

without an accumulator. The band is only applied

in first and second gears.

•In the event of an electrical failure (open), the

solenoid regulates at the maximum oil flow (0%

duty cycle).

•The solenoid is activated by a current. This

current is produced by applying a voltage to one

side (the High side) and a ground to the other

side (Low side).

•The High Side Driver (HSD) is a circuit of the TCM

that acts as a switch between the solenoids and

the supply voltage. The High side of the solenoid

is permanently supplied with voltage, except in

BACKUP MODE or when ignition is OFF the HSD

is turned OFF.

•The TCM continually monitors the solenoid

connection to its Low Side Driver (LSD) for either

low or high voltage. The LSD is a circuit of the

TCM that acts as a switch between the solenoid

and ground. When the solenoid is commanded

ON the TCM is switching the solenoid to ground.

•There are two tests of the LSD: when the engine

is cranked (DTC82) and when the ignition is

turned ON (DTC44).

•When the ignition is turned ON, and before the

engine is cranked, the TCM activates the shift

solenoids (A, B and Band) to check for short

circuits or open circuits. To do so the gear is set

to 4th, 3rd, 1st, 1st with band apply, 4th with no

HSD. Each one of the 5 tests requires 0.15

second. If the engine is cranked before the end of

all tests, the remaining tests are not done.

Diagnostic Aids:

•This diagnostic is an electrical test done by the

TCM.

•Detection conditions:

1The solenoid Low side connected to TCM

terminal A9 is shorted to voltage.

2The test is only done when ignition is ON.

3Engine Speed < 480 RPM (not cranked) and

Output Speed = 0 RPM.

4The condition needs to be present for 0.15 to

1.18 second after ignition switch ON.

•Action after the detection time: BACKUP MODE.

•Recovery conditions: To recover, do an IGNITION

CYCLE.

TRANSMISSION

CONTROL

MODULE (TCM)

SHIFT

SOLENOID

SHIFT

SOLENOID

BAND

APPLY

SOLENOID

AUTOMATIC

TRANSMISSION

M-7

3(D)

4(C)

BRN/WHT

YEL/GRN YEL/GRN 1(A)

BRN/BLK

H-23

YEL/BLK YEL/BLK

2(B) M-7

C12(12) 14

A2(2)

A3(3)

A9(9)

SHIFT &

BAND APPLY

SOLENOID

CONTROL

C-95

RED/BLU RED/BLU

GRN

A7(7)

A4(4) BATTERY

ECM MAIN RELAY

BATTERY

INPUT

IGNITION

INPUT

C-96

GROUND

BRN/WHT

BRN/BLK

D07LW018

DIAGNOSTIC TROUBLE CODE (DTC) 44

BAND APPLY SOLENOID SHORT TO PLUS

•Ignition switch OFF.

•Disconnect Transmission Control Module (TCM)

connectors C-95 and C-96.

•Connect ohmmeter between connector C-96

terminals A9 and A7 (TCM ignition) then between A9

and A4 (TCM battery) then between A9 and C12.

IF: Short circuit:

YES

•Check for faulty connector or wiring between

terminal A9 and the shorted terminal.

Repair.

•Connect ohmmeter between A9 and A2 then

between A9 and A3.

IF: Short circuit:

YES NO

Repair. The problem is intermittent.

GOTO INTERMITTENT

CONDITIONS.

DIAGNOSTIC TROUBLE CODE (DTC) 46

SHIFT HIGH SHORT TO PLUS

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

•The solenoids are activated by a current. This

current is produced by applying a voltage to one

side (the High side) and a ground to the other

side (Low side).

•The High Side Driver (HSD) is a circuit of the

Transmission Control Module (TCM) that acts as

a switch between the solenoids and the supply

voltage. The High side of the solenoid is per-

manently supplied with voltage, except in

BACKUP MODE or when ignition is OFF the High

Side Driver is turned OFF.

•The TCM continually monitors the solenoid

connection to its High Side Driver for either low

or high voltage.

•There are two tests of the HSD: when the engine

is cranked (DTC82) and when the ignition is

turned ON (DTC46).

•When the ignition is turned ON, and before the

engine is cranked, the TCM activates the shift

solenoids (A, B and Band) to check for short

circuits or open circuits. To do so the gear is set

to 4th, 3rd, 1st, 1st with band apply, 4th with no

HSD. Each one of the 5 tests requires 0.15

second. If the engine is cranked before the end of

all tests, the remaining tests are not done.

Diagnostic Aids:

•This diagnostic is an electrical test done by the

TCM.

•Detection conditions:

1The solenoid High side connected to TCM

terminal C12 is shorted to voltage.

2The test is only done when ignition is ON.

3Engine Speed < 480 RPM (not cranked) and

Output Speed = 0 RPM.

4The condition needs to be present for 0.15 to

1.34 second after ignition switch ON.

•Action after the detection time: BACKUP MODE.

•Recovery conditions: To recover, do an IGNITION

CYCLE.

TRANSMISSION

CONTROL

MODULE (TCM)

SHIFT

SOLENOID

SHIFT

SOLENOID

BAND

APPLY

SOLENOID

AUTOMATIC

TRANSMISSION

M-7

3(D)

4(C)

BRN/WHT

YEL/GRN YEL/GRN 1(A)

BRN/BLK

H-23

YEL/BLK YEL/BLK

2(B) M-7

C12(12) 14

A2(2)

A3(3)

A9(9)

SHIFT &

BAND APPLY

SOLENOID

CONTROL

C-95

RED/BLU RED/BLU

GRN

A7(7)

A4(4) BATTERY

ECM MAIN RELAY

BATTERY

INPUT

IGNITION

INPUT

C-96

GROUND

BRN/WHT

BRN/BLK

D07LW018

•Ignition switch OFF.

•Disconnect Transmission Control Module (TCM)

connectors C-95 and C-96.

•Connect ohmmeter between connector C-95 terminal

C12 and connector C-96 terminal A7 (TCM ignition)

then between C12 and A4 (TCM battery).

IF: Short circuit:

YES

•Check for faulty connector or wiring between

terminal C12 and the shorted terminal.

Repair.

The problem is intermittent.

GOTO INTERMITTENT CONDITIONS.

DIAGNOSTIC TROUBLE CODE (DTC) 46

SHIFT HIGH SHORT TO PLUS

DIAGNOSTIC TROUBLE CODE (DTC) 51

ENGINE COOLANT SWITCH SHORT TO GROUND, PLUS OR OPEN

This DTC does NOT flash the CHECK TRANS

indicator and does NOT set the BACKUP MODE.

Circuit Description:

•The Engine Coolant Temperature is measured by

a sensor in the coolant system. This information

is used by the Engine Control Module (ECM) for

the engine. The ECM provides the information:

Engine Warm to the Transmission Control

Module (TCM) when the ECM measures a

temperature higher than 70°C (158°F).

•The information is provided using a wire

between the ECM terminal 10 and the TCM

terminal D14. When the engine is warm the ECM

connects its terminal 10 to ground using a Low

Side Driver. When the engine is Cold the ECM

lets this wire open and the TCM pulls it up to 5

volts.

•When Ignition is ON and Engine is OFF: the ECM

always sends the information “engine cold” even

if the engine is warm. The information is valid

only when the engine is ON.

Diagnostic Aids:

•This Diagnostic is not an electrical test done by

the TCM but a test between different information

(“logic test”).

•Detection conditions of engine always cold:

1Engine seen as cold: wire short to voltage or

open.

2Transmission Oil Temperature >150°C (302°F)

or more than 20 minutes since last ignition

cycle.

3Detection conditions need to be present for at

least 25 seconds.

•Detection conditions of engine always warm:

1Engine seen as warm: wire short to ground.

2Transmission Oil Temperature < 0°C (32°F).

3Without problem on Transmission Tem-

perature sensor then: voltage on A/T Oil

Temperature sensor <4.74 V.

4Detection conditions need to be present for at

least 6 seconds.

•Action after the detection time: No action.

•Recovery conditions: To recover, Engine Coolant

Temperature change information need to be

present for more than 6 seconds.

ENGINE

COOLANT

TEMPERATURE

INPUT

TRANSMISSION

CONTROL

MODULE (TCM)

C-95

ENGINE

COOLANT

TEMPERATURE

OUTPUT

ENGINE

CONTROL

MODULE (ECM)

E-61

H-25

BRN BRN

H-25

BLK BLK

BLK

C1(1)

D1(17)

GROUND

D14(30)

D07LW019

DIAGNOSTIC TROUBLE CODE (DTC) 51

ENGINE COOLANT SWITCH SHORT TO GROUND, PLUS OR OPEN

IF: You see a problem:

•This DTC can be set when there is no problem at

all. This is due to the fact that when the engine

stalls the ignition is still ON then Engine Control

Module (ECM) provides a false information:

engine cold. The Transmission Control Module

(TCM), knowing that the last ignition cycle

happened more than 20 minutes ago, then sets

DTC51.

•Using the Scan Tool you can check with TECH2:

F0: ENG. TEMP. SW information. When the

engine is cold or when the engine is OFF the

TECH2 should show: COLD. When the engine is

warm the TECH2 should show WARM.

•This DTC is not very important. In the worst case

it would not allow the Torque Converter Clutch

(TCC) to be applied. This will cause low fuel

economy.

YES

•Check voltage between connector C-95 terminal D14

and connector C-95 terminal C1 (TCM ground).

•Ignition switch ON. Engine ON.

Engine warm.

IF: Voltage higher than 5 volts:

There is not currently a problem.

GOTO INTERMITTENT CONDITIONS.

YES

•There is a short circuit to voltage.

•Repair.

IF: Voltage approx. 5 volts:

YES

•This is an open circuit or the ECM

is not sending the correct

information. See also ECM

information, Section 6E.

•Repair.

•Voltage approx. 0 volts means

that the signal is OK or that

there is a short circuit to

ground.

•Turn the engine OFF with the

ignition ON.

IF: The voltage goes back to 5

volts:

NOYES

There is not currently a

problem.

GOTO INTERMITTENT

CONDITIONS.

•As the voltage is staying at 0

volts, there is a short to

ground.

•Repair.

DIAGNOSTIC TROUBLE CODE (DTC) 52

KICK DOWN ALWAYS ON OR SHORT TO GROUND

This DTC does NOT flash the CHECK TRANS

indicator and does NOT set the BACKUP MODE.

Circuit Description:

•When the driver presses the accelerator pedal

down fully, the kick down switch closes, sending

a ground signal to the Transmission Control

Module (TCM).

•This information is used to do shifts with a high

Engine Speed RPM.

•When the kick down switch is closed the Throttle

Position Sensor (TPS) is already at 100%.

Diagnostic Aids:

•This diagnostic is not an electrical test done by

the TCM but a test between different information

(“logic test”).

•Detection conditions:

1Kick down switch ON (short to ground) and

TPS <70%.

2No malfunction: TPS short to voltage or

ground (DTC21 and DTC22).

3The conditions need to be present for at least

1 second.

•Action after the detection time: Kick Down

information not taken into account.

•Recovery conditions: To recover, Kick Down

needs to be seen as OFF during detection time.

KICK

DOWN

SWITCH

INPUT

TRANSMISSION

CONTROL

MODULE (TCM)

C-96

KICK DOWN

SWITCH

C-94

BLU

BLK BLK

BLK

H-25

C1(1)

C-95

D1(17)

GROUND

BLK

B5(17)

D07LW020

DIAGNOSTIC TROUBLE CODE (DTC) 52

KICK DOWN ALWAYS ON OR SHORT TO GROUND

IF: DTC 23 Throttle Position Sensor (TPS) connector

open too:

YES

GOTO DTC 23.

•Ignition switch ON. Engine OFF.

•Accelerator pedal not depressed.

•Connect a voltmeter between connector C-96

terminal B5 and connector C-95 terminal C1 (TCM

ground).

IF: Display approx. 0 volts:

YES

•Check the wires and connector

and the switch to detect the

short to ground.

•Repair.

The problem is

intermittent. GOTO

INTERMITTENT

CONDITIONS.

DIAGNOSTIC TROUBLE CODE (DTC) 53

MODE SWITCH IN P OR N OR R BAD POSITION

This DTC does NOT flash the CHECK TRANS

indicator and does NOT set the BACKUP MODE.

Circuit Description:

•The mode switch supplies the Transmission

Control Module (TCM) with information regard-

ing the selector lever position: P, R, N, D, 3, 2 or

L. The selector lever position is indicated by the

state of four ON/OFF contacts. The mode switch

is located on one side of the transmission. It is on

the transmission manual shaft and is fixed to the

main case.

•The mode switch is also used to provide the

information P or N to the engine crank wiring.

The engine can be cranked only if connector M-25

terminal 4(H) is connected to terminal 1(E), which

is connected to ground.

•The mode switch is also used to provide the back

up lamp power in reverse. This is the reason why

the mode switch is supplied through a 15A fuse

(CB-11). This fuse can burn due to short circuit in

the back up lamp.

•When this fuse is open, the mode switch does

not work and DTC54 is set.

•The mode position is defined by the shift linkage

which is a link between the shift lever and the

mode switch. A bad adjustment of the shift link-

age can create a mode switch problem (DTC53).

Diagnostic Aids:

•This Diagnostic is not an electrical test done by

the TCM but a test between different information

(“logic test”).

•Detection conditions of P or N bad position:

1A/T Input Speed <3000 RPM

2TPS > 20%

3Mode Switch = P or N

4No malfunction: TPS short to voltage or

ground (DTC 21, DTC22), Engine Speed

(DTC13).

5The conditions need to be present for at least

4 seconds.

•Action after the detection time: Default position

assumed for pressure calculation and shift

pattern = always in D.

•Recovery Conditions: To recover, have the engine

speed higher than 3000 RPM with a TPS higher

than 20% when the mode switch is not in P or N.

•Detection conditions of R bad position:

A/T Output Speed > 3200 RPM (approx. 100 KPH)

2Mode Switch = R

3No malfunction: Output speed (DTC11).

Downshift Protection (DTC62).

4The conditions need to be present for at least

4 seconds.

•Action after the detection time: Default position

assumed for pressure calculation and shift

pattern = always in D.

•Recovery conditions: To recover, have the output

speed higher than 3200 RPM when the mode

switch is not R.

AUTOMATIC

TRANSMISSION

MODE

SWITCH

PIN C

CB-11

15A

7(B)2(F) 6(C)

FUSE BOX

TRANSMISSION CONTROL INPUTS

M-25

5(D)

TRANSMISSION

CONTROL

MODULE (TCM)

3(G)

4123

8(A) M-25

C-95

PIN B PIN A PIN G

WHT

BLU/WHT BLU/RED BLU BLU/BLK

BLU/WHT

RED/YEL BLU/RED BLU BLU/BLK

H-23

D5(21) D6(22) D7(23) D4(20)

PIN F

BACK UP

LAMP

PIN E

1(E)

4(H) M-25

BRN/YEL

STARTER RELAY

BLK

D07LW021

DIAGNOSTIC TROUBLE CODE (DTC) 53

MODE SWITCH IN P OR N OR R BAD POSITION

IF: DTC 23 Throttle Position Sensor (TPS) connector

open or DTC 13 Engine speed, DTC 54 Mode switch

illegal position exists:

YES

GOTO DTC13 or

DTC23 or DTC 54 first.

•Install scan tool GOTHROUGH TECH2 CONNECTION.

•Ignition switch ON. Engine running.

•Selector lever position “P”.

•Select F0: DATALIST: “TOP SIGNAL” or F0: DATA LIST: “AT INPUT SPEED”.

IF: Display does not change with engine speed or TPS:

YES

DTC 23 or DTC 13 not detected

but are the reason for this

DTC 53.

GOTO DTC13 or DTC23.

•Ignition switch ON.

•Select F0: DATALIST: “SELECTOR POS.”.

•Move shift selector lever through all positions

and compare results with table 1.

IF: all selector pin displays correct:

NOYES

The problem is

intermittent. GOTO

INTERMITTENT

CONDITIONS.

•Check automatic transmission mode switch

adjustment. GOTHROUGH MODE SWITCH

SETTING PROCEDURE (PAGE: 7A1-147)

•Repair.

Table 1

Note: “X” indicates TECH2 displays “ACTIVE”.

SHIFT SELECTOR POSITION

TECH1 DISPLAY P R N D 3 2 L

SELECTOR PIN A X X X X

SELECTOR PIN B X X X X

SELECTOR PIN C X X X X

SELECTOR PIN P X X X X

DIAGNOSTIC TROUBLE CODE (DTC) 54

MODE SWITCH ILLEGAL POSITION

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

•The mode switch supplies the Transmission

Control Module (TCM) with information re-

garding the selector lever position: P, R, N, D, 3, 2

or L. The selector lever position is indicated by

the state of four ON/OFF contacts. The mode

switch is located on one side of the transmission.

It is on the transmission manual shaft and is fixed

to the main case.

•The mode switch is also used to provide the

information P or N to the engine crank wiring.

The engine can be cranked only if connector M-25

terminal 4(H) is connected to terminal 1(E), which

is connected to ground.

•The mode switch is also used to provide the back

up lamp power in reverse. This is the reason why

the mode switch is supplied through a 15A fuse

(CB-11). This fuse can burn due to short circuit in

the back up lamp.

•When this fuse is open, the mode switch does

not work and DTC54 is set.

•The mode position is defined by the shift linkage

which is a link between the shift lever and the

mode switch. A bad adjustment of the shift

linkage can create a mode switch problem

(DTC53).

Diagnostic Aids:

•This Diagnostic is an electrical test done by the

TCM.

•Detection conditions:

1Selector Pin A and Pin B and Pin C are not

active: no position is identified then.

2Based upon Table 1, in Park shift selector

position the code is set when Pin A is open or

shorted to ground.

3The conditions need to be present for at least

5 seconds.

•Action after the detection time: BACKUP MODE

•Recovery conditions: To recover, do an IGNITION

CYCLE.

AUTOMATIC

TRANSMISSION

MODE

SWITCH

PIN C

CB-11

15A

7(B)2(F) 6(C)

FUSE BOX

TRANSMISSION CONTROL INPUTS

M-25

5(D)

TRANSMISSION

CONTROL

MODULE (TCM)

3(G)

4123

8(A) M-25

C-95

PIN B PIN A PIN G

WHT

BLU/WHT BLU/RED BLU BLU/BLK

BLU/WHT

RED/YEL BLU/RED BLU BLU/BLK

H-23

D5(21) D6(22) D7(23) D4(20)

PIN F

BACK UP

LAMP

PIN E

1(E)

4(H) M-25

BRN/YEL

STARTER RELAY

BLK

D07LW021

DIAGNOSTIC TROUBLE CODE (DTC) 54

MODE SWITCH ILLEGAL POSITION

Table 1

Note: “X” indicates TECH2 displays “ACTIVE”.

SHIFT SELECTOR POSITION

TECH1 DISPLAY P R N D 3 2 L

SELECTOR PIN A X X X X

SELECTOR PIN B X X X X

SELECTOR PIN C X X X X

SELECTOR PIN P X X X X

•Install scan tool GOTHROUGH TECH2 CONNECTION.

•Ignition switch ON. Engine OFF.

•Selector F0: DATALIST: “SELECTOR POS”.

•Move shift selector lever through all positions and

compare results with Table 1.

IF: all selector pin displays correct:

YES NO

The problem is

intermittent.

GOTO INTERMITTENT

CONDITIONS.

IF: all selector pin displays

incorrect:

YES NO

•Check fuse and wire to connector M-25

terminal 5 (D) for opens.

GOTHROUGH MODE SWITCH SETTING

PROCEDURE (PAGE: 7A1-147).

If problem not solved, replace mode

switch.

•Disconnect mode switch connector M-

25.

•Connect ohmmeter between terminal

5(D) and respectively all terminals of

mode switch connector M-25.

•Move shift selector lever through all

positions and compare results with

Table 1.

IF: One selector pin display is incorrect:

NOYES

•Check the wire and connector.

•Repair. •Check wire to cruise control unit and

Transmission Control Module (TCM).

•Repair.

DIAGNOSTIC TROUBLE CODE (DTC) 55

BRAKE SWITCH SHORT TO GROUND OR OPEN

This DTC does NOT flash the CHECK TRANS

indicator and does NOT set the BACKUP MODE.

Circuit Description:

•The brake switch is a switch on the brake pedal

that is used to provide the information: brakes

are applied. This is used by different features:

cruise control, stop light and Transmission

Control Module (TCM).

•The TCM uses the information (brakes applied)

mainly to release the Torque Converter Clutch

(TCC).

•The brake switch input is constantly connected to

battery when the pedal is pressed. TCM terminal

D9 is connected to Voltage.

•The brake switch input is opened when the pedal

is released. TCM terminal D9 is grounded.

Diagnostic Aids:

•This Diagnostic is not an electrical test done by

the TCM but a test between different information

(“logic test”).

•Detection conditions:

1Brake seen as applied during an acceleration

from less than 10 Km/h to more than 60 Km/h

within 6 seconds.

2After this acceleration the vehicle speed was

higher than 60 Km/h during at least 6

seconds.

3No Malfunction: Output Speed (DTC11).

Downshift Protection (DTC62).

4The conditions need to be present for at least

5 times during an ignition cycle.

•Action after the detection time: No action but, as

the brake is seen as applied, the TCC is never

applied.

•Recovery conditions: To recover, brake has to be

released.

BRAKE SW

INPUT

TRANSMISSION

CONTROL

MODULE (TCM)

C-95

H-25

BLK BLK

BLK

C1(1)

D1(17)

GROUND

D9(25) RED RED GRN

C-44

1FUSE EB-10(10A)

STOP LAMP SW

D07LW022

DIAGNOSTIC TROUBLE CODE (DTC) 55

BRAKE SWITCH SHORT TO GROUND OR OPEN

•Install scan tool GOTHROUGH TECH2 CONNECTION.

•Ignition switch ON. Engine ON.

•Select F0: DATA LIST: “BRAKE SWITCH”.

•Apply brake.

IF: Display is “NOT ACTIVE”:

YES NO

•Check the short circuit

to ground or open.

•Repair.

The problem is

intermittent.

GOTO INTERMITTENT

CONDITIONS.

DIAGNOSTIC TROUBLE CODE (DTC) 56

BRAKE SWITCH SHORT TO PLUS

This DTC does NOT flash the CHECK TRANS

indicator and does NOT set the BACKUP MODE.

Circuit Description:

•The brake switch is a switch on the brake pedal

that is used to provide the information: brakes

are applied. This is used by different features:

cruise control, stop light and Transmission

Control Module (TCM).

•The TCM uses the information (brakes applied)

mainly to release the Torque Converter Clutch

(TCC).

•The brake switch input is constantly connected to

battery when the pedal is pressed. TCM terminal

D9 is connected to Voltage.

•The brake switch input is opened when the pedal

is released. TCM terminal D9 is grounded.

Diagnostic Aids:

•This Diagnostic is not an electrical test done by

the TCM but a test between different information

(“logic test”).

•Detection conditions:

1Brake seen as released during a deceleration

from more than 60 Km/h to less than 10 Km/h

within 6 seconds.

2Before this deceleration the car vehicle speed

was higher than 60 Km/h during at least 6

seconds.

3No Malfunction: Output Speed (DTC11).

Downshift Protection (DTC62).

4The conditions need to be present for at least

5 times during an ignition cycle.

•Action after the detection time: No action but, as

the brake is seen as released, the TCC is applied

even when the brake is applied.

•Recovery conditions: To recover, brake has to be

released.

BRAKE SW

INPUT

TRANSMISSION

CONTROL

MODULE (TCM)

C-95

H-25

BLK BLK

BLK

C1(1)

D1(17)

GROUND

D9(25) RED RED GRN

C-44

1FUSE EB-10(10A)

STOP LAMP SW

D07LW022

•Install scan tool GOTHROUGH TECH2 CONNECTION.

•Ignition switch ON. Engine ON.

•Select F0: DATA LIST: “BRAKE SWITCH”.

•Do not touch brake.

IF: Display is “NOT ACTIVE”:

YES

DIAGNOSTIC TROUBLE CODE (DTC) 56

BRAKE SWITCH SHORT TO PLUS

The problem is

intermittent.

GOTO INTERMITTENT

CONDITIONS.

•Check the short circuit

to voltage.

•Repair.

DIAGNOSTIC TROUBLE CODE (DTC) 61

GEAR ERROR

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

•The Transmission Control Module (TCM) is

calculating the slippage of the Converter and

transmission based upon the Engine Speed, the

Output Speed and the current gear ratio.

•The slippage of the converter at a high enough

engine speed is low. Then the transmission

should not slip more than a given value when

there is no shift.

Diagnostic Aids:

•This Diagnostic is not an electrical test done by

the TCM but a test between different information

(“logic test”).

•Detection conditions:

1Engine Speed > 3500 RPM

2Using the ratio of the current gear the

Converter Slippage is calculated based upon

the engine speed and the output speed. This

slippage must be more than:

528 RPM in 4th gear

536 RPM in 3rd gear

556 RPM in 2nd gear

595 RPM in 1st gear

3No malfunction: Engine Speed (DTC 13).

Output Speed (DTC 11). Downshift Protection

(DTC 62).

4The last change of shift solenoid was more

than 3 seconds ago.

5The conditions need to be present for at least

5.5 seconds.

•Action after the detection time: BACKUP MODE.

•Recovery conditions: To recover, do an IGNITION

CYCLE.

NOTE:

The TCC slip data is a calculated value, and not an

accurate one.

This value should be used to see if the TCC is

engaged or not.

DIAGNOSTIC TROUBLE CODE (DTC) 61

GEAR ERROR

IF the car has been in BACKUP MODE when the problem

occurred:

YES

IF there is another DTC which causes Backup Mode

(DTC20, DTC21, DTC22, DTC23, DTC25, DTC26, DTC31,

DTC32, DTC34, DTC35, DTC36, DTC37, DTC41, DTC42,

DTC44, DTC46, DTC54, DTC63, DTC82):

YES

Verify this other diagnosis first (because,

in backup mode the DTC61 is detected in

Manual 2 at high engine speed though

there is no problem). GOTO next DTCs.

IF there is other DTC:

YES

Do a test drive to reproduce the

problem using the DRIVER

INFORMATION.

NO GOTO next DTCs.

IF reproduced without Backup

Mode:

REPLACE TCM

DIAGNOSTIC TROUBLE CODE (DTC) 62

DOWNSHIFT PROTECTION

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

•The output speed information is used to

determine if the transmission has to upshift or

downshift.

•If this information suddenly changes due to an

open circuit or some electrical interference the

transmission would downshift.

•To avoid this the Transmission Control Module

(TCM) is constantly checking the variations of the

Output Speed. If this variation is too great (too

much decrease or increase) DTC62 is set. This

variation is taken into amount only when the

output speed is more than 2900 RPM (approx. 90

KPH).

•The transmission output speed sensor provides

information on vehicle speed to the TCM. The

speed sensor circuit consists of a magnetic

induction type sensor. The sensor is mounted

above a target wheel pressed on the output shaft

in the transmission extension. As the output shaft

turns, the target wheel teeth induce a variable

voltage in the magnetic pickup. This alternating

current (AC) signal is provided to the TCM. The

voltage increases with the speed of the wheel but

this is not used to define the speed of the vehicle.

As the vehicle moves faster, the signal alternates

faster between positive and negative voltages.

The Output speed information is proportional to

the frequency of the signal.

Diagnostic Aids:

• This is not an electrical test performed by the

TCM but a test between differing sensor signals

(a“logic" test).

•Detection conditions:

1Variation of Output Speed >512 RPM (approx.

16 KPH)/0.025s.

2Ignition ON more than 5 seconds.

3Mode Switch not in P, N or R.

4Last Output Speed > 2900 RPM.

5The conditions need to be present for at least

0.1 second.

•Action after the detection time: BACKUP MODE.

• Recovery conditions: CYCLE IGNITION

TRANSMISSION

CONTROL

MODULE (TCM)

TRANSMISSION

SPEED SENSOR

A12(12)

C-96

C-95

C1(1)

D1(17)

M-15

TRANSMISSION SPEED

SENSOR SHIELDS

—

OUTPUT

SPEED

INPUT

H-23

PNK

B11(23)

B12(24)

GROUND

BLK BLK

H-25

PNK

BLU

BLK

BLU

D07LW006

DIAGNOSTIC TROUBLE CODE (DTC) 62

DOWNSHIFT PROTECTION

If the DTC 53 is set:

CAUTION: If wire to connector C-96 terminal B12 is short to voltage,

Transmission Control Module (TCM) will be damaged.

YES

GOTHROUGH DTC53 first and do a test drive.

If you have a SCAN TOOL: TECH2?

YES

•Raise drive wheels.

•Connect the TECH2 GOTHROUGH TECH2

CONNECTION.

•Push F0: DATA LIST: DISPLAY. Read “AT

OUTPUT SPEED”.

IF: Output speed different from 0 RPM when the

wheels are turning:

YES NO

Problem is intermittent.

GOTO INTERMITTENT

CONDITIONS.

GOTO DTC 11: OUTPUT SPEED

FAILURE:

Diagnostic Aids.

•Ignition switch OFF.

•Disconnect TCM connector C-95 and C-96.

•Connect ohmmeter between connector C-96 terminals A12 and B12.

IF: Display is approx. 3K ohms:

•Disconnect transmission speed sensor

connector M-15.

•Connect ohmmeter between terminals 1 and

2 of the speed sensor.

IF: Display approx. 3K ohms:

•Connect ohmmeter between connector C-96 terminal

A12 and ground connector C-95 terminal C1.

IF: Display indicates an open circuit:

YES

•Wires from connector

C-96 to sensor

connector are open or

shorted together.

•Repair.

Replace

transmission

speed sensor.

YES

NOYES

•Check for faulty TCM

connection. If OK

REPLACE TCM

CONTINUED

ON NEXT PAGE

CONTINUED FROM

DIAGNOSTIC TROUBLE CODE (DTC) 62

DOWNSHIFT PROTECTION

(CONTINUED)

HINT:

•The wire between connector C-96 terminal B12 and

speed sensor connector M-15 terminal 2 can be

shorted to ground or open without creating a

problem because the TCM B12 pin is connected to

the TCM ground iternally and the signal is detected

only on the A12 input.

•Check wire for a short to ground between terminal

A12 and sensor connector M-15 terminal 1.

IF: Display indicates a short circuit:

YES

Repair.

•Connect voltmeter between connector C-96

terminal A12 and ground connector C-95

terminal C1.

•Ignition switch ON.

IF: Display indicates approximately 0 volt:

YES NO

•Check for faulty TCM

connectors. If OK GOTO

REPLACE TCM

•Check wire for a short

to voltage between

terminal A12 and speed

sensor connector M-15.

DIAGNOSTIC TROUBLE CODE (DTC) 63

EPROM CSUM FAILURE

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

•The Erasable Programmable Read Only Memory

(EPROM) is an electronic circuit that contains the

commands that control the Transmission Control

Module (TCM).

•The EPROM content is checked automatically

approx. each second by the TCM. This is called

Check Sum (CSUM) calculation. If this CSUM is

false this means that one command is altered.

•This can be due to a circuit failure or a bad

contact between the EPROM and the TCM and

the DTC63 will be set.

•If all EPROM connections are bad, the TCM does

not work. The CSUM can not be calculated and

detected. Nothing works, not even the CHECK

TRANS indicator.

Diagnostic Aids:

•This Diagnostic is not an electrical test done by

the TCM but an internal logic test.

•Detection conditions:

1Bad EPROM Check Sum.

2 The condition needs to be present for at least

approx. 1 second.

•Action after the detection time: BACKUP MODE.

• Recovery conditions: CYCLE IGNITION

To Solve the Problem

• REPLACE TCM.

DIAGNOSTIC TROUBLE CODE (DTC) 82

SHIFT OR BAND APPLY SOLENOIDS FAULTY DURING DRIVING

This DTC flashes the CHECK TRANS indicator and

sets the BACKUP MODE.

Circuit Description:

•The shift solenoids are simple ON/OFF solenoids

located in the main case valve body. The

solenoids are normally closed or open-type.

Depending on gear the Transmission Control

Module (TCM) controls the solenoids to open or

close a fluid inlet port. When the port is open,

fluid pressure actuates the shift valve.

•The solenoid is activated by a current. This

current is produced by applying a voltage to one

side (the High side) and a ground to the other

side (Low side).

•The High Side Driver (HSD) is a circuit of the TCM

that acts as a switch between the solenoids and

the supply voltage. The High side of the solenoid

is permanently supplied with voltage, except in

BACKUP MODE or when Ignition is OFF the High

Side Driver is turned OFF.

•The Low Side Driver (LSD) is a circuit of the TCM

that acts as a switch between the solenoid and

ground. When the solenoid is commanded ON

the TCM is switching the solenoid to ground.

The TCM continually monitors each solenoid

connection to its Low Side Driver and to its High

Side Driver for either low or high voltage.

•DTC82 is activated when the Shift High Side

Driver or one of the Shift Low Side Drivers

senses a short circuit or open circuit when the

engine is cranked, then when the car is driven.

DTC82 can be set only when the TCM is

activating the solenoids in with the problem

circuit.

•To know where the fault comes from, do

IGNITION CYCLE to use the TCM self-check of

solenoids when Engine is not cranked but

Ignition ON.

Diagnostic Aids:

•This diagnostic is an electrical test done by the

TCM.

•Detection conditions:

1HSD or LSD is improperly ON.

2The condition needs to be present for at least

0.15 second.

•Action after the detection time: BACKUP MODE

• Recovery conditions: CYCLE IGNITION

DIAGNOSTIC TROUBLE CODE (DTC) 82

SHIFT OR BAND APPLY SOLENOIDS FAULTY DURING DRIVING

This DTC is set when the car is driven (Engine ON) but

the diagnostic is not specific.

To correctly identify the problem, do an IGNITION

CYCLE.

If you have not already done an IGNITION CYCLE:

•Turn ignition switch OFF. Turn ignition switch ON

and wait 3 seconds to have the specific diagnostic

done.

•Then you can turn the engine ON or not.

Check on Scan Tool or Flashing Code what other DTC is

provided. It should be one of the following:

DTC31 or DTC32 or DTC34 or DTC36 or DTC41 or DTC42

or DTC44 or DTC46.

GOTO this DTC.

WITHOUT DTC SET

1. If you have already checked the Diagnostic

Trouble Code (DTC) and the scan tool TECH2

does not provide any DTC, and you have

reproduced the problem and no DTC was

stored:

This means that you have to check the problem

by comparing the way it should work to the

way it works now that the problem exits.

2. To find the problem, perform the following

tests:

•Transmission Operating Mode Test

TRANSMISSION OPERATING MODE TEST

Circuit Description:

The Transmission Control Module (TCM) can

controls 4L30-E operation in two modes: Power

mode, and Normal mode. The driver determines

the transmission operating mode through the

Power/Normal mode switch.

The Power mode provides better part-throttle ac-

celeration by providing earlier part-throttle upshifts.

METER

BLK

FUSE BOX

CB-5

15A

B-242 H-268

POWER

MODE

INDICATOR

B8(20)

POWER MODE

INDICATOR

CONTROL

POWER MODE

ENABLE INPUT

B9(21) C-96

C-96

2C-98

1C-98

TRANSMISSION

CONTROL

MODULE (TCM)

POWER

SWITCH

HOT IN ON OR START

RED/WHT

GRN/YEL

B-23

RED/WHT

D07LW023

TRANSMISSION OPERATING MODE TEST

IF: When you operated the Power Switch the indicator

turned ON:

YES NO

No Problem. •Install scan tool GOTHROUGH TECH2 CONNECTION.

•Ignition switch ON.

•Select F0: DATA LIST: POWER SWITCH.

Does TECH2 display “INACTIVE”?

YES NO

•Check wire for short to ground between

Transmission Control Module (TCM) connector C-96

terminal B8 and the Power Switch.

IF OK, replace the Power Switch.

•Press and hold down the Power Switch.

Does TECH2 display “ACTIVE”?

YES

•Check wire for open between TCM connector C-96

terminal B8 and the Power Switch.

IF OK, replace the Powe Switch.

The Power Switch is

working normally.

•Selector lever in Park.

Does Power mode indicator stay

on all the time?

YES NO

•Check wire for short to ground

between TCM connector and

indicator (SEE SCHEMATIC).

REPLACE TCM

•Select F5: ACTUATOR TEST:

CHECK POWER LAMP?”

•Press YES.

Does Power Mode Indicator light?

YES NO

The system is

functioning correctly. •Check fuse, bulb, and wire for open between

connector C-96 terminal B9 and indicator and

between indicator and fuse.

•Check wire for short to B+ between connector C-96

terminal B9 and indicator.

IF OK, REPLACE TCM

TCM: Transmission Control Module

TCM PRECAUTONS

The TCM can be damaged by:

(1) The Electrostatic discharge

(2) The short circuit of some terminals to voltage

or to ground.

Electrostatic Discharge Damage Description:

(1) Electronic components used to control systems

are often designed to carry very low voltage,

and are very susceptible to damage caused by

electrostatic discharge. It is possible for less

than 100 volts of static electricity to cause

damage to some electronic components. By

comparison, it takes as much as 4000 volts for

a person to even feel the zap of a static

discharge.

(2) There are several ways for a person to become

statically charged. The most common methods

of charging are by friction and induction. An

example of charging by friction is a person

sliding across a car seat, in which a charge of

as much as 25,000 volts can build up.

Charging by induction occurs when a person

with well insulated shoes stands near a highly

charged object and momentarily touches

ground. Charges for the same polarity are

drained off, leaving the person highly charged

with the opposite polarity. Static charges of

either type can cause damage, therefore, it is

important to use care when handling and

testing electronic components.

NOTICE: To prevent possible Electrostatic

Discharge damage:

(1) Do not touch the TCM connector pins or

soldered components on the TCM circuit

board.

(2)

When handling a TCM, do not open the

case and attempt to remove the MEM-CAL

from the circuit board.

(3) Be sure to follow the guidelines listed below if

servicing any of these electronic components:

(4) Do not open the replacement part package

until it is time to install the part.

(5) Avoid touching electrical terminals of the part.

(6) Before removing the part from its package,

ground the package to a known good ground

on the vehicle.

(7) Always touch a known good ground before

handling the part. This step should be repeated

before installing the part if the part has been

handled while sliding across the seat, while

sitting down from a standing position or while

walking some distance.

INFORMATION ON TCM:

(1) The Transmission Control Module (TCM) is

located in the passenger compartment and is

the control center of the electronic trans-

mission control system.

(2) The TCM must be maintained at a temperature

below 185 ¡F (85¡C) at all times. This is most

essential if the vehicle is put through a paint

baking process. The TCM will become in-

operative if its temperature exceeds 85 ¡C

(185¡F). Therefore, it is recommended that the

TCM be removed or that temporary insulation

be placed around the TCM during the time the

vehicle is in a paint oven or other high

temperature process.

(3) The TCM is designed to process the various

inputs and then respond by sending the

appropriate electrical signals to control trans-

mission upshift, downshift, shift feel and

torque converter clutch engagement.

(4) The TCM constantly interprets information

from the various sensors, and controls the

systems that affect transmission and vehicle

performance. By analyzing operational prob-

lems, the TCM is able to perform a diagnostic

function by displaying DTC(s) and aid the

technician in making repairs.

PROM/MEM-CAL:

(1) Information for a specific engine and vehicle is

programmed using an integrated circuit called

a Programmable Read-Only Memory (PROM).

It is also called a MEM-CAL (Memory Cali-

brator). This allows one model of controller to

be used for many different vehicles. The PROM

is located inside the TCM and has information

on the engine, transmission, calibration., etc.

While one TCM can be used by many vehicle

types, a PROM is more specific and therefore

must be used only with the correct vehicle.

For this reason, it is very important to check

the latest parts book and Service Bulletin

information for the correct part number when

replacing a TCM. The MEM-CAL is not serviced

seperately from the TCM.

INTERMITTENT CONDITIONS

If the TECH2 displays a diagnostic trouble code as

intermittent, or if after a test drive a DTC does not

reappear though the detection conditions for this

DTC are present: the problem is most likely a faulty

electrical connection or loose wiring. Terminals and

grounds should always be the prime suspect.

Intermittents rarely occur inside sophisticated

electronic components such as the TCM.

Use the DTC information to understand which wires

and sensors are involved.

When an intermittent problem is encountered,

check suspect circuits for:

(1) Poor terminal to wire connection.

(2) Terminals not fully seated in the connector

body (backed out).

(3) Improperly formed or damaged terminals.

(4) Loose, dirty, or corroded ground connections:

HINT: Any time you have an intermittent in

more than one circuit, check whether the circuits

share a common ground connection.

(5) Pinched or damaged wires.

(6) Electro-Magnetic Interference (EMI):

HINT: Check that all wires are properly routed

away from spark plug wires, distributor wires,

coil, and generator. Also check for improperly

installed electrical options, such as lights, 2-way

radios, etc.

Use the F3: SNAPSHOT mode of the TECH2 to help

isolate the cause of an intermittent fault. The

snapshot mode will record information before and

after the problem occurs. Set the snapshot to

“trigger” on the suspect DTC or, if you notice the

reported symptom during test drive, trigger the

snapshot manually.

(1) NOTE: When TECH2 is plugged the shifts are

always done at the maximum pressure. This

means that if you do SNAPSHOT while driving

you will notice firm shifts.

After the snapshot has been triggered, command

the TECH2 to play back the flow of data recorded

from each of the various sensors. Signs of an

intermittent fault in a sensor circuit are sudden

unexplainable jump in data values out of the

normal range.

CASE: problem still not solved GOTO TCM MEM-

CAL REPLACEMENT.

WIRING DIAGRAM

P-1

P-5

30B

OFF

IG2

ACC

STARTER SW

IG1

33B/R

3B/Y

3B/R

3R/G

3B/Y 0.85W

0.85R/G

CB-5

15A METER GAUGE

CB-11

15A BUCK TURN

P-11

8B/R

EB-16

100A MAIN 3W

3W/B

EB-17

40A

IGN B-2

EB-15

40A

IGN B-1

P-10 P-8 P-7

ENG BODY FRAME

FENDER-RH

COMMON

CHAMBER

C-36

E-74

EB-10

10A STOP LIGHT

EB-14

20A ECM

EB-12

10A TCM

0.5G

DATA LINK

CONNECTOR(16)

STOP LIGHT SW

STOP LAMP

0.5R 0.5R

3R/L

0.5L/R

EOM(A28)

C-96

X-18

RELAY; ECM MAIN

X-18

X-18 X-18

H-7 6

TCM

E-61E-61

ECM

E-61

0.5G

C-96

0.8GR

0.8L

0.8G

27263935

0.5R/W

C-96

B-23

POWER

B-24 H-20

0.5O/L

C-95

B-24

0.3O/L

H-26

B9 C10

0.3R/W

C-96

ECM (B-19)

0.5R/L

E-72

C-95

0.5B/R

ECM(B12)

D12

H-20

0.5B/R

TACHOMETER

H-616

0.5B/R

C-95

D14

ECM (B10) 0.5BR

C-95

0.5B

C-95

H-25

0.85B

DATA LINK CONNECTOR

C-102 11

FUSE STOP

C-102

0.5B1.25B

0.5B

C-102

E-61

C-95

0.5Y

0.8B/R

0.8BR/L

0.5Y

E-61

THROTTLE POSITION

SENSOR

E-68E-68

OUT

C-95

0.5GR

H-25

0.5L

H-25

3217128 30

E-68

C5 C6

C-95

0.5L

0.5G

10 8 721425

H-26

COMMON

CHAMBER

C-102

C-95

0.5Y/B

D16

E-60

CHECK

TRANS

B-44

C-44

C-95

C-41

C-41 H-7

C-41 8

C-41

H-25

D08RW541

BODY-RH C-2

M-25

0.75R/L0.85R/Y0.85R/Y0.85R/Y

1.25BR/L0.5BR/L

M-25 M-25 M-25 M-25 M-25

24 23 22 21 20

87631

C-95 C-95 C-95 C-95

0.5L/B 0.5L/B

1.25B0.85B

0.5L/W 0.5L/W

0.5L/R 0.5L/R

0.5L 0.5L

MODE SW

RELAY

STARTER

C-95

RELAY:A/C COMPRESSOR(4)

BACK LAMP

M-25 M-25

1.25B

0.85W 0.85W 0.75W

D8 D7 D6 D5 D4

C-98

C-96

0.5G/Y

0.5B

0.5B RELAY;TAIL(4)

POWER & WINTER SW

B8 B6

H-23

C-96

H-23

C-95

H-23

MAIN CASE

(T/MISSION)

2-3 SOLENOID 0.5BR/B

0.5BR/W

0.5Y/G

0.5Y/B

M-7

1-2, 3-4

SOLENOID

BAND APPLY

(+)

FORCE

MOTOR

(-)

TEMP

SENSOR

TCC SOLENOID

C-96C-96

H-23

0.5R/B

0.5Y/B

0.5Y/G

0.5BR/W

0.5BR/B

0.5R/B

M-6

C-95

H-23

0.85R/G

0.75R/G

M-6

C-95

H-38

M-6

C-96

H-38

M-6

C-95

H-23

0.5R/Y

0.5L

0.5GR

0.5R/Y

0.5L

0.5GR

M-6

C-95

ADAPTOR CASE

(T/MISSION)

43221354

M-7

M-7M-7

C7 C14 B3 C16 C15 A9 A2 C12 A3 C-96

0.5L

0.5BR/L

H-23

C-96

0.5P

H-23

C-96

H-23

MAGNETIC

SENSOR

B11 A12 B12

C-94

KICK DOWN SW

17 20 7 14 15 16 15 9 2 12 3 23 12 24

C-96

0.5L

0.5B

H-22

H-6

H-15

H-17

0.5L

0.5P

E-74 0.8BR/L

M-15

H-23

1H-23

2H-23

3H-23

4H-23

H-25

H-6

H-22

D08RW542

CONNECTOR LOCATION

RELAY & FUSE BOX

(X-18)

H-26

P-11

C-2

C-41

E-60 E-61 C-36

H-20

H-25

C-98

M-6

M-7 M-17

M-15

M-25

H-15

E-74

E-72

E-68

C-94

C-102

H-17

H-6

H-7 B-23

B-24

C-95

C-96

H-22

H-23

H-38

D08RW543

CONNECTOR LIST

No. Connector face No. Connector face

B-23

B-24

C-41

C-44

C-94

C-95

C-96

C-98

C-102

E-60

E-61

C-68

E-69

H-6

H-7

H-20

H-22

H-23

H-25

H-26

16151413121110987654321

98765432116151413121110

1234

5678

C1 C2 C3 C4 C5 C6 C7 C8 C9 C10C11 C12C13 C14C15C16

D1 D2 D3 D4 D5 D6 D7 D8 D9 D10D11D12D13D14D15D16

B1 A2

B2 A3

B3 A4

B4 A5

B5 A6

B6 A7

B7 A8

B8 A9

B9 A10

B10 A11

B11 A12

B12

3456

87654321

161514131211109

39373533 3129272523211917151311 9 7 5 3 1

403836343230 28262422 2018161412 10 8 6 4 2

1234 5678

2 4 6 8 10121416182022242628303234363840

13579111315171921232527293133353739

123

1 2

12345

1112131415

6 7 8 9 10

181920212216 17

3456

1234

5678

9101112

13 14 15 16

1234

5678

9101112

1234

5678

9101112

13 14 15 16

1234

5678

9101112

1234

5678910

151617181920

11121314

10 9876 54321

2221201918 151413121117 16

6543

4321

8765

12 11 10 9

16 15 14 13

4321

8765

12 11 10 9

16 15 14 13

12 34

56 78910

11 12 13 14

15 16 17 18 19 20

CONNECTOR LIST

No. Connector face No. Connector face

H-38

M-6

M-7

M-15

M-25

X-18

352

6758

345