SECTION 4B2 - DRIVELINE CONTROL SYSTEM (TOD)

Service Precaution

General Description

Abbreviations

System Components

Parts Location

TOD Switch and Indicator Lamp Function

Diagnosis

Basic Diagnostic Flow Chart

Parts Location

Circuit Diagram

Connector List

Checking Failed Pin

Checking Failed TOD Control Unit Pin

Diagnostic Trouble Codes

Diagnosis from Trouble Codes

Trouble Diagnosis Depending on The Status

of TOD Indicator

Diagnosis from Symptom

SERVICE PRECAUTION

WARNING: THIS VEHICLE HAS A SUPPLEMENTAL

RESTRAINT SYSTEM (SRS), REFER TO THE SRS

COMPONENT AND WIRING LOCATION VIEW IN

ORDER TO DETERMINE WHETHER YOU ARE

PERFORMING SERVICE ON OR NEAR THE SRS

COMPONENTS OR THE SRS WIRING. WHEN YOU

ARE PERFORMING SERVICE ON OR NEAR THE

SRS COMPONENTS OR THE SRS WIRING, REFER

TO THE SRS SERVICE INFORMATION. FAILURE TO

FOLLOW WARNINGS COULD RESULT IN

POSSIBLE AIR BAG DEPLOYMENT, PERSONAL

INJURY, OR OTHERWISE UNNEEDED SRS SYSTEM

REPAIRS.

CAUTION: Always use the correct fastener in the

proper location. When you replace a fastener, use

ONLY the exact part number for that application.

HOLDE N will call out those f asten ers th at requir e a

replacement after removal. HOLDEN will also call

out the fasteners that require thread lockers or

thread sealant. UNLESS OTHERWISE SPECIFIED,

do not use supplemental coatings (Paints , greases,

or other corrosion inhibitors ) on threaded fast eners

or fastener joint interfaces. Generally, such

coatings adversely affect the fastener torque and

the joint clamping force, and may damage the

fastener. When you install fasteners, use the

correct tightening sequence and specifications.

Following these instructions can help you avoid

damage to parts and systems.

GENERAL DESCRIPTION

412R200008

TOD (Torque on Demand) system is traction state

control system to vehicle.

Transfer Po sition and Driv e Mode

Three drive modes can be selected through operation of

TOD switch.

The electronic control unit (ECU) judges the signals

from the TOD switch and controls the transfer drive

mode and shift-on-the-fly system status.

TOD Control

The TOD position usually drives the rear wheels, and

transmits the torque to the front wheels with the help of

electronically controlled torque split mechanism

according to running conditions encountered. The

driving force is directly transmitted to the rear wheels.

This force is split by the transfer and delivered to the

front wheels. The magnitude of the torque transmitted to

the front wheels is controlled by changing the pressing

force of the multi plate disk clutch built in the transfer

unit. The pressing force of the clutch is controlled by

changing the duty ratio to the electromagnetic coil

mounted to the rear of the clutch. When the clutch is

completely disengaged, the rear wheels are driven.

When the clutch is completely engaged, a rigid four

whee l drive mode is obtained. The tor que split status is

controlled continuously between the rear wheel and four

whee l driv e mode s. T his system inc ludes fr ont an d re ar

speed sensors, and receives throttle position sensor

and engine speed information from the PCM, ABS

control unit signal, brake switch signal, and shift motor

position information .

The control unit receives signals sent from these

sensors and changes the pressing force of the

Transfer Position TOD SWITCH Mode Drive mode

HIGH 2H RWD Rear wheel drive

TOD 4WD (HIGH) Electronically controlled torque split

four wheel drive

LOW 4L 4WD (LOW) Low-speed mechanical lock-up four

wheel drive

multi-plate disk clutch to determine the torque

distribution on the front and rear wheels. Therefore,

when the slip of the rear wheels is increased against the

current torque level in the normal rear wheel drive

mode, the control unit detects the slip condition,

determines the optimum torque based on the feedback

control logic, and increases the torque to the front

wheels.

The control unit uses the signal from the throttle position

sensor to predict the future vehicle condition and the

intention of the driver with respect to acceleration and

deceleration, and determines the initial torque

distribution using these data and the information from

the speed sensors.

In case of small circle turning in the parking lot, for

example, the control unit minimizes the clutch pressing

force to restrict a braking phenomenon. When the ABS

becomes active, the control unit optimizes the clutch

pressing force to ensure stable braking.

TOD Indicator Control

The TOD indicator on the instrument panel informs the

driver of the current working status of the transfer unit.

The information is the drive mode (2H, TOD, 4L,

transition). The indicator can display occasional errors

and corresponding error codes.

ABBREVIATIONS

ABS Anti-lock Brake System

ADC Axle Disconnect

(Shift On the Fly system)

VB Battery Voltage

VIGN Ignition Voltage

SYSTEM COMPONENTS

PARTS LOCATION

A04R200004

EndOFCallout

Legend

(1) Mechani c al Loc k Sl eeve

(2) Drive Chain

(3) Clutch Pa ck

(4) Electromagnetic Clutch Solenoid

(5) Out put Shaft

(6) Rear Output Coupling

(7) Rear Speed Sensor

(8) Drive Sprocket

(9) Spring

(10) Return Spring

(11) Lockup Shift Fork

(12) Front Speed Sensor

(13) High-Low Shift Motor

(14) Driven Sprocket

(15) Shift Shaft

(16) Front Output Coupli ng

(17) Front Output Shaft

(18) Shift Cam

(19) Torsional Spring

(20) High-Low Shift Fork

(21) Shift Rod

(22) Input Shaft

(23) Reduction Hub

(24) High-Low Planetary Gear

(25) High Position

(26) Low Position

(27) Oil Pump

(28) Free Position

(29) Lock Position

Front and Rear Speed Sensors

The sensors are built in the transfer case, and detect

the rotation of rotors directly coupled to the propeller

shafts. Thirty rectangular pulses are output per one

rotation of the propeller shaft.

261RW045

Electromagnetic Coil

Receives the duty signals from the TOD control unit and

controls the pressing force of the clutch pressure cam.

261RW044

Multi Plate Disk Clutch Pack

Transm its the torque determined b y the clutch pr essing

forc e t o th e fr on t pr op e ll er sh af t via th e f r on t d r i ve ch ai n.

262RW029

Mechanical Lock Sleeve

Couples the front and rear propeller shaft mechanically

when the transfer shaft is in the 4L position.

262RW028

High-Low Planetary Gear Set

Establishes an auxiliary transmission mechanism.

When the TOD switc h is set to the 2H or TOD position ,

the reduc tion gear ratio i s 1.000 and the c orrespondin g

driving force is generated. Whe n the TOD switch is set

to the 4 L position, the reduction gea r ratio is 2 .480 and

the corresponding driving force is generated.

262RW030

4H and 4L Switch

Detects the shift position of the transfer from the

movement of the shift rod and outputs signals to the

TOD control unit.

261RW002

Transfer Connector (12-pin type)

Transmits the input and output signals of the speed

sensors, electromagnetic coil, and 4H and 4L switche to

the vehicle harness. A waterproof 12-pin type is used.

261RW046

Transfer Connector (8-pin type)

Transmits the output signals of the shift motor position

to the vehicle harness and power for the shift motor to

the transfer. A waterproof 8-pin type is used.

261RY00039

TOD Indicator Lamps

(on the instrument panel)

Functions:

• Bulb check

•Drive mode

• ABS IN status

• BRAKE O N statu s

821RY00082

Check Lamp

Functions:

• Bulb check

•System Failure

• Trouble code read out

821RY00082

TO D ECU

This control unit is mounted to the left of the brake pedal

bracket.

826R100027

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Legend

(1) Brake Pedal Bracket

High-Low Shift Motor

F07R200002

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When the TOD switch is changed to the 4L (or TOD)

position from the TOD (or 4L) po sition, the TOD control

unit drives the high-low shift motor according to the

signal. The transfer is shifted to low range from high

range (or to high range from low range) by the shift

motor.

The high-low shift motor can run, only when the

operation meets the following conditions to prevent an

unexpected shift between high and low range by a

operation error.

1. Ve hicle speed i s less than 2km/h and engi ne speed

is below 1500rpm

2. The AT selector position is neutral.

3. The brake is applied. (brake switch is on.)

The shift motor has a built-in encoder which monitors

shift s haft posi tion. T he con trol u nit co ntrols th e rotation

of the shift motor based on the detected shaft position

and the TOD switch signal to the TOD ECU.

The encoder position plate turns together with the shift

shaft and switches on or off the signals from the 4 (four)

fixed contact points on the case. The ECU calculates

the position of the shift motor from the combination of

switch signals.

Legend

(1) Reduction Hub

(2) Mechani c al Lock Sl eev e (In cludi ng the bui lt- in

Spring)

(3) Lockup Shift Fork

(4) Return Spring

(5) To TOD Control Unit

(6) Fixed Contact Point

(7) Encoder

(8) Worm gear

(9) Rotate

(10) Shift Motor

(11) The shift cam (12) can be turned freely around

the shift shaft (14).

(12) Shift Cam

(13) Torsional Spring

(14) Shift Shaft

(15) Shift Rod

(16) High-Low Shift Fork

(17) High

(18) Low

(19) 2H and TOD Position

(20) Direct Four Wheel Drive (4L Position)

(21) Earth

(22) High

(23) Low

(24) High

(25) Low

Motor Position and Encoder Position Code

Encode Position Plate

F04R100005

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Shift High Range and Low Range

When the car is stops (less than 2km/h or 1.2 mph and

less than 1500 rpm), the AT selecto r position i s neutral,

the brake is applied, and t he TOD switch is c hanged to

4L from TOD (or to TOD from 4L), the high-low shift

motor starts by po wer ap pli ed from th e TOD co ntrol uni t

and turns the shift shaft through the worm gear.

The shift shaft turns the sh ift cam through the torsional

spring.

The end of the shift cam moves the lockup shift fork and

the spiral groove on the outside of the shift cam slides

the high-low shift fork.

High-Low Shift Motor Position High-Low shift Motor Encoder Signal State of

Motor

Position a Position b Position c Position d

High End A OFF OFF OFF ON High Position

Near High End B OFF ON OFF ON

High Position C ON ON OFF ON

Middle Zone (1) D ON ON ON ON

Middle Zone (2) E OFF ON ON ON

Neutral Position F OFF ON ON OFF

Middle Zone (3) G ON ON ON OFF

Low Position H ON OFF ON OFF Low Position

Low End I ON OFF ON ON

Legend

(1) OFF Aria

(2) ON Aria

(3) Low

(4) High

(5) Earth

TOD SWITCH AND INDICATOR LAMP FUNCTION

TOD Switch and Indication of Drive Mode

The TOD switch sends signals to the TOD control unit

which s elects drive m odes and co ntrols the shift on th e

fly system (axle disconnect : ADC).

ADC: Shift on the fly

SW: Switch

TOD

switch

state

Drive mode Transfer shift

condition Transfer

position

detection

Shift on the fly TOD indicator

state

4HSW 4LSW Axle

SW ADC circuit

2H Rear-wheel

drive (RWD) Permissible at vehicle

speeds bel ow 100km/h OFF OFF OFF Power ON

TOD Electronic

torque sp li t

4WD (TOD)

OFF OFF ON Power OFF

AT: Neutral

Brakes: Applied

Vehicle Speed: <2km/h

Engine Speed: <1500rpm

4L Low range

mechanical

direct 4WD

(4L)

OFF ON ON Power OFF

TOD

Switch

state

TOD control unit terminal No. TOD indicator

state

TOD indicator TOD switch

7(Front) 8(Rear) 19(Auto) 30(2H) 43(4L)

2H OFF ON OFF ON OFF

TOD ON ON ON OFF OFF

4L ON ON OFF OFF ON

Indicator Lamp Operation During Movement of Shift

Rod

When the TOD switch is turned, and the signals from

the AXLE switch do not comply with the signal

conditions of the 4H and 4L switch, the indicator lamp

state select e d on the TOD switch and light-off mode ar e

repeatedly output at an interval of 1.0 second.

NOTE: After the TOD switch is turned to the specified

position and the AXLE switch generates compliant

signals, the normal output status is returned.

C07R100010

Bulb Check

When the starter swi tch is tur ned on, the TOD indi cator

lamps go on as shown below.

NOTE: Once the starter switch is turned on, all the TOD

indicator lamps are lit for two seconds regardless of the

TOD switch position.

C07RW016

ABS INPUT and BRAKE ON signals quick test:

1. Bridge DLC terminals 5 & 8.

2. Tur n the ign ition ON.

3. Observe the TOD Indicator lamp for condition (1).

4. Apply the foot brake and check the TOD Indicator

lamp for condition (2)

C07R200002

‘CHECK TOD’ Lamp

‘CHECK TOD’ Lamp Bulb Check

When the ignition switch is turned on, the ECU

illuminates the CHECK TOD lamp for 3 seconds.

C07RW019

DIAGNOSIS

General Information Diagnosis

The TOD system faults are classified into two groups:

- Those that can be identified by the status of the TOD

indicator lamps. These faults are diagnosed using the

procedures listed in “Diagnosis from Trouble Codes"

and “Trouble Diagnosis Depending on The Status of

TOD Indicator".

- Those that can be recognized as an abnormal

condition by the driver. These are diagnosed using the

prcedures listed in ‘Diagnosis from Symptom”

Self-diagnosis

The control unit has a function of self-diagnosis

function. If a fault occurs in the during of system startup,

the control unit flashes the CHECK TOD lamp and

stores the Diagnostic Trouble Code.

C07RW021

NOTE: If an intermittent fault occurs, the control unit

stops flashing upon correction of the fault. The DTC is

stored in the ECU.

Diagnostic Trouble Code Display

1) Turn on the ignition ON

2) Bridge terminals 5 & 8 of the DLC.

3) The CHECK TOD lamp will display the DTC/s

350R100005

- A code “12" is displayed continuously if there a no stored DTC’s.Should any DTC’s be stored, a code ‘12’ is

displayedthree times followed by each DTC starting from the lowest number first.

C07RY00018

Legend

(1) Data Link Connector (DLC) (2) Bridging Wire

Clearing Diagnostic Trouble Codes

1) Bridge terminals 5 & 8 of the DLC.

2) Turn on the ignition ON and remove DLC bridge.

3) Verify the DTC’s have been cleared

350R100005

EndOFCallout

Diagnostic Precautions

Replacement of Control Unit

The control unit itself rarely fails. In most cases, the

harnesses have failed (i.e. short-circuit), resulting in a

secondary failure. In other cases the exact cause

unknown due to intermittent nature of the fault and the

fault is removed accidentally along with replacement of

control unit.

Therefore, before replacing the control unit, always

check the harness connectors and whether a short

circuit has resulted in excessive current flow damaging

the ECU.

Intermittent Faults

Intermittent faults are mostly attributal to the improper

wiring harness and connector failure.

When intermittent troubles are occur, check the

associated circuit according to the following procedure.

1. Check that the connectors are correctly mated and

that the connector terminals are completely

engaged.

2. Check for deformed or damaged the terminals.

Repair or replace the terminals and reconnect the

terminals securely.

3. Check for broken wires in the harness. Perform a

contin uity check while wriggling the harness, looing

for any indication of an open circuit. Take care not to

use excessive force which may damage the

harness.

Test Run of Failed TOD Vehicle

If the TOD indi cator lamps e xperience d faulty o peration

even once in the past, the failed portion can be

identified by use of the procedure “Diagnosis from

T rouble Codes" or “Trouble Diagnosis Depending on the

Status of TOD Indicator". If the troubles that are only

recognized as abnormal phenomena of the vehicle by

the driver are observed, conduct the test run in the

followi ng procedure to reproduce the faul ty phenomena

and diagno se the fault for each phenome non.

1. Start the engine, and check that the TOD indicator

lamps are tur ned on for about two se conds for initi al

check; the CHECK lamp goes off; and the TOD

indica tor lamps display the specifie d drive mode. (I f

the CHECK lamp starts blinking, read the trouble

codes and identify the failed portion.)

2. While keeping the vehicle standstill, operate the

TOD switch to change the modes: 2H mode→TOD

mode→4L mode→TOD mode→2H mode. Check

that the TOD indicator lamps correctly display the

status whenever the mode is changed. If the

transition status is displayed during the shift

operation, run the vehicle a little to complete

shifting.

3. Slowly start the vehicle in the TOD mode, and add

the power to accelerate to at least 40 km/h (25

mph)an d maintain the speed for about two minutes .

Apply the brake to completely stop the vehicle.

Repeat this test pattern at least three times.

4. Turn the stee ring to the r ight end (or left end) in the

TOD mode, a nd sl owly start th e v ehi cle a nd mak e a

Legend

(1) Data Link Connector (2) Jumper Wire

circle five times. Next, conduct the same test in the

2H mode.

5. Slowly start the vehicle in the TOD mode, and

accelerate to at least 40 km/h (25 mph). Keep the

established speed, carefully change the mode in the

sequence “TOD mode→2H mode →TOD mode"

while checking that the shift is complete in each

mode change. After the test, apply the brake to

completely stop the vehicle.

6. Slowly start the vehicle in the TOD mode, and

accelerate to at least 40 km/h (25 mph). Apply the

brake strongly so that the ABS works, and

completely stop the vehicle.

7. Slowly start the vehicle in the 4L mode, and

accelerate to at least 20 km/h (13 mph). Apply the

brake to completely stop the vehicle.

If the CHECK lamp starts blinking during the test run,

read the trouble codes and give appropriate

maintenance according to the diagnostic procedure. If

the TOD indicator lamps are lit abnormally during the

run, check the lighting condition and give appropriate

maintenance according to the diagnostic procedure.

Even if the phenomena are not observed, try to

reprodu ce the abno rmal state reporte d by the custom er

to the possible extent.

Post-Repair Check

As long as the starter is not turned off, the TOD indicator

lamps continue blinking even after the failed portion is

repaired. Therefore, upon completion of repair, be sure

to turn off the starter switch once and then turn on it to

conduct the test run sequence specified in steps 1

through 7 above and check that the TOD indicator

lamps no longer show any faulty status.

BASIC DIAGNOSTIC FLOW CHART

C07R100011

PARTS LOCATION

D04R100023

EndOFCallout

Legend

(1) C–36

(2) H–13, H–14

(3) C–34

(4) I–53

(5) I–9

(6) I–10

(7) H–16, H–17

(8) C–16

(9) H–5, H–39

(10) A–1

(11) H–38

(12) A–2

(13) C–62

(14) C–59

(15) C–60

CIRCUIT DIAGRAM

D04R100003

D04R100004

D04R100005

D04R100006

CONNECTOR LIST

No. Connector face

A-1

A-2

C-4

C-16

C-34

C-36

C-55

C-59

C-60

C-62

E-21

E-30

E-53

H-5

H-6

H-13

H-14

H-16

No. Connector face

H-17

H-38

H-39

I-9

I-10

I-18

I-53

No. Connector face

CHECKING FAILED PIN

Connector Pin Assignment

• TOD control unit pin assignment

D04RY00011

No. NAME CONTENTS

1 N.C Not used

2 ENG REV Engine Speed

3 N.C Not used

4 N.C Not used

5 N.C Not used

6 N.C Not used

7 IND.A Display Front

8 IND. C Display Rear

9 N.C Not used

10 N.C Not used

11 EMC Clutch Solenoid

12 REF Speed Reference

13 COM (–) Speed GND

14 VIG Ignition

15 TPS TPS (PWM)

16 TECH 2 TECH–2

17 N. C Not used

18 N. C Not used

19 IND. B Display Auto

20 CHK TOD Check TOD

21 N.C Not used

22 PWR GND Power Ground

23 ADC (+) Axle Disconnect Output

24 COM GND Shift Motor Position GND

25 MTR POS3 Shift Motot Position 3

26 MTR POS1 Shift Motor Position 1

27 POSC AT Position C

28 POSA AT Position A

29 DIAG Diagnosti c Inpu t

30 TOD SW A TOD Swi tch A (2H)

31 4H SW 4H Switch Inpu t

32 FT. SIG Front Speed Signal

33 ABS IN ABS In

34 VB Power Bat

35 MTR H-L Power Shift Motor H-L

36 4WD OUT 4WD Signal Output

37 BRAKE SW Brake Switch Input

38 MTR POS4 Shift Motor Position 4

39 MTR POS2 Shift Motor Position 2

40 LIGHTING SW Lighting Switch Input

41 POSB AT Position B

42 AXLE SW Axle Switch Input

43 TOD SWB TOD Switch B (4L)

44 4L SW 4L Switch Input

45 RR. SIG Rear Speed Signal

46 GND. 1 ECU Ground 1

47 GND. 2 ECU Ground 2

48 MTR L-H Power Shift Motor L-H

No. NAME CONTENTS

Reference

• Transfer conn ector pin assi gnment (c onnec tor on the

transfer case)

for inspe ction of tran sf er pins .

810RW310

No. NAME CONTENTS

1 Ref. (Rer. ) Rear speed sensor reference output

2 Ref. (Frt. ) Front speed sensor reference output

3 SW GND SW GND

4 4H SW (+) 4H SW plus terminal

5 RR. SIG Rear Speed Sensor Signal

6 FT. SIG Front Speed Sensor Signal

7 POWER GND Power GND

8 SOL (+) Electromagnetic solenoid

9 COM (–) (Rer. ) Rear speed sensor GND

10 COM (–) (Frt. ) Front speed sensor GND

11 NC Not used

12 4L SW (+) 4L SW Plus Terminal

8-6

No. NAME CONTENTS

1 MTR POS2 Shift Motor Position 2

2 MTR POS3 Shift Motor Position 3

3 MTR POS4 Shift Motor Position 4

4 MTR L-H Power Shift Motor L-H

5 POS RETURN Shift Motor Position GND

6 MTR POS1 Shift Motor Position 1

7 MTR H-L Power Shift Motor H-L

8 NC Not Used

CHECKING FAILED TOD CONTROL UNIT PIN

NOTE:

1. Unplug the ECU connector and the pins, unless

otherwise specified.

2. Before removing the ECU, turn off the ignition

switch.

3. If the standard values are not observed, check the

pins with other testers.

Check

Pin No. Circuit to

be tested Ignition

Switch

Position

Engine

State Unit

Scale/

Range

Measure

between

Pin No.

Standard Value Note

22 P-GND OFF STOP Ω22, 47 Continuity : OK

46 GND 1 OFF STOP Ω46, 47 Continuity : OK

47 GND 2 OFF STOP Ω47, GND Continuity : OK

31 4H SW OFF STOP Ω31, 47 No continuity (high,

4L) : OK

44 4L SW OFF STOP Ω44, 47 No continuity (high)

and continuity (4L) :

42 AXLE SW ON RUN Ω42, 47 Continuity(TOD, 4L) :

OK Remove ECU connector and

start the engine. Move the

vehicle forth and back to

connect ax le sure ly.

29 DIAG OFF STOP Ω29 (TOD), 8

(DLC

Connector)

Continuity : OK DLC connector terminal 8

7 IND.A ON STOP DCV 7 (+), 47 (–) 8.0 ∼14.5 V when the indicator lamp is

turned off.

20 CHECK

TOD ON STOP DCV 20 (+), 47 (–) 8.0 ∼14.5 V When the indicator lamp is

turned off.

33 ABS IN ON STOP DCV 33 (+), 47 (–) 6.0 ∼11.0 V

12 REF ON STOP DCV 12 (+), 47 (–) 5 ∼9 V Connect ECU

32 FR T.(+) O N STOP DCV 32 (+), 47 (–) 0.7 ∼6 V Connect ECU and move the

vehicle (off one tooth of s peed

sensor ring) making sure of

volt a ge cha nge.

45 RR.(+) ON ST OP DCV 45 (+), 47 (–) 0.7 ∼6 V Connect ECU and move the

vehicle (off one tooth of s peed

sensor ring) making sure of

volt a ge cha nge.

13 COM(-) ON STOP DCV 13 (+), 47 (–) 0V Connect ECU

14 VIG ON STO P DCV 14 (+), 47 (–) 8 ∼14.5 V

34 VB OFF STOP DCV 34 (+), 47 (–) 8.0 ∼14.5 V

37 BRAKE SW OFF STOP DCV 37 (+), 47 (–) 8 ∼14.5 V Press brake pedal

15 TPS ON STOP DCV 15 (+), 47 (–) PWM duty cycle

10%(MAX)–

90%(MIN)

Step on the accelerator pedal

and make sure that du ty cy cl e

changes.

36 4WD OUT OFF STOP Ω 36, 47 7 ∼12 kΩ Disconnect battery GND

terminal

11 EMC(+) OFF STOP Ω11, 22 1.0 ∼5.0 ΩDisconnect battery GND

terminal

30 TOD SW A ON STOP DCV 30 (+), 47 (–) SW: TOD, 4L: 0 V

SW:2H:8.0 ∼ 14.5 V

43 TOD SWB ON STOP DCV 43 (+), 47 (–) SW: 2H, TOD:0V

SW: 4L: 8.0 ∼ 14.5V

40 LIGHT ON STOP DCV 40 (+), 47 (–) SW OFF : 0 V

SW ON : 8.0 ∼ 14.5 V

19 IND B ON STOP DCV 19 (+), 47 (–) 8.0 ∼14.5 V When the indicator lamp is

turned off

8 IND C ON STOP DCV 8 (+), 47 (–) 8.0 ∼ 14.5 V When the indicator lamp is

turned off

27 AT POSC ON STOP DCV 27 (+), 47 (–) ON:D, 3, 2, 1

OFF:PRN ON:8.0 ∼ 14.5 V

OFF:0V

41 AT POSB ON STOP DCV 41 (+), 47 (–) ON:R, N, D, 3

OFF:P, 2, 1 ON:8.0 ∼ 14.5 V

OFF:0V

28 AT POSA ON STOP DCV 28 (+), 47 (–) ON:P, R, 3, 2

OFF:N, D, 1 ON:8.0 ∼ 14.5 V

OFF:0V

2 ENG REV ON RUN ms 2, 47 Waveform (PWM) 50 ms (1000 rpm)

Check

Pin No. Circuit to

be tested Ignition

Switch

Position

Engine

State Unit

Scale/

Range

Measure

between

Pin No.

Standard Value Note

Tech 2 Scan Tool

From 98 MY, HOLDEN dealer service departments are

recommended to use Tech 2. Please refer to Tech 2

scan tool user guide.

901RW257

EndOFCallout

Legend

(1) PCMCIA Card

(2) SAE 16/19 Adaptor

(3) DLC Cable

(4) Tech 2

Getting Started

• Before operating the HOLDEN PCMCIA card with the

Tech 2, the following steps must be performed:

1. The HOLDEN 98 System PCMCIA card (1) inserts

into the Tech 2 (4).

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

cable (4).

3. Connect the DLC cable to the Tech 2 (4)

4. Mark sure the vehicle ignition is off.

5. Connect the Tech 2 SAE 16/19 adapter to the

vehicle DLC connec tor.

350R100005

EndOFCallout

6. The vehicle ignition turns on.

7. Power up the Tech 2.

8. Verify the Tech 2 power up display.

060RW009

Legend

(1) Data Link Connector (2) Jumper Wire

Operating Procedure

The power up screen is displayed when you power up

the tester with the HOLDEN systems PCMCIA card.

Follow the operating procedure below.

060R100102

060R100114

DIAGNOSTIC TROUBLE CODES

TPS : Throttle Position Sensor

EMC : Electromagnetic coil

ADC : Shift on the fly (Axle Dis Connect)

Code Item Tech2 code (P code) Diagnosis Check flow No.

12 — Start code Normal —

13 P1735 Ref Shorted GND 6

14 P1731 Front speed sensor Input abnormality (open, sig or com) 2

15 P1736 Ref Shorted VB6

16 P1737 Front speed sensor Input abnormality 4

17 P1774 Inhibitor switch Input abnormality 8

21 P1716 TPS Shorted or disconnected wiring,

abnorma li ty in inp ut 7

23 — ECU CPU abnormality 1

24 P1733 Rear speed sensor Input abnormality (open, sig or com) 3

27 P 17 38 Rear sp eed se ns or Inp ut abno rm alit y 5

28 P1760 ADC (+) & AXLE SW Output abnormality 10

31 P1721 EMC (+) Shorted VB, disconnected coil/wiring or

shorted GND 9

32 P1761 ADC (+) Shorted VB or disconnected wiring 11

33 P1762 ADC (+) Shorted GND 12

36 — ECU CPU abnormality 1

37 P1712 ECU CPU abnormality 1

38 P1714 ECU CPU abnormality 1

41 P1741 Hight-Low shift motor Shorted GND or disconnected wiring 13

42 P1773 Hight-Low shift motor User operation error (not failure) 14

43 P1743 Hight-Low shift motor Motor moving more than 5s 15

55 P1755 Hight-Low shift motor Input abnormality of motor position signal 16

DIAGNOSIS FROM TROUBLE CODES

• Diagnose the fault that have been saved to the

control unit according to the system self-diagnostic

function.

Check flow Trouble code Phenomenon Standard

1 23, 36, 37, 38 The ECU has failed. —

P1712, P1714

Step Action Yes No

1 Turn on the starter switch.

Is the trouble reproduced? Replace the

ECU and

conduct the test

run.

Go to Step 3 Go to Step 2

2 1. Clear the trouble codes.

2. Conduct the test run.

Is the trouble reproduced during the test run? Replace the

ECU and

conduct the test

run.

Go to Step 3

The trouble is

not reproduced.

Refer to

“Trouble

intermittently

observed".

Go to Step 3

3 1. Check that all the parts are mounted.

2. Clear the trouble codes.

Is this step complete? Verify the repair. Return to Step 3

NOTE: The following procedure shows the case that

the front or rear sensor common grounding line is

broken.

D04R100007

Check flow Trouble code Phenomenon Standard

2 14 Front speed sensor signal open or

GND short, speed sensor com open. 0.2V > sen sor voltage

P1731

Step Action Yes No

1 1. Start the engine.

2. Select TOD mode.

Is there the memory except DTC 14(P1731)? Go to Step 4 Go to Step 2

2 1. Turn off the starter switch.

2. Disconnect the ECU connector (C–59) and (C–60).

Is ther e the contin uity between the c onnector (C–6 0) term inal 10

and 25?

Repair the

circuit.

Go to Step 7 Go to Step 3

3 1. Disconnect the transfer connector (A–1).

Is ther e the contin uity between the c onnector (C–6 0) term inal 10

and the connector (A–1) terminal 6, the connector (C–59)

terminal 12 and connector (A–1) terminal 2, and the connector

(C–59) terminal 13 and connector (A–1) terminal 10?

Replace the

front speed

sensor.

Go to Step 7

Repair the

circuit.

Go to Step 7

4 Is the memory DTC 24(P1733)? Go to Step 5 Refer to other

trouble check flow.

5 Is there the continuity between harnesses of terminal 32 and 45

(vehicle side terminal of the front and rear speed sensor)? Go to Step 6

Repair the

circuit.

Go to Step 7

6 Is there the continuity between harnesses of terminal 12 and 13

(vehicle side terminal of the speed sensor COM(−) and ref)? Replace front

and rear speed

sensor.

Go to Step 7

Repair the

circuit.

Go to Step 7

7 1. Check that all the parts are mounted.

2. Clear the trouble code.

Is the step complete? Verify the repair. Return to Step 7

NOTE: The following procedure shows the case that

the front or rear sensor common grounding line is

broken.

D04R100007

Check flow Trouble code Phenomenon Standard

3 24 Rear speed sensor signal open or

GND short, speed sensor COM

open.

0.2 V > sensor voltage

P1733

Step Action Yes No

1 1. Start the engine.

2. Select TOD mode.

Is there the memory except DTC 24(P1733)? Go to Step 4 Go to Step 2

2 1. Turn off the starter switch.

2. Disconnect the ECU connector (C–59) and (C–60).

Is ther e the contin uity between the c onnector (C–6 0) term inal 23

and 25?

Repair the

circuit.

Go to Step 7 Go to Step 3

3 1. Disconnect the transfer connector (A–1).

Is ther e the contin uity between the c onnector (C–6 0) term inal 23

and the connector (A–1) terminal 5, the connector (C–59)

terminal 12 and connector (A–1) terminal 1, and the connector

(C–59) terminal 13 and connector (A–1) terminal 9?

Replace the

rear sp eed

sensor.

Go to Step 7

Repair the

circuit.

Go to Step 7

4 Is the memory DTC 14(P1731)? Go to Step 5 Refer to other

trouble cheek flow.

5 Is there the continuity between harnesses of terminal 32 and 45

(vehicle side terminal of the front and rear speed sensor)? Go to Step 6

Repair the

circuit

Go to Step 7

6 Is there the continuity between harnesses of terminal 12 and 13

(vehicle side terminal of the speed sensor COM(−) and ref)? Replace front

and rear speed

sensor.

Go to Step 7

Repair the

circuit.

Go to Step 7

7 1. Check that all the parts are mounted.

2. Clear the trouble code.

Is the step complete? Verify the repair Return to Step 7

NOTE: Find the trouble in which the pulse

corresponding to the running speed is not input.

D04R100007

Check flow Trouble code Phenomenon Standard

4 16 The front speed sensor no pulse. Hi level : 4.5 ∼ 6.0 V

Lo level : 0.7 ∼ 2.0 V

Frequency (F) =

700 – 850 Hz (at 50 km/h or 31

mph)

P1737

Step Action Yes No

1 1. Connect TECH 2.

While run ning in TOD mod e, does TECH–2 's front spe ed sensor

indication change with vehicle speed?

Go to Step 2

Repair and

inspection front

speed sensor

tone wheel.

Go to Step 6

2 1. Clear the trouble code.

While running at 40 km/h or 25 mph in TOD mode for 30

consecutive sec, is the trouble code reissued?

Go to Step 3

The trouble is

not reproduced.

Refer to

“Troubles

intermittently

observed".

3 1. Turn off the starter switch.

2. Disconnect the ECU connector (C–59) and (C–60).

Is ther e the contin uity between the c onnector (C–6 0) term inal 10

and 25?

Repair the

circuit.

Go to Step 6 Go to Step 4

4 1. Disconnect the transfer connector (A–1).

Is ther e the contin uity between the c onnector (C–6 0) term inal 10

and the connector (A–1) terminal 6, the connector (C–59)

terminal 12 and connector (A–1) terminal 2, and the connector

(C–59) terminal 13 and connector (A–1) terminal 10?

Replace the

front speed

sensor.

Go to Step 5

Repair the

circuit.

Go to Step 5

5 1. Clear the trouble code.

While running at 40 km/h or 25 mph in TOD mode for 30

consecutive sec, is the trouble code reissued?

1.Replace

ECU.

2.Go to Step 6 Go to Step 6

6 1. Check that all the parts are mounted.

2. Clear the trouble code.

Is this step complete? Repeat the

“Diagnosis Flow". Return to Step 6

NOTE: Find the trouble in which the pulse

corresponding to the running speed is not input.

D04R100007

Check flow Trouble code Phenomenon Standard

5 27 The rear speed sensor no pulse. Hi level : 4.5 ∼ 6.0 V

Lo level : 0.7 ∼ 2.0 V

Frequency (F) =

700 – 850 Hz (at 50 km/h or 31

mph)

P1738

Step Action Yes No

1 1. Connect TECH 2.

While running in TOD mode, d oes TECH–2's rear speed sensor

indication change with vehicle speed?

Go to Step 2

Repair and

inspection front

speed sensor

tone wheel.

Go to Step 6

2 1. Clear the trouble code.

While running at 40 km/h or 25 mph in TOD mode for 30

consecutive sec, is the trouble code reissued?

Go to Step 3

The trouble is

not reproduced.

Refer to

“Troubles

intermittently

observed".

3 1. Turn off the starter switch.

2. Disconnect the ECU connector (C–59) and (C–60).

Is ther e the contin uity between the c onnector (C–6 0) term inal 23

and 25?

Repair the

circuit.

Go to Step 5 Go to Step 4

4 1. Disconnect the transfer connector (A–1).

Is ther e the contin uity between the c onnector (C–6 0) term inal 23

and the connector (A–1) terminal 5, the connector (C–59)

terminal 12 and connector (A–1) terminal 1, and the connector

(C–59) terminal 13 and connector (A–1) terminal 9?

Replace the

rear sp eed

sensor.

Go to Step 5

Repair the

circuit.

Go to Step 5

5 1. Clear the trouble code.

While running at 40 km/h or 25 mph in TOD mode for 30

consecutive sec, is the trouble code reissued? Replace EUC.

Go to Step 6 Go to Step 6

6 1. Check that all the parts are mounted.

2. Clear the trouble code.

Is this step complete? Repeat the

“Diagnosis Flow". Return to Step 6

NOTE: If the reference wire (12) is short-circuited to

GND, the speed signal is not generated. If the wire is

short-circuited to the battery voltage, the signal level

becomes faulty.

D04R100007

Check flow Trouble code Phenomenon Standard

6 13 The reference is short-circuited to

GND. Reference = 5 V

P1735

15 The reference is short-circuited to

VB.

P1736

Step Action Yes No

1 1. Start the engine.

Does the voltage between terminals 12 and 47 meet the standard

5V?

Refer to “Trouble

intermittently

observed". Go to Step 2

2 Is the voltage below the standard? Go to Step 3 Go to Step 7

3 1. Turn off the starter switch.

2. Disconnect the ECU connector.

Is the continuity established between vehicle harness terminals

(C–59)12 and (C–60)25? Go to Step 4

The ECU is

failed. Replace

the ECU.

Go to Step 8

4 1. Disconnect the H-38 connector.

Is the continuity established between floor harness connector

termina ls (H- 38)2 and (H- 3 8)15?

Go to Step 5

Short to GND

between (C–

59)12 and (H–

38)2.

Repair the

circuit.

Go to Step 8

5 1. Disconnect the A-1 connector.

Is the conti nuity establishe d between trans fer harness con nector

male terminals (A–1)1 and (A–1)7?

Replace the

rear sp eed

sensor.

Go to Step 8

The reference

harness for the

rear speed

sensor is short–

circuited to

GND. Repair

the circuit.

Go to Step 6

6 1. Disconnect the A-1 connector.

Is the conti nuity establishe d between trans fer harness con nector

terminals (A–1)2 and (A–1)7?

Replace the

front speed

sensor.

Go to Step 8

The reference

harness for the

rear speed

sensor is short–

circuited to

GND. Repair

the circuit.

Go to Step 8

7 1. Turn off the starter switch.

2. Disconnect the ECU connector.

3. Turn on the starter switch.

Is the battery voltage observed between harness connector

terminals (C–59)12 and (C–60)25?

Repair the

circuit.

Go to Step 8

The ECU has

failed. Replace

the ECU.

Go to Step 8

8 1. Check that all the parts are mounted.

2. Clear the trouble code.

Is this step complete? Repeat the

“Diagnosis Flow" Go to Step 8

NOTE: The signal voltage from the TPS deviates from

the standard range .

D04R100008

Check flow Trouble code Phenomenon Standard

6 7 The voltage of the throttle position

sensor (TPS) is faulty. See below table.

P1716

D04RY00012

Step Action Yes No

1 1. Turn off the starter switch.

Is the battery voltage normal?

Go to Step 2

Charge or

replace the

battery.

Go to Step 7

2 1. Turn on the starter switch.

Does the voltage between terminals 15 and 47 fall within the

standard range? Go to Step 3 Go to Step 4

3 1. Clear the trouble code.

2. Turn on the starter switch.

Is there DTC21 (P1716)? Go to Step 4

Refer to “Trouble

intermittently

observed".

4 1. Turn off the starter switch.

2. Disconnect the ECU connector.

3. Turn on the starter switch.

Does the voltage between terminals (C–59)15 and (C–60)25 fall

within the standard range?

The ECU has

failed. Replace

the ECU.

Go to Step 7 Go to Step 5

5 Is the harness healthy?

Go to Step 6

Repair the

harness.

Go to Step 7

6 Is the TPS healthy?

Go to Step 7

Replace the

TPS.

Go to Step 7

7 1. Check that all the parts are mounted.

2. Clear the trouble code.

Is this step complete? Repeat the

“Diagnosis Flow". Go to Step 7

D04R100008

Check flow Trouble code Phenomenon Standard

8 17 The input from the mode switch is

abnormal. —

P1774

Step Action Yes No

1 Is the TOD control unit the regular part? (Verity the part number.)

Go to Step 2

Replace with

the regular part.

Go to Step 2

2 1. Turn on the starter switch.

Does the voltage between the terminal 28 and 47 accord with the

table 1 corresponding to the AT selector positions? Go to Step 3 Go to Step 5

3 Does the voltage between the terminal 41 and 47 accord with the

table 1 corresponding to the AT selector positions? Go to Step 4 Go to Step 6

4 Does the voltage between the terminal 27 and 47 accord with the

table 1 corresponding to the AT selector positions? Refer to “Trouble

intermittently

observed". Go to Step 7

5 1. Disconnect the AT mode connector (E–53).

Does the continuity between the inhibitor switch terminal 5 (D)

and 8 (A) accord with the table 2 corresponding to the AT

selector positions?

Repair the

circuit between

the connector

terminal (C–60)

6 and (E–53) 8.

Go to st e p 8

Replace the

inhibitor switch.

Go to Step 8

6 1. Disconnect the AT mode connector (E–53).

Does the continuity between the inhibitor switch terminal 5 (D)

and 7 (B) accord with the table 2 corresponding to the AT

selector positions?

Repair the

circuit between

the connector

terminal (C–60)

19 and (E–53)

Go to Step 8

Replace the

inhibitor switch.

Go to Step 8

7 1. Disconnect the AT mode connector (E–53).

Does the continuity between the inhibitor switch terminal 5 (D)

and 6 (C) accord with the table 2 corresponding to the AT

selector positions?

Repair the

circuit between

the connector

terminal (C–60)

5 and (E–53) 6.

Go to St e p 8

Replace the

inhibitor switch.

Go to Step 8

8 1. Check that all the parts are mounted.

2. Clear the trouble code.

Is this step complete? Verify the repair. Go to S tep 8

Table 1

Table 2

Unit: V

AT selector position Voltage between

terminal 28 and 47 Voltage between

terminal 41 and 47 Voltage between

terminal 27 and 47

P120 0

R1212 0

N0120

D01212

3121212

212012

10012

Continuity between term inals of inhibitor switch connector (E–41)

AT selector position Continuity between

terminal 8(A) and 5(D) Cont in u i t y be tw een

terminal 7(B) and 5(D) Continuity between

terminal 6(C) and 5(D)

P YES NO NO

R YES YES NO

NNOYESNO

DNOYESYES

3 YES YES YES

2 YES NO YES

1NONOYES

D04R100007

Check flow Trouble code Phenomenon Standard

9 31 The electromagnetic coil is broken or

shorted to the battery or GND. —

P1721

Step Action Yes No

1 1. Clear the trouble code.

2. Start the engine

3. Set the TOD mode.

Is there DTC31 (P1721)? Go to Step 2

Refer to “Trouble

intermittently

observed".

2 1. Turn off the starter switch.

2. Disconnect the ECU connector from ECU.

Is the continuity established between terminals (C–59)11 and (C–

59)22? Go to Step 3 Go to Step 5

3 1. Connect the ECU connector.

2. Start the engine.

3. Set the TOD mode.

Does the voltage between terminals 11 and 22 indicate at least

0.4V? Go to Step 4 Go to Step 6

4 Is the battery voltage always observed between terminals 11 and

22? The harness is

short–circuited

on the battery.

Repair the

circuit.

Go to Step 8 Go to Step 6

5 1. Disconnect the A–1 connector.

Is the continuity established between transfer connector

terminals (A–1)8 and (A–1)7? The harness is

broken. Repair

the circuit.

Go to Step 8

Replace the

transfer

electromagnetic

coil (solenoid

clutch).

Go to Step 8

6 1. Turn off the starter switch.

2. Disconnect the ECU connector from ECU.

Is the resistance between the connector (C–59) terminal 11 and

22 1.0 ∼ 5.0Ω?

The ECU has

failed. Replace

the ECU

Go to Step 8 Go to Step 7

7 Is the resistance between the transfer connector (A–1) terminal 8

and 7 1.0 ∼ 5.0Ω?The harness is

disconnection

or short to

GND. Repair

the circuit.

Go to Step 8

Replace the

transfer

electromagnetic

coil (solenoid

clutch).

Go to Step 8

8 1. Check that all the parts are mounted.

2. Clear the trouble code.

Is this step complete? Repeat the

“Diagnosis Flow". Return to Step 8

NOTE: The shift on the fly system is not changed

between 2WD and 4WD modes normally.

CAUTION: If code 32 or 33 is also observed,

remove the trouble associated with code 32 or 33

first.

D04R100013

Check flow Trouble code Phenomenon Standard

10 28 The shift on the fly system (front axle

disconnect) works incorrectly. —

P1760

Step Action Yes No

1 1. Turn on the starter switch.

2. Set the transfer to the 2H mode.

Is the battery voltage observed between terminals 23 and 47? Go to Step 2 Go to Step 5

2 Is 5V observed between terminals 42 and 47? Go to Step 3 Go to Step 6

3 1. Set the transfer to the TOD mode.

Does the voltage between terminals 23 and 47 indicate 0∼1V?

Go to Step 4

The ECU has

failed. Replace

the ECU.

Go to Step 7

4 Does the voltage between terminals 42 and 47 indicate 0V? The phe nom enon

is not reproduced.

Refer to “Troubles

intermittently

observed".

The shift on the

fly sy st em is

failed (refer to

Section 4B1

and 4C).

Go to Step 7

5 Does the TOD indicator show the 2H mode? The ECU has

failed. Replace

the ECU.

Go to Step 7

See “Trouble

Diagnosis

Depending on The

Status of TOD

Indicator".

6 Set the transfer to the TOD mode.

Does the voltage between terminals 23 and 47 indicate 0∼1V? The shift on the

fly system has

failed (refer to

Section 4B1

and 4C).

Go to Step 7

The ECU has

failed. Replace

the ECU.

Go to Step 7

7 1. Check that all the parts are mounted.

2. Clear the trouble code.

Is this step complete? Verify the repair. Return to Step 7

NOTE: The on/off signal line of the shift on the fly

system is broken, or the line is short–circuited to the

battery.

D04R100013

Check flow Trouble code Phenomenon Standard

11 32 The on/off signal (ADC) line of the

shift on the fly system (front axle

disconnect) is broken, or the line is

short-circuited to the battery.

—

P1761

Step Action Yes No

1 1. Turn off the starter switch.

2. Disconnect the ECU connector from ECU.

3. Disconnect ADC control unit connector (C–62).

Is the contin ui ty es tablishe d b etwe en termi nal s (C –60 ) 1 and (C–

62) 4? After checking, connect the ADC control unit connector. Go to Step 2

The harness is

broken. Repair

the circuit.

Go to Step 6

2 1. Disconnect the battery ground cable.

Is there the continuity between the connector terminal (C–60) 1

and (C–59) 14?

The harness is

short-circuited

to VIGN. Repair

the circuit.

Go to Step 6 Go to Step 3

3 1. Disconnect the battery ground cable.

Is there the continuity between the connector terminal (C–60) 1

and (C–60) 12?

The harness is

short-circuited

to VB. Repair

the circuit.

Go to Step 6 Go to Step 4

4 Is the resistance between the connector terminal (C–60) 1 and

(C–60) 25 less than 1Ω?The harness is

short-circuited

to GND. Repair

the circuit.

Go to Step 6 Go to Step 5

5 1. Turn off the starter switch.

2. Connect ECU connector.

3. Turn on the starter switch.

4. Set the transfer to the 2H mode.

Is the battery voltage observed between the connector (C–60)

termina ls 1 and 25?

The

phenomenon is

not reprodu ce d.

Refer to

“Trouble

intermittently

observed" or

Refer to

“Sec.4B1 Shift

on the Fly".

The ECU has

failed. Replace

the ECU.

Go to Step 6

6 1. Check that all the parts are mounted.

2. Clear the trouble code.

Is this step complete? Verify the repair. Return to S tep 6

NOTE:

• The on/off sign al line of the shift on t he fly system is

short–circuited to GND.

• The system enters into the fail-safe mode because of

fusing or system protection.

(If a short–circuit is observed on GND, the output to

the on/off signal line becomes 0V.)

D04R100013

Check flow Trouble code Phenomenon Standard

12 33 The ADC line is short-circuited to

GND. —

P1762

Step Action Yes No

1 1. Turn off the starter switch.

2. Disconnect the ECU connector from ECU.

3. Disconnect the ADC control unit connector (C–62).

Is there the continuity between the connector terminal (C–60) 1

and (C–62) 4? After checking, connect the ADC control unit

connector . Go to Step 2

The harness is

broken. Repair

the circuit.

Go to Step 4

2 Is th e r es istan ce be twee n te rm in als (C–60) 1 an d ( C–6 0) 25 l es s

than 1Ω?The si gna l lin e

circuit of the

shift on the fly

system is

short-circuited

to GND. Repair

the circuit.

Go to Step 4 Go to Step 3

3 1. Connect the ECU connector.

2. Turn on the starter switch.

3. Set the transfer to the 2H mode.

Is the battery voltage observed between the connector (C–60)

terminal 1 and 25?

The

phenomenon is

not reproduced.

Refer to

“Trouble

intermittently

observe" or

Refer to

“Sec.4B1 Shift

on the Fly".

The ECU has

failed. Replace

the ECU.

Go to Step 4.

4 1. Check that all the parts are mounted.

2. Clear the trouble code.

Is this step complete? Verify the repair. Return to Step 4

D04R100009

Check flow Trouble code Phenomenon Standard

13 41 The High-Low motor circuit is

broken.

The circuit is short-circuited to GND.

—

P1741

43 The High-Low motor has moved

consecutive more than 5 sec. —

P1743

Step Action Yes No

1 1. Turn on the starter switch.

When the motor is not moving, is the voltage between the

terminals 35 and 47 8.0 ∼ 14.5V? Go to Step 2 Go to Step 3

2 When the motor is not moving, is the voltage between the

terminal 48 and 47 8.0 ∼ 14.5V? Go to Step 5 Go to Step 3

3 1. Turn off the starter switch.

2. Disconnect the ECU connector (C–60) and transfer

connector (A–2).

Is ther e the contin uity between the c onnector term inal (C–60) 13

and (A–2) 7? Go to Step 4

Repair the

circuit.

Go to Step 11

4 Is th ere t he co ntinui ty bet ween the conn ector te rmin al (C –60) 26

and (A–2) 4? Go to Step 5

Repair the

circuit

Go to Step 11

5 1. Connect the ECU connector (C–60) and transfer connector

(A–2).

2. Turn on the starter switch

Is the transfer shifted to the low range from the high range? Go to Step 6 Go to Step 7

6 1. Is the transfer shifted to the high range from the low range. The

phenomenon is

not reprodu ce d.

Refer to

“Trouble

intermittently

observed". Go to Step 8

7 1. After the starter switch is turned off, turn on the starter switch.

2. Right after the TOD switch is changed to the 4L position from

the TOD position, measure the voltage for 5 seconds.

Is the v oltage betwe en ter minal 48 a nd 4 7 0V whil e the mo tor is

moving and 8.0 ∼ 14.5V after the motor moving stops? Go to Step 9

Replace the

ECU.

Go to Step 11

8 1. After the starter switch is turned off, turn on the starter switch.

2. Right after the TOD switch is changed to the TOD position

from 4L position, measure the voltage for 5 seconds.

Is the voltage between terminals 35 and 47 0V while motor is

moving and 8.0 ∼14.5V after the motor moving stops? Go to Step 9

Replace the

ECU.

Go to Step 11

9 1. Remove the motor asm with the connector (A–2) from the

transfer.

2. Connect the ECU connector (C–60).

3. Turn on the starter switch.

When the TOD switch is changed to the 4L position from the

TOD position , does the sha ft in the motor asm rotate to the L ow

direction? Go to Step 10

Replace the

high-low motor

asm.

Go to Step 11

10 When the TOD switch is changed to the TOD position from the

4L position, does the shaft in the motor asm rotate to the High

direction? Repair the

transfer asm.

Go to Step 11

Replace the

high–low motor

asm.

Go to Step 11

11 1. Check that all the parts are mounted.

2. Clear the trouble code.

Is this step complete? Verify the repair Return to Step 11

NOTE:

• Confirm the operation conditions when changing high

and low range.

– The car stops. (less than 2 km/h or 1.2 mph and

engine speed less than 1500 rpm)

– The AT selector position is neutral.

– Th e br ake is applied (brake switch : ON)

• Verify the completion of changing the high/low range

by the TOD indicator on the instrument panel.

NOTE:

• Confirm the operation conditions when changing

high/low range.

– The car stops. (less than 2 km/h or 1.2 mph and

engine speed: less than 1500 rpm)

– The AT selector position is neutral.

– Th e br ake is applied (brake switch : ON)

• Verify the complet ion of chan ging the hi gh/low range

by the TOD indicator on the instrument panel.

• This code does not indicate the trouble of the transfer

or ECU, an d is memoried when an error operati on is

carried out under high-low motor running.

There fore this code i s not memoried if the transfe r is

operated according to “Owner's Manual".

Check flow Trouble code Phenomenon Standard

14 42 Error operation was carried out

under high-low motor running. —

P1773

Step Action Yes No

1 1. Clear the trouble code.

Is the transfer changed to the low range from the high range? Go to Step 2 Go to Step 3

2 Is the transfer changed to the high range from the low range? The

phenomenon is

not reprodu ce d.

Refer to

“Trouble

intermittently

observed". Go to Step 3

3 Is the trouble code memoried? Go to Step 4 See “Diagnosis

from Symptom".

4 Is the memory DTC42 (P1773)?

Go to Step 5

Remove the

trouble

associ ated with

codes except

DTC 42 first.

Confirm the

DTC again.

Go to Step 5

5 1. Clear the trouble code.

2. Confirm the condition and operation of the transfer range

changing and check the state of the TOD indicator. Change

the transfer to the low from the high and vice versa.

Is the transfer changed to the low from the high and to the high

from the low?

The transfer is

changed in both

ranges by the

correct operation.

Operate the

transfe r accor d ing

to “Owner's

Manual". Go to Step 6

6 Is the trouble code memoried? Go to Step 7 See “Diagnosis

from Symptom".

7 Is the memory DTC 42 (P1773)?

Replace the

ECU.

Go to Step 8

Remove the

trouble

associ ated with

codes except

DTC 42 first.

Confirm the

DTC again.

Go to Step 5

8 1. Check that all the parts are mounted.

2. Clear the trouble code.

Is this step complete? Verify the repair. Go to Step 8

D04R100009

Check flow Trouble code Phenomenon Standard

15 55 High-Low motor position signal is

abnormal.

Circuit is shorted to GND.

—

P1755

Step Action Yes No

1 1. Turn on the starter switch.

Is the transfer changed to the low range from the high range? Go to Step 2 Go to Step 4

2 Is the transfer changed to the high range from the low range? Go to Step 3 Go to Step 5

3 1. Clear the trouble code.

2. Turn on the starter switch.

Is the memory DTC 55 (P1755)?

Go to Step 1

The

phenomenon is

not reproduced.

Refer to

“Trouble

intermittently

observed".

NOTE:

• Confirm the operation conditions when changing high

and low range.

– The car stops. (less than 2 km/h or 1.2 mph and

engine speed: less than 1500 rpm)

– The AT selector position is neutral.

– Th e br ake is applied (brake switch : ON)

• Verify the completion of changing the high/low range

by the TOD indicator on the instrument panel.

• When changing high/low range, start the engine to

prevent the battery dead.

Table (1) (high position standard)

Table (2) (low position standard)

Table (3) (high position standard)

Table (4) (low position standard)

4 1. Turn off the starter switch.

2. Disconnect the ECU connector (C–60).

Is the continuity between the terminals ranged within the any

case (case1, 2 or 3) in the following table (1)? Go to Step 8 Go to Step 6

5 1. Turn off the starter switch.

2. Disconnect the ECU connector (C–60).

Does the continuity between the terminals comply with the

following table (2)? Go to Step 8 Go to Step 7

6 1. Turn off the starter switch.

2. Disconnect the transfer connector (A–2).

Is the continuity between the male terminals ranged within the

any case (case1, 2 or 3) in the following table (3)?

Go to Step 8

The encoder

has failed .

Replace the

high-low motor

asm.

Go to Step 9

7 1. Turn off the starter switch.

2. Disconnect the transfer connector (A-2).

Does the continuity between male terminals comply with the

following table (4)?

Go to Step 8

The encoder

has failed .

Replace the

high-low motor

asm.

Go to Step 9

8 1. Turn off the starter switch.

2. Disconnect the ECU connector (C–60) and transfer

connector (A–2).

Is there the continuity between co nnector terminal (C–60) 4 and

(A–2) 6, (C–60) 17 and (A–2) 1, (C–60) 3 and (A–2) 2, (C–60) 16

and (A–2) 3, and (C–60) 2 and (A–2) 5?

The encoder

has failed.

Replace the

high-low moto r

asm.

Go to Step 9

The circui t in

which there is

no continuity is

broken. Repair

the circuit.

Go to Step 9

9 1. Check that all the parts are mounted.

2. Clear the trouble code.

Is this step complete? Verify the repair. Go to Step 9

Step Action Yes No

Cas

eContinuity between terminals:

26 and 24 39 and 24 25 and 24 38 and 24

1NO NO NO YES

2 NO YES NO YES

3 YES YES NO YES

Continuity between terminals:

26 and 24 39 and 24 25 and 24 38 and 24

YES NO YES YES or NO

Cas

eContinuity between the connector (A–2)

terminals:

6 and 5 1 and 5 2 and 5 3 and 5

1NONONOYES

2 NO YES NO YES

3 YES YES NO YES

Continuity bet ween the conne ctor (A– 2) te rminals:

6 and 5 1 and 5 2 and 5 3 and 5

YES NO YES YES or NO

TROUBLE DIAGNOSIS DEPENDING ON THE STATUS OF TOD INDICATOR

Functional check with TOD indicator light is conducted

prior to check on Charts A–H.

• After the starter is switched on, check and see if the

status has become as tabulated below .

C04R200003

• If the status is as tabulated above, there is no

problem. If not as tabulated above, inspect the

harness.

D04R100013

Chart A Indicator drive circuit

Function of circuit The circuit informs the indicator of the working condition of the ECU.

Fail condition All the TOD indicator lamps and CHECK lamp are lit.

Indicator lamp state

TOD switch position 2H/TOD/4L

Step Action Yes No

1 Turn on the starter switch.

Is the battery voltage observed between terminals 14 and 47? The ECU has

failed. Replace

the ECU.

Go to Step 2

Check the

battery ci rcui t.

Go to Step 2

2 Check that all the parts are mounted.

Is this step complete? Repeat the

“Diagnosis Flow". Return to Step 2

Chart B–1 The TOD switch A circuit wires are broken or short-circuited to the GND

Function of circuit —

Fail condition Even after the TOD switch position is selected from TOD to 2H, the indicator lamp status is

not changed.

Indicator lamp state

TOD switch position 2H

D04R100012

Table: Indicator Voltage

Step Action Yes No

1 1. Turn on the starter switch.

When the TOD switch is selected to the TOD position, is 0V

observ ed be twee n termi nal 3 0 a nd 47, an d 43 and 47? Does t he

voltage between the terminals 7 and 47, 19 and 47, and 8 and 47

comply with the TOD mode in the following table? Go to Step 2

Repair the TOD

switc h circuit.

Go to Step 4

2 When the TOD switch is selected to the 2H position, is 12 V

observed between terminals 30 and 47 and is 0V observed

between terminal 43 and 47? Does the voltage between the

termina ls 7 and 47, 19 and 47, and 8 and 47 compl y with the 2H

mode is the following table? Go to Step 3

Repair the TOD

switc h circuit.

Go to Step 4

3 When the TOD switch is selected to the 4L position, is 0V

observed between terminals 30 and 47 and is 12V observed

between terminal 43 and 47? Does the voltage between

termina ls 7 and 47, 19 and 47, and 8 a nd 47 comply with the 4L

mode in the followi ng table?

The phenom enon

is not reproduced.

Refer to “Trouble

intermittently

observed".

Repair the TOD

switc h circuit.

Go to Step 4

4 Check that all the parts are mounted.

Is this step complete? Verify the repair. Return to S tep 4

Unit: V

TOD

switch

mode

Terminals measured

Front 7 and

47 AUTO 19

and 47 Rear 8 and

2H 8.0 ∼ 14.5 8.0 ∼ 14.5 0

TOD000

4L 0 8.5 ∼ 14.5 0

Chart B–2 The TOD switch A circuit is shorted to battery.

Function of circuit —

Fail condition Even after the transfer mode is selected from 2H to TOD, the indicator lamp state does not

change.

Indicator lamp state

TOD switch position TOD

D04R100012

Table: Indicator terminal voltage

Step Action Yes No

1 1. Turn off the starter switch.

2. Disconnect the ECU connector (C–59).

Is the continuity established between the connector terminals (C–

59) 14 and (C–59) 7? Go to Step 2

Replace TOD

indica to r lam p

bulb.

Go to Step 6

2 Is the continuity established between the connector terminals (C–

59) 14 and (C–59) 19?

Go to Step 3

Replace TOD

indica to r lam p

bulb.

Go to Step 6

3 1. Turn off the starter switch and connect the ECU connector.

2. Turn on the starter switch.

When the TOD switch is selected to the TOD position, is 0V

observed between terminals 30 and 47, and 43 and 47? Does

the voltage between the terminals 7 and 47, 19 and 47, and 8

and 47 comply with the TOD mode in the following table? Go to Step 4

Repair the TOD

switc h circuit.

Go to Step 6

4 When the TOD switch is selected to the 2H position, is 12V

observed between terminals 30 and 47, and 0V observed

between terminals 43 and 47? Does the voltage between the

termina ls 7 and 47, 19 and 47, and 8 and 47 compl y with the 2H

mode in the followi ng table? Go to Step 5

Repair the TOD

switc h circuit.

Go to Step 6

5 When the TOD switch is selected to the 4L position, is 0V

observed between the terminal 30 and 47 and 12V observed

between t he terminal 43 and 47? Do es the voltage betwee n the

termina ls 7 and 47, 19 and 47, and 8 a nd 47 comply with the 4L

mode in the followi ng table?

The

phenomenon is

not reprodu ce d.

Refer to

“Trouble

intermittently

observed".

Repair the TOD

switc h circuit.

Go to Step 6

6 1. Check that all the parts are mounted.

Is this step complete? Verify repair. Go to Step 6

Unit: V

TOD

switch

mode

Terminals measured

Front 7 and

47 AUTO 19

and 47 Rear 8 and

2H 8.0 ∼ 14.5 8.0 ∼ 14.5 0

TOD000

4L 0 8.0 ∼ 14.5 0

Chart B–3 The TOD switch B circuit is shorted to GND or broken.

Function of circuit —

Fail condition Even after the transfer mode is selected from TOD to 4L, the indicator lamp state does not

change.

Indicator lamp state

TOD switch position 4L

D04R100012

Table: Indicator terminal voltage

Step Action Yes No

1 1. Turn on the starter switch.

When the TOD switch is selected to the TOD position, is 0V

observed between terminals 30 and 47, and 43 and 47? Does

the voltage between the terminals 7 and 47, 19 and 47, and 8

and 47 comply with the TOD mode in the following table? Go to Step 2

Repair the TOD

switc h circuit.

Go to Step 4

2 When the TOD switch is selected to the 2H position, is 12V

observed between terminals 30 and 47, and 0V observed

between terminals 43 and 47? Does the voltage between the

termina ls 7 and 47, 19 and 47, and 8 and 47 compl y with the 2H

mode in the followi ng table? Go to Step 3

Repair the TOD

switc h circuit.

Go to Step 4

3 When the TOD switch is selected to the 4L position, is 0V

observed between the terminal 30 and 47 and 12V observed

between t he terminal 43 and 47? Do es the voltage betwee n the

termina ls 7 and 47, 19 and 47, and 8 a nd 47 comply with the 4L

mode in the followi ng table?

The

phenomenon is

not reprodu ce d.

Refer to

“Trouble

intermittently

observed".

Repair the TOD

switc h circuit.

Go to Step 4

4 1. Check that all the parts are mounted.

Is this step complete? Verify repair. Go to Step 4

Unit: V

TOD

switch

mode

Terminals measured

Front 7 and

47 AUTO 19

and 47 Rear 8 and

2H 8.0 ∼ 14.5 8.0 ∼ 14.5 0

TOD000

4L 0 8.0 ∼ 14.5 0

Chart B–4 The TOD switch B circuit is shorted to battery.

Function of circuit —

Fail condition Even after the transfer mode is selected from 4L to TOD, the indicator lamp state does not

change.

Indicator lamp state

TOD switch position TOD

D04R100012

Table: Indicator terminal voltage

Step Action Yes No

1 1. Turn off the starter switch.

2. Disconnect the ECU connector (C–59).

Is the continuity established between the connector terminals (C–

59) 14 and (C–59) 19? Go to Step 2

Replace TOD

indica to r lam p

bulb.

Go to Step 5

2 1. Turn off the starter switch and connect the ECU connector.

2. Turn on the starter switch.

When the TOD switch is selected to the TOD position, is 0V

observed between terminals 30 and 47, and 43 and 47? Does

the voltage between the terminals 7 and 47, 19 and 47, and 8

and 47 comply with the TOD mode in the following table? Go to Step 3

Repair the TOD

switc h circuit.

Go to Step 5

3 When the TOD switch is selected to the 2H position, is 12V

observed between terminals 30 and 47, and 0V observed

between terminals 43 and 47? Does the voltage between the

termina ls 7 and 47, 19 and 47, and 8 and 47 compl y with the 2H

mode in the followi ng table? Go to Step 4

Repair the TOD

switc h circuit.

Go to Step 5

4 When the TOD switch is selected to the 4L position, is 0V

observed between the terminal 30 and 47 and 12V observed

between t he terminal 43 and 47? Do es the voltage betwee n the

termina ls 7 and 47, 19 and 47, and 8 a nd 47 comply with the 4L

mode in the followi ng table?

The

phenomenon is

not reprodu ce d.

Refer to

“Trouble

intermittently

observed".

Repair the TOD

switc h circuit.

Go to Step 5

5 1. Check that all the parts are mounted.

Is this step complete? Verify repair. Go to Step 5

Unit: V

TOD

switch

mode

Terminals measured

Front 7 and

47 AUTO 19

and 47 Rear 8 and

2H 8.0 ∼ 14.5 8.0 ∼ 14.5 0

TOD000

4L 0 8.0 ∼ 14.5 0

Chart C–1 4H switch circuit is short-circuited to GND.

Function of circuit —

Fail condition When the TOD switch is selected to 4L from TOD, all the indicator lamps are turned off.

Indicator lamp state

TOD switch position 4L

D04R100012

Step Action Yes No

1 1. Turn on the starter switch.

2. The car stops, the AT selector is N position and the brake is

applied.

When the TOD switch is changed to the TOD position, is 12V

observed between terminals 31 and 47 (4H switch)? Go to Step 2 Go to Step 9

2 1. The car stops the AT selector is N position and the brake is

applied.

When the TOD switch is changed to the 4L position, is 12V

observed between terminals 31 and 47 (4H switch)? Go to Step 3 Go to Step 9

3 1. Turn off the starter switch.

Is there the continuity terminal 14 and 7?

Go to Step 4

Replace the

TOD indicator

lamp bulb.

Go to Step 13

4 Is there the continuity between the terminals 14 and 19?

Go to Step 5

Replace the

TOD indicator

lamp bulb.

Go to Step 13

5 Is there the continuity between the terminal 14 and 8?

Go to Step 6

Replace the

TOD indicator

lamp bulb.

Go to Step 13

6 1. Turn on the starter switch.

2. The car stops the AT selector is N position and the brake is

applied.

When the TOD switch is changed to the 4L position, is 0V

observed between terminal 7 and 47? (for 2 seconds after the

starter switch ON)? Go to Step 7

The ECU has

frailed. Replace

the ECU.

Go to Step13

7 Is 0V observed between terminal 19 and 47? (for 2 seconds after

the starter switch ON)

Go to Step 8

The ECU has

failed. Replace

the ECU.

Go to Step 13

8 Is 0V observed betwe en terminal 8 an d 47? (for 2 sec onds after

the starter switch ON) The

phenomenon is

not reprodu ce d.

Refer to

“Trouble

intermittently

observed".

The ECU has

failed. Replace

the ECU.

Go to Step 13

9 1. T he car stops, the AT select or is N posit ion, and the bra ke is

applied.

2. The TOD switch is changed to the TOD (or 2H) position.

3. Turn off the starter switch.

4. Disconnect the ECU connector (C–60).

Is there the continuity between the connector (C–60) terminal 9

and 25? Go to Step 11 Go to Step 10

10 1. Connect the ECU connector (C–60) and turn on the starter

switch.

2. T he car stops, the AT sele ctor is N posit ion, and the bra ke is

applied.

3. Change the TOD switch to the 4L position.

4. Turn off the starter switch and di scon nec t the E CU con nector

(C–60).

Is there the continuity between the connector (C–60) terminal 9

and 25? Go to Step 11

The ECU has

failed. Replace

the ECU.

Go to Step 13

11 1. Disconnect the connector (H–38).

Is the continuity established between the transfer connector

terminals (H–38)4 and (C–60) 9?

Go to Step 12

The harness is

broken between

terminal (H–38)

4 and (C–60) 9.

Repair the

circuit.

Go to Step 13

12 1. Connect the connector (H–38).

2. Disconnect the connector (A–1).

Is there the continuity between the connector terminal (A–1) 4

and (C–60) 9?

Repair the

transfer.

Go to Step 13

The harness

between the

connector

terminal (C–60)

9 and (A–1) 4 is

short-circuited

to GND.

Repair the

circuit.

Go to Step 13

13 Check that all the parts are mounted.

Is this step complete? Verify the repair. Return to Step 13

Step Action Yes No

Chart D–1 4L switch circuit wires are broken or the battery circuit is short-circuited.

Function of circuit —

Fail condition When the TOD switch is changed to the 4L position, the indicator 4L mode goes on and

off.

Indicator lamp state

TOD switch position 4L

D04R100012

Step Action Yes No

1 1. Turn on the starter switch.

2. The car stops, the AT selector is the N position, and the brake

is applied.

When the TOD switch is changed to the TOD (or 2H) pos ition, is

12V observed between terminals 44 and 47 (4L switch)? Go to Step 2 Go to Step 4

2 1. The car stops, the AT selector is the N position, and the brake

is applied.

When the TOD switch is changed to the 4L position, does the

transfer become the 4L state? Go to Step 3 Refer to “Diagnosis

from symptom".

3 Is 0V observed between the terminal 44 and 47? The ECU has

failed. Replace

the ECU.

Go to Step 10 Go to Step 4

4 1. The car stops, the AT selector is the N position, and the brake

is applied.

When the TOD switch is changed to the TOD (or 2H) pos ition, is

12V observed between the connector (C–60) terminal 22 and

25? Go to Step 5 Go to Step 6

5 1. Turn off the starter switch and connect the EUC connector.

2. The car stops, the AT selector is the N position, and the brake

is applied.

When the TOD switch is changed to the 4L position, is 0V

observed between terminals (C–60) 22 and (C–60) 25 (4L

switch)?

The

phenomenon is

not reprodu ce d.

Refer to

“Trouble

intermittently

observed". Go to Step 6

6 1. Turn off the starter switch and connect ECU connector.

2. Turn on the starter switch.

3. The car stops, the AT selector is the N position, and the brake

is applied.

4. Change the TOD switch to the TOD (or 2H) position.

5. After the transfer has changed to the TOD (or 2H) mode, turn

off the starter switch and disconnect the ECU connector (C–

60).

Is ther e the contin uity between the c onnector (C–6 0) term inal 22

and 25? Go to Step 9 Go to Step 7

7 1. Turn off the starter switch and connect the ECU connector.

2. Turn on the starter switch.

3. The car stops, the AT selector is the N position, and the brake

is applied.

4. Change the TOD switch to the 4L position.

5. After the transfer has changed to the 4L mode, turn off the

starter switch.

6. Disconnect the ECU connector.

Is ther e the contin uity between the c onnector (C–6 0) term inal 22

and 25?

The

phenomenon is

not reprodu ce d.

Refer to

“Trouble

intermittently

observed". Go to Step 8

8 1. Turn off the starter switch and connect the ECU connector.

2. Turn on the starter switch.

3. The car stops, the AT selector is the N position, and the brake

is applied.

4. Change the TOD switch to the TOD (or 2H) position.

5. After the transfer has changed to the TOD (or 2H) mode, turn

off the starter switch.

6. Disconnect the transfer connector (A–1).

Is there the continuity between the connector terminal (A–1) 12

and GND?

Repair the

transfer.

Go to Step 10

Repair the

circuit between

(C–60) 22 and

(A–1) 12.

Go to Step 10

9 1. Turn off the starter switch and connect the connector (A–1).

2. Turn on the starter switch.

3. T he car stops, the AT sele ctor is N posit ion, and the bra ke is

applied.

4. Change the TOD switch to the 4L position.

5. After the transfer has changed to the 4L mode, turn off the

starter switch.

6. Disconnect the transfer connector (A–1).

Is there the continuity between the connector terminal (A–1) 12

and GND?

Repair the

circuit between

(C–60)22 and

(A–1)12.

Go to Step 10

Repair the

transfer.

Go to Step 10

10 Check that all the parts are mounted.

Is this step complete? Verify the repair. Go to Step 10

Step Action Yes No

Chart D–2 The 4L switch circuit is short-circuited to GND.

Function of circuit —

Fail condition When the TOD switch is changed to the 2H or TOD position, the indicator mode goes on

and off.

Indicator lamp state

TOD switch position 2H or TOD

D04R100012

Step Action Yes No

1 1. The car stops, the AT selector is the N position, and the brake

is applied.

When the TOD switch is changed to the TOD (or 2H) pos ition, is

12V observed between terminals 44 and 47 (4L switch)? Go to Step 2 Go to Step 3

2 1. The car stops, the AT selector is the N position, and the brake

is applied.

When the TOD switch is changed to the 4L position, is 0V

observed between terminals 44 and 47 (4L switch)?

Refer to “Trouble

intermittently

observed". Go to Step 3

3 1. The car stops, the AT selector is the N position, and the brake

is applied.

2. Select the TOD switch to the TOD (or 2H) position.

Is ther e the contin uity between the c onnector (C–6 0) term inal 22

and 25? Go to Step 5 Go to Step 4

4 1. Connect the ECU connector (C–60) and turn on the starter

switch.

2. The car stops, the AT selector is the N position, and the brake

is applied.

3. Select the TOD switch to the 4L position.

4. Turn off the starter switch and di scon nec t the E CU con nector

(C–60).

Is ther e the contin uity between the c onnector (C–6 0) term inal 22

and 25?

The ECU has

failed. Replace

the ECU.

Go to Step 9 Go to Step 5

5 1. Connect the ECU connector (C–60) and turn on the starter

switch.

2. The car stops, the AT selector is the N position, and the brake

is applied.

3. Select the TOD switch to the TOD (or 2H) position.

4. Turn off the starter switch and disconnect the connector (H–

38).

Is there the continuity between the connector terminal (H–38) 5

and (C–60) 25? Go to Step 7 Go to Step 6

6 1. Connect the connector (H–38) and turn on the starter switch.

2. The car stops, the AT selector is the N position, and the brake

is applied.

3. Select the TOD switch to the 4L position.

4. After the transfer has changed to the 4L mode, turn off the

starter switch and disconnect the connector (H–38).

Is there the continuity between the connector terminal (H–38) 5

and (C–60) 25? Go to Step 7

GND is

short-circuited

between

terminals (C–

60) 2 and (H–

38) 5. Repair

the circuit.

Go to Step 9

7 1. Connect the connector (H–38) and turn on the starter switch.

2. The car stops, the AT selector is the N position, and the brake

is applied.

3. Select the TOD switch to the TOD (or 2H) position.

4. After the transfer has changed to the TOD (or 2H) mode, turn

off the starter switch and disconnect the connector (A–1).

Is there the continuity between the connector terminal (A–1) 12

and GND?

Repair the

transfer.

Go to Step 9 Go to Step 8

8 1. Connect the connector (A–1) and turn on the starter switch.

2. The car stops, the AT selector is the N position, and the brake

is applied.

3. Select the TOD switch to the 4L position.

4. After the transfer has changed to the 4L mode, disconnect

the connector (A–1).

Is there the continuity between the connector terminal (A–1) 12

and GND?

GND is

short-circuited

between

termi nals (A –1)

12 and (H–38)

5. Repair the

circuit.

Go to Step 9

Repair the

transfer.

Go to Step 9

9 Check that all the parts are mounted.

Is this step complete? Verify the repair. Go to Step 9

Step Action Yes No

D04R100013

Chart E–1 AXLE switch circuit wires are broken.

Function of circuit —

Fail condition Both the TOD and 4L modes are disabled. (The transition status is not removed.)

Indicator lamp state

TOD switch position TOD 4L

Step Action Yes No

1 Start the engine.

When the TOD switch is selected to the TOD position, is 0V

observed between terminals 42 and 47? Go to Step 2 Go to Step 4

2 1. T he car stops, the AT select or is N posit ion, and the bra ke is

applied.

2. Select the TOD switch to the 4L position.

Is 0V observed between terminals 42 and 47? Go to Step 3 Go to Step 4

3 1. T he car stops, the AT select or is N posit ion, and the bra ke is

applied.

When the TOD switch is selected to the 4L position, is 12V

observed between the terminal 19 and 47?

The

phenomenon is

not reprodu ce d.

Refer to

“Troubles

intermittently

observed".

The ECU has

failed. Replace

the ECU.

Go to Step 8

4 1. T he car stops, the AT select or is N posit ion, and the bra ke is

applied.

When the TOD switch is selected to the 2H position, is the

battery voltage observed between the terminal 23 and 47. Go to Step 5 Go to Step 7

5 When the TOD switch is selected to the TOD position (TOD

mode), is 0 ∼ 1V observed between terminals 23 and 47? Go to Step 6 Go to Step 7

6 1. T he car stops, the AT select or is N posit ion, and the bra ke is

applied.

When the TOD switch is selected to the 4L position, is 0V

observed between terminals 23 and 47?

Repair the

circuit or check

the “Front Axle

Disconnect".

(Refer to

section 4B)

Go to Step 8 Go to Step 7

7 Is any of the trouble codes 28 (P1760), 32 (P1761) and 33

(P1 7 62) recorde d? Examine the

trouble based on

“Diagnosis from

Trouble Codes".

The ECU has

failed. Replace

the ECU.

Go to Step 8

8 Check that all the parts are mounted.

Is this step complete? Verify the repair. Go to Step 8

D04R100013

Chart E–2 The AXLE switch circuit is short-circuited to GND.

Function of circuit —

Fail condition Even after the TOD switch is selected to the 2H position, the 2H mode is not enabled. (The

transition status is not removed.)

Indicator lamp state

TOD switch position 2H

Step Action Yes No

1 Start the engine.

When the TOD switch is selected to the TOD position, is 0V

observed between terminals 42 and 47? Go to Step 2 Go to Step 6

2 1. T he car stops, the AT select or is N posit ion, and the bra ke is

applied.

When the TOD switch is selected to the 4L position, is 0V

observed between terminals 42 and 47? Go to Step 3 Go to Step 6

3 1. T he car stops, the AT select or is N posit ion, and the bra ke is

applied.

2. Select the TOD switch to the 2H position.

Is 5V observed between terminals 42 and 47? Go to Step 4 Go to Sep 6

4 Is 12V observed between terminals 7 and 47?

Go to Step 5

Replace the

ECU.

Go to Step 10

5 Is 12V observed between terminals 19 and 47? The

phenomenon is

not reprodu ce d.

Refer to

“Troubles

intermittently

observed".

The ECU has

failed. Replace

the ECU.

Go to Step 10

6 1. T he car stops, the AT select or is N posit ion, and the bra ke is

applied.

When the TOD switch is selected to the 2H position, is the

battery voltage observed between terminals 23 and 47? Go to Step 7 Go to Step 9

7 1. T he car stops, the AT select or is N posit ion, and the bra ke is

applied.

When the TOD switch is selected to the TOD position, is 0V

observed between terminals 23 and 47? Go to Step 8 Go to Step 9

8 1. T he car stops, the AT select or is N posit ion, and the bra ke is

applied.

When the TOD switch is selected to the 4L position, is 0V

observed between terminals 23 and 47?

Repair the

circuit or check

the “Front Axle

Disconnect".

(Refer to

section 4B)

Go to Step 10 Go to Step 9

9 Is any of the trouble codes 28 (P1760), 32 (P1761) and 33

(P1 7 62) recorde d? Examine the

trouble based on

“Diagnosis from

Trouble Codes".

The ECU has

failed. Replace

the ECU.

Go to Step 10

10 Check that all the parts are mounted.

Is this step complete? Verify the repair. Go to Step 10

Chart G The trouble codes are displayed.

Function of circuit —

Fail condition

Indicator lamp state

TOD switch position —

D04R100011

Step Action Yes No

1 Disconnect the ECU connector from ECU.

Is there the continuity established between terminals (C–60)7

and (C–60)25? Go to Step 2

The ECU has

failed. Replace

the ECU.

Go to Step 3

2 Is the self-diagnostic connector short-circuited?

Go to Step 3

Open the

self-diagnostic

connector.

Go to Step 3

3 1. Check that all the parts are mounted.

2. Clear the trouble codes.

Is this step complete? Verify the repair. Go to Step 3

D04R100011

Chart H Lighting switch circuit

Function of circuit Reads in the status of lighting switch, and reduces the indicator at night.

Fail condition Even if the lighting switch is pressed on and off, brightness does not change.

Indicator lamp state

TOD switch position All position (exsample TOD mode)

Step Action Yes No

1 1. Turn on the starter switch.

2. Turn off the lighting switch.

Is 0V observed between the EUC terminal 40 and 47?

Go to Step 2

Lighting switch

battery circuit

short. Repair

the circuit.

Go to Step 4

2 Turn lighting switch “ON".

Is the battery voltage observed between ECU terminal 40 and

47?

Go to Step 3

Wires are

broken in

lighting switch

circuit. Repair

the circuit.

Go to Step 4

3 While the lighting switch is pressed on and off, does the

brightness of the indicator change? The phenomenon

is not reproduced.

Refer to “Troubles

intermittently

observed"

The ECU has

failed. Replace

the ECU.

Go to Step 4

4 Check that all the parts are mounted.

Is this step complete? Verify the repair. Go to Step 4

DIAGNOSIS FROM SYMPTOM

Tr oubl es that are n ot in dicate d by th e war ning l amp are

listed in the table below. These troubles are caused by

the faults that canno t be detected by the se lf-diagn ostic

function of the control unit.

If this type of trouble is observed, interview the

customer and conduct test runs to reproduce the

trouble, cross-check the reported trouble with the listed

phenomena, and diagnose and analyze the trouble on

the item by item basis.

Phenomen a Major cause Corre cti ve actio n

1 The tight corner braking is observed

when the vehicle is subject to full

steering.

• The standard tires are not used.

• The tire pressure is incorrect.

• The tires are worn inuniformity.

• The transfer or wiring is imperfect.

• T he limi ted sl ip differe nti al is

failed.

Check and recondition the

vehicle according to Chart 1.

2 Even if the TOD switch is selected to

the TOD position, the F4WD mode is

not active, resulting in remarkable

rear wheel spin.

• The transfer or wiring is imperfect.

• The shift on the fly system is

failed.

Check and recondition the

vehicle according to Chart 2.

3 • When the TOD switch is selected

to the TOD position, the drive

resistance of the F4WD system is

too large to get sufficient runni ng

speed.

• Noised drive line.

• The standard tires are not used.

• The tires are worn inuniformity.

• The transfer or wiring is imperfect.

• T he limi ted sl ip differe nti al is

failed.

Check and recondition the

vehicle according to Chart 1.

4 The shift on the fly system (front axle

disconnect) generates gear noises. • The wiring is imperfect.

• The shift on the fly system is

failed.

Check and recondition the

vehicle according to Chart 3.

5 The braking distance gets long even

when the ABS is active. • The wiring is imperfect.

• The ABS is failed. Check and recondition the

vehicle according to Chart 4.

6 The transfer does not change to the

low range from the high range. • The transfer or wiring is imperfect.

• The TOD switch is imperfect.

• The AT inhibitor switch is

imperfect.

• The brake switch is imperfect.

• The engine speed signal is

imperfect.

• The speed sensor is imperfect.

Check and recondition the

vehicle according to chart 5.

7 The transfer does not change to the

high range from the low range. Check and recondition the

vehicle according to chart 6.

8 The transfer stays neutral and the

vehicle does not run. • The transfer is imperfect. Check and recondition the

vehicle according to chart 7.

D04R100010

Chart 1 The tight corner braking is observed.

Function of circuit —

Fail condition When the vehicle is subject to full steering in the TOD mode, the drive resistance gets

large or the judder occurs. Otherwise, the above phenomenon is observed only when the

brake is app lied.

Step Action Yes No

1 Are the front and rear tires in specified size?

Go to Step 2

Replace the

tires with

specified ones,

and service the

new tires.

Go to Step 16

2 Is the tire pressure correct?

Go to Step 3

Inflate the tires

with specified

pressure.

Go to Step 16

3 Are the tires free from abnormal wear?

Go to Step 4

Replace the

tires with

specified ones,

and service the

new tires.

Go to Step 16

4 Are different types of tires used?

Go to Step 5

Replace the

tires with

specified ones,

and service the

new tires.

Go to Step 16

5 1. Start the engine.

2. Sele ct the TOD switch to the TOD position.

3. F ully turn the ste erin g to the left (or righ t) end, and select the

D range and start the creep run.

Does the tight corner braking occur? Is the judder with chug-chug

sound observed? *Use caution on the operation. Go to Step 6 Go to Step 11

6 1. Select the TOD switch to the 2H position.

2. F ully turn the ste erin g to the left (or righ t) end, and select the

D range and start the creep run.

Does the tight corner braking occur? Is the judder with chug-chug

sound observed? *Use caution on the operation. Go to Step 7 Go to Step 14

7 Is an LSD mounted to the rear differential? Go to Step 8 Go to Step 9

8 Is the genuine LSD oil used in the rear differential?

Go to Step 9

Replace the

differential oil.

Go to Step 16

9 Does the engine output the power correctly?

Go to Step 10

Check the

engine.

Go to Step 16

10 Do the speed sensors work correctly? (Check trouble codes.) The ECU has

failed. Replace

the ECU.

Go to Step 16

Replace the

speed se nso r s.

Go to Step 16

11 Is the tight corner braking observed only when the brake is

applied?

Go to Step 12

Conduct full

steering under

WOT.

Go to Step 5

*NOTE: Before ch ecki ng this item, r un the v ehicle m ore

than 10 meters with the steering wheel in straight

position so that the 4L mechanical lock sleeve can be

released certainly.

12 1. Turn on the starter switch.

Is 8 ∼ 10 V observed between terminals 33 and 47?

Go to Step 13

Repair the

circuit of the

ECU connector

terminal 33

(ABS IN).

Go to Step 16

13 1. Apply the br ak e and fully turn the stee ri ng to the le ft (or right)

end, and start the creep run.

Does the voltage between terminals 11 and 22 range between

0.1 and 1.0V?

Repair the

transfer

assembly.

Go to Step 16

The ECU has

failed. Replace

the ECU.

Go to Step 16

14 1. Select the TOD switch to the TOD position.

2. F ully turn the ste erin g to the left (or righ t) end, and select the

D range and start the creep run.

Does the voltage between terminals 11 and 22 range between

0.1 and 1.0V? Go to Step 15 Go to Step 10

15 1. Select the TOD switch to the 2H position.

2. Jack up the right front wheel.

Does the front tire rotate smoothly?

The phenom enon

is not reproduced.

Refer to “Troubles

intermittently

observed".

Repair the

transfer

assembly.

Go to Step 16

16 Check that all the parts are mounted.

Is this step complete? Verify the repair Go to Step 16

Step Action Yes No

D04R100010

Chart 2 The TOD mode is not active.

Function of circuit —

Fail condition The rear wheels spin in the TOD mode, so the driving torque is not transmitted to the front

wheels. The indicator lamps will not show the 4L and TOD status.

Step Action Yes No

1 Is the trouble code 31(P1721) recorded? Examine the

trouble based on

“Diagnosis from

Trouble Codes". Go to Step 2

2 Is any of the trouble codes 28(P1760), 32(P1761) and 33(P1762)

recorded? Examine the

trouble based on

“Diagnosis from

Trouble Codes". Go to Step 3

3 When the T OD swit ch is sele ct ed to th e sp ec ifi ed posi t io n, do the

TOD indicator lamps show the correct status?

Go to Step 4

Exami ne the

trouble based on

“Trouble Diagnosis

Depending on The

Status of TOD

Indicator".

4 Select the TOD switch to the 4L position, fully turn the steering to

the left (or right) end, and start the creep run. Does the tight

corner braking occur? Go to Step 5

Repair the

transfer

assembly.

Go to Step 7

5 1. Select the TOD switch to the TOD position.

2. Turn on the starter switch.

Does the voltage between terminals 11 and 22 indicate at least

3V while the throttle is completely open? Go to Step 6

The ECU has

failed. Replace

the ECU.

Go to Step 7

6 Does the voltage between terminals 11 and 22 indicate at least

0.1V while the throttle is completely closed? The TOD clutch

is worn. Repair

the transfer

assembly.

Go to Step 7

The ECU has

failed. Replace

the ECU.

Go to Step 7

7 Check that all the parts are mounted.

Is this step complete? Verify the repair. Go to Step 7

D04R100010

Chart 3 The shift on the fly system generates gear noises.

(The fuel economy is bad in the 2H mode.)

Function of circuit —

Fail condition When the vehicle is run in the 2H mode, the shift on the fly system generates gear noises

or the front wheel gears are engaged to generate a shock.

Step Action Yes No

1 Do the indicator lamps show the correct status?

Go to Step 2

Exami ne the

trouble based on

“Trouble Diagnosis

Depending on the

Status of TOD

Indicator".

2 Is any of the trouble codes 28(P1760), 32(P1761) and 33(P1762)

recorded? Examine the

trouble based on

“Diagnosis from

Trouble Codes". Go to Step 3

3 Turn on the starter switch.

Is the battery voltage observed between terminals 14 and 47? Go to Step 4 Go to Step 5

4 When the TOD Switch is selected to the 2H position, are the front

axle gears correctly disengaged (and when the left front tire is

jacked up and turned, is the front propeller shaft standstill)?

The phenom enon

is not reproduced.

Refer to “Trouble

intermittently

observed".

The shift on t h e f ly

system is failed

(refer to Section

4B1 and 4C).

5 Do es the batt er y voltage maintain the correct level?

Repair the

battery circuit.

Go to Step 6

Repair the

battery and

charging

system.

Go to Step 6

6 Check that all the parts are mounted.

Is this step complete? Verify the repair. Go to Step 6

D04R100010

Chart 4 The braking distance gets long even when the ABS is active.

Function of circuit —

Fail condition Enough deceleration is not obtained and the braking distance gets long even when the

ABS is active in the 2H mode.

Step Action Yes No

1 Are the brake and ABS systems healthy?

Go to Step 2

Repair the brake

and ABS. (Refer to

section 5A and 5B)

2 Turn on the starter switch.

Is the battery voltage observed between terminals 14 and 47? Go to Step 3

Repair the

battery system.

Go to Step 5

3 1. Select the TOD switch to the 2H position.

Does the voltage between terminals 36 and 47 range between

7.5 and 16V (0.12 seconds make a cycle)? Go to Step 4

The ECU has

failed. Replace

the ECU.

Go to Step 5

4 1. Turn off the starter switch.

2. Disconnect the connector (C–60).

Is ther e the contin uity between the c onnector term inal (C–60) 14

and (C–4) 8?

The

phenomenon is

not reprodu ce d.

Refer to

“Trouble

intermittently

observed".

Repair the

harness.

Go to Step 5

5 Check that all the parts are mounted.

Is this step complete? Verify the repair. Go to Step 5

D04R100014

Chart 5 The transfer does not change to low from high.

Function of circuit —

Fail condition When the TOD switch is selected to the 4L position, the transfer does not change to the

low range.

Step Action Yes No

1 1. Turn on the starter switch.

Is any of the trouble codes 41 (P1741), 42 (P1773), 43 (P1743)

and 55 (P1755) recorded?

Examine the

trouble based on

“Diagnosis from

Trouble Codes". Go to Step 2

2 Is any of the troub le codes 13 (P1735 ), 14 (P1731), 15 (P17 36),

16 (P1737), 24 (P1733), and 27 (P1738) recorded? Examine the

trouble based on

“Diagnosis from

Trouble Codes". Go to Step 3

3 Is the trouble code 17 (P1774) recorded? Examine the

trouble based on

“Diagnosis from

Trouble Codes". Go to Step 4

4 1. Turn on the starter switch.

2. The car stops, engine speed is less than 1500 rpm, the AT

selector is N position, and select the TOD switch to the 4L

position.

Do the front lamp and rear lamp in the indicator blink? Go to Step 5

Exami ne the

trouble based on

“Trouble Diagnosis

Depending on the

Status of TOD

Indicator".

5 1. Step on the brake pedal.

Is the transfer changed to the 4L mode? The phe nomenon

is not reproduced.

Refer to “Trouble

intermittently

observed". Go to Step 6

6 When the vehicle is moved forth and back, is the transfer

changed to the 4L mode? The phenom enon

is not reproduced.

Refer to “Trouble

intermittently

observed". Go to Step 7

7 Does the continuity corresponding to the encoder position

between the terminals comply with the 4L position in the following

table (continuity)?

Examine the

trouble based on

“Trouble diagnosis

Depending on The

Status of TOD

Indicat or ". Go to Step 8

8 1. Step on the brake pedal.

Is the battery voltage observed between the terminal 37 and 47? Go to Step 10 Go to Step 9

9 1. Turn off the starter switch.

2. Disconnect the ECU connector (C–60) and the brake switch

connector (I–31).

Is ther e the contin uity between the c onnector term inal (C–60) 15

and (I–31) 4?

The brake

switch is

abnormal.

Repair or

repla ce the

brake switch.

Go to Step 13

Repair the

harness.

Go to Step 13

10 1. Select the AT selector to the N position.

Is the voltage between the terminals ranged within the following

table (voltage)? Go to Step 12 Go to Step 11

11 1. Turn off the starter switch.

2. Disconnect the ECU connector (C–60).

3. Disconnect the AT mode switch connector (E–53).

Is there the continuity between the following connector

terminals? (C–60)6 and (E–53)8 (C–60)19 and (E–53)7 (C–

60)5 and (E–53)6

Repair or

replace the AT

mode switch.

Go to Step 13

Repair the

circuit which

has no

continuity.

Go to Step 13

Continuity between terminal in 4L position (Table:

continuity)

Standar d (Tab le: volta ge)

12 1. Start the engine.

Is the engine pulse signal between terminal 2 and 47 at engine

speed under 1500 rpm within the standard? Standard: less than

4500 Hz Replace the

ECU.

Go to Step 13

The engine

pul se signa l is

abnormal.

Repair or

replace the

PCM.

Go to Step 13

13 Check that all the parts are mounted.

Is this step complete? Verify the repair. Go to Step 13

Step Action Yes No

Terminal

s No. 26 and

24 39 and

24 25 and

24 38 and

Continuity

of 4L

position

YES NO YES YES or

Unit: V

Terminals 28 and 47 41 and 47 27 and 47

Voltage 0 12 0

D04R100014

Chart 6 The transfer does not change to high from low.

Function of circuit —

Fail condition When the TOD switch is selected to the TOD, the transfer does not change to the high

range.

Step Action Yes No

1 1. Turn on the starter switch.

Is any of the trouble codes 41 (P1741), 42 (P1773), 43 (P1743)

and 55 (P1755) recorded?

Examine the

trouble based on

“Diagnosis from

Trouble Codes". Go to Step 2

2 Is any of the troub le codes 13 (P1735 ), 14 (P1731), 15 (P17 36),

16 (P1737), 24 (P1733), and 27 (P1738) recorded? Examine the

trouble based on

“Diagnosis from

Trouble Codes". Go to Step 3

3 Is the trouble code 17 (P1774) recorded? Examine the

trouble based on

“Diagnosis from

Trouble Codes". Go to Step 4

4 1. Turn on the starter switch.

2. The car stops, engine speed is less than 1500 rpm, the AT

selector is N position, and select the TOD switch to the TOD

position.

Do the front, rear, and AUTO lamps in the indicato r blink ? Go to Step 5

Exami ne the

trouble based on

“Trouble Diagnosis

Depending on the

Status of TOD

Indicator".

5 1. Step on the brake pedal.

Is the transfer changed to the TOD mode? The

phenomenon is

not reprodu ce d.

Refer to

“Trouble

intermittently

observed". Go to Step 6

6 When the vehicle is moved forth and back, is the transfer

changed to the TOD mode? The phenom enon

is not reproduced.

Refer to “Trouble

intermittently

observed". Go to Step 7

7 Is the continuity corresponding to the encoder position between

the terminals ranged within the any case (case 1, 2 and 3) of

TOD position in the following table (continuity)?

Examine the

trouble based on

“Trouble diagnosis

Depending on The

Status of TOD

Indicat or ". Go to Step 8

8 1. Step on the brake pedal.

Is the battery voltage observed between the terminal 37 and 47? Go to Step 10 Go to Step 9

9 1. Turn off the starter switch.

2. Disconnect the ECU connector (C–60) and the brake switch

connector (I–31).

Is ther e the contin uity between the c onnector term inal (C–60) 15

and (I–31) 4?

The brake

switch is

abnormal.

Repair or

repla ce the

brake switch.

Go to Step 13

Repair the

harness.

Go to Step 13

10 1. Select the AT selector to the N position.

Is the voltage between the terminals ranged within the following

table (voltage)? Go to Step 12 Go to Step 11

Continuity in TOD position (Table: continuity)

Standar d (Tab le: volta ge)

11 1. Turn off the starter switch.

2. Disconnect the ECU connector (C–60) and brake switch

connector (I–31).

3. Disconnect the AT mode switch connector (E–53).

Is there the continuity between the following connector

terminals? (C–60)6 and (E–53)8 (C–60)19 and (E–53)7 (C–

60)5 and (E–53)6

Repair or

replace the AT

mode switch.

Go to St ep 13

Repair the

circuit which

has no

continuity.

Go to Step 13

12 1. Start the engine.

Is the engine pulse signal between terminal 2 and 47 at engine

speed under 1500 rpm within the standard? Standard: less than

4500 Hz Replace the

ECU.

Go to Step 13

The engine

pul se signa l is

abnormal.

Repair or

replace the

PCM.

Go to Step 13

13 Check that all the parts are mounted.

Is this step complete? Verify the repair. Go to Step 13

Step Action Yes No

Cas

eContinuity between terminals

26 and 24 39 and 24 25 and 24 38 and 24

1NO NO NO YES

2 NO YES NO YES

3 YES YES NO YES

Unit: V

Terminals 28 and 47 41 and 47 27 and 47

Voltage 0 12 0

Chart 7 The transfer does not change to low from high.

Function of circuit —

Fail condition When the TOD switch is selected to the 4L position, the transfer does not change to the

low position. (The transfer stays neutral and the vehicle does not run.)

Step Action Yes No

1 1. Turn on the starter switch.

2. Set the TOD switch to the any position.

Is the transfer changed to high or low? Go to Step 2 Go to Step 3

2 Is the transfer changed to high from low and the low from high? The phenomenon

is not reproduced.

Refer to “Trouble

intermittently

observed". Go to Step 3

3 Is any of the troub le codes 41 (P1741 ), 42 (P1773), 43 (P17 43),

and 55 (P1755) recorded? Examine the

trouble based on

“Diagnosis from

Trouble Codes".

The transfer is

abnormal.

Repair the

transfer.

Go to Step 4

4 Check that all the parts are mounted.

Is this step complete? Verify the repair. Go to Step 4