SECTION 6C1-2C - FUNCTIONAL CHECKS -
V6 ENGINE
IMPORTANT:
Before performing any Service Operation or other procedure described in this Section, refer to
Section 00 CAUTIONS AND NOTES in VX Service Information for correct workshop practices with
regards to safety and/or prope rty damage.
The f ollowing pages are to be used when there is a cus tomer c omplaint but there are no diagnostic trouble
codes set, but one or more of the Tech 2 scan tool data values are not within typical values. Before using
these Tables you should use the symptoms Tables that may lead you to using this Section.
The purpose of these Tables is to diagnosis Powertrain Control Module (PCM) controlled components or
subsystems that do not have diagnostic trouble codes assigned to them. Another purpose of these Tables
is for technicians who feel confident that a particular part of the subsystem is not operating properly and
wants to only check that particular item for proper operation without going through lengthy diagnostic
procedures.
4L60 E COMPONENT RESISTANCE TABLE
COMPONENT TERMINAL WIRE COLOUR PASS-THRU
CONNECTOR
TERMINAL
RESISTANCE AT
20 DEGREES C CIRCUIT NO.
1-2 SHIFT
SOLENOID VALVE B R E* 19-24 OHMS 339
A LG A 1222
2-3 SHIFT
SOLENOID VALVE A R E* 19-24 OHMS 339
B Y B 1223
3-2 CONTROL
SOLENOID VALVE A R E* 20-24 OHMS 339
B W S 897
PRESSURE
CONTROL
SOLENOID VALVE
A V C 3-5 OHMS 1228
B LBLU D 1229
TRANSMISSION
FLUID
TEMPERATURE
SENSOR (TFT)
A BR L 3088 - 3942 OHMS 1227
B GY M 469
TCC "PWM"
SOLENOID VALVE A R E* 9 - 14 OHMS 339
B BR U 418
TCC ENABLE
SOLENOID VALVE A R E* 21-26 OHMS 339
B B T 422
• Spliced internally to pin E
TABLE 2.1 V6 PCM AUTOMATIC TRANSMISSION WIRING
HARNESS ASSEMBLY CHECK
Tools Required:
J 39775 4L60-E Jumper Harness
J 39200 Digital Volt Multimeter (DVM)
J 35616 Connector Test Adapter Kit
IMPORTANT:
This procedure cannot be used for checking the Automatic Transmission Fluid Pressure Manual Valve
Position Switch (TFP Val. Position Sw.) circuit, or the
Automatic Transmission Fluid Temperature (TFT) Sensor circuit. Refer to TFP Valve Position Switch
Assembly Resistance Check, for those circuits.
Powertrain Harness Terminal Identification
CAVITY FUNCTION
A 1-2 SHI FT SOLENOID (LOW)
B 2-3 SHI FT SOLENOID (LOW)
C PRESS URE CONTROL SOLENOID (HIGH)
D PRESS URE CONT ROL SOLENOID (LOW)
E BOTH SHIFT SOLENOIDS , TCC SOLENOID, AND
3-2 CONTROL SOLENOID (HIGH)
L TRANSMISSION FLUID TEMPERATURE HIGH
CAVITY FUNCTION
M TRANSMISSION FLUID TEMPERATURE (LOW)
N RANGE SIGNAL "A"
P RANGE SIGNAL "C"
R RANGE SIGNAL "B"
S 3-2 CONTROL SOLENOID (LOW)
T TCC SOLENOI D (LOW)
U TCC PWM SOLENOID
W (897)
3–2
Control
Solenoid
TCC
PWM
Solenoid TCC
Solenoid
1–2
Shift
Solenoid
2–3
Shift
Solenoid
339 S
B
R (339)
A
EAAAA
BBBB D
D4 N. O.
D2 N. C.
4344
D3 N. C.
LO N. O.
Rev N. O.
E
C
B (418)
UT ABNRPM
BA
L
Range A Range B Range C
YB129
YB129
Trans.
Temp.
Sensor
Pressure
Control
Solenoid
Pressure
Switch
Assembly
CD
AB
B (422) LG (1222) Y (1223) P
(1224) BLU
(1225) O
(1226) GY
(452) BR
(1227) V
(1228) L BLU
(1229)
P.C.M CO NNECTOR 3
YB1 99
E1
F1
G
(842)
BLU
(841)
GY
(845)
Y
(846)
B/R
(750)
R
(1228)
G/W
(465)
V
(435)
GY/BLU
(1229)
(843)
V
(844)
BR/Y
(771)
BLU/W
(766)
W
(750)
B/R
Y
(772)
GY
(773)
BR/Y
(1224)
Y
(1225)
GY
(1226)
BLU
(774)
BLU/R
(31)
E16
F16
P
(39))
B/BLU
(1062)
(936)
BLU/O
YB 187
P.C.M CO NNECTOR 2
A1 A12
B1 B12
G/W
(897)
(1223)
Y/B
B/R
(750)
BR/W
(792)
LG/B
(366)
GY/BLU
(1434)
G/Y
(428)
BR
(418)
GY/R
(422)
LG
(1222)
W
(423)
T/B
(424)
B/R
(750)
B
(630)
LBLU/B
(647)
O
(1426)
V
(430)
B/R
(453)
B/W
(1427)
BLU/W
(304)
W/G
(937))
ENGINE CONNECTOR 1
YE110
O/W
(304)
(1426)
BLU/W
G/W
(339)
P/BLU
(465)
(123)
V/W
(1427)
B/W
Y
(1049)
TRANSMISSION CONNECTOR
GY/BLU
(1229)
R
(1228)
Y/B
(1223)
LG
(1222)
P/BLU
(339)
(1227)
B/Y
(1230)
B/W
GY/R
(422)
BR
(418)
BR/Y
(1224)
(1226)
GY
Y
(1225)
(897)
G/W
(V8)
B
(469) (V6)
OR
TABLE 2.1 V6 PCM AUTOMATIC TRANSMISSION WIRING HARNESS ASSEMBLY CHECK
STEP ACTION VALUE YES NO
1 1. Install the J 39775 Jumper Harness on the
transmission pass-thru connector.
2. Using a J 39200 DVM and a J 35616 Connector Test
Adapter Kit, measure the resistance between
terminals A and E (1-2 Shift Solenoid Valve).
Is the resistance within the specified range?
19-24 Ω
@ 20° C
24-31Ω
@ 100° C
Go to Step 3 Go to Step 2
2 1. Disconnect the 1-2 Shift Solenoid Valve (1-2 SS
Valve) from the Automatic Transmission Wiring
Harness Assembly.
2. Using the J 39200 DVM, measure the resistance of
the 1-2 SS Valve.
Is the resistance within the specified range?
19-24 Ω
@ 20° C
24-31Ω
@ 100° C
Go to Step 14 Go to Step 16
4 1. Disconnect the 2-3 Shift Solenoid Valve (2-3 SS
Valve) from the Automatic Transmission Wiring
Harness Assembly.
2. Using the J 39200 DVM, measure the resistance of
the 2-3 SS Valve.
Is the resistance within the specified range?
19-24 Ω
@ 20° C
24-31Ω
@ 100° C
Go to Step 14 Go to Step 16
5 Measure the resistance between terminals T and E
(Torque Converter Clutch Solenoid Valve).
Is the resistance within the specified range?
21-26 Ω
@ 20° C
26-33 Ω
@ 100° C
Go to Step 6 Go to Step 14
6 Measure the resistance between terminals U and E
(Torque Converter Clutch Pulse Width Modulation
Solenoid Valve).
Is the resistance within the specified range?
10-11 Ω
@ 20° C
13–15 Ω
@ 100° C
Go to Step 8 Go to Step 7
7 1. Disconnect the TCC PWM Solenoid. Valve from the
Automatic Transmission Wiring Harness Assembly.
2. Using the J 39200 DVM, measure the resistance of
the TCC PW M Solenoid. Valve.
Is the resistance within the specified range?
10-11 Ω
@ 20° C
13–15 Ω
@ 100° C
Go to Step 14 Go to Step 16
STEP ACTION VALUE YES NO
8 Measure the resistance between terminals S and E (3-2
Shift Solenoid Valve assembly).
Is the resistance within the specified range?
20-24 Ω
@ 20° C
29-32 Ω
@ 100° C
Go to Step 10 Go to Step 9
9 1. Disconnect the 3–2 Shift Solenoid Valve Assembly
(3-2 SS Valve Assy.) from the Automatic
Transmission Wiring Harness Assembly.
2. Using the J 39200 DVM, measure the resistance of
the 3-2 SS Valve Assy.
Is the resistance within the specified range?
20-24 Ω
@ 20° C
29-32 Ω
@ 100° C
Go to Step 14 Go to Step 16
10 Measure the resistance between terminals C and D
(Pressure Control Solenoid Valve).
Is the resistance within the specified range?
3-5 Ω
@ 20° C
4-7 Ω
@ 100° C
Go to Step 12 Go to Step 11
11 1. Disconnect the Pressure Control Solenoid Valve (PC
Sol. Valve) from the Automatic Transmission Wiring
Harness Assembly.
2. Using the J 39200 DVM, measure the resistance of
the PC Sol. Valve.
Is the resistance within the specified range?
3-5 Ω
@ 20° C
4-7 Ω
@ 100° C
Go to Step 14 Go to Step 16
12 Using the J 39200 DVM and the J 35616 Connector Test
Adapter Kit, measure the resistance from each of the
terminals A, B, C, D, E, S, T and U of the A/T Wiring
Harness Assembly at the transmission pass-thru
connector to the transmission case.
Is the resistance more than the specified value?
250k Ω System OK, exit
the table Go to Step 13
13 1. Disconnect the A/T Wiring Harness Assembly from all
the components.
2. Measure the resistance from each of the component
terminals to the transmission case.
Is the resistance more than the specified value?
250k Ω Go to Step 14 Go to Step 16
14 Inspect for high resistance or a short.
Inspect the A/T Wiring Harness Assembly at the
transmission pass-thru connector, and the component
connectors for the following conditions:
• Poor electrical connections
• Bent, backed-out, or damaged terminals
• Weak terminal tension
• A chafed wire that could short to bare metal or
other wiring
• A broken wire inside the insulation
• Moisture intrusion
• Corrosion
If diagnosing for a possible intermittent condition, move
or massage the A/T Wiring Harness Assembly while
observing the test equipment for a change.
Did you find and correct the high resistance or a short?
Verify the repair
Go to Step 1 Go to Step 15
15 Replace the Automatic Transmission Wiring Harness
Assembly. Refer to Service Operations in Section 7C-5
in VX Service Information.
Is the action complete?
Verify the repair
Go to Step 1
16 Replace the faulty component. Refer to Service
Operations in Section 6C1-3 of the VX Series Service
Information.
Is the action complete?
Verify the repair
Go to Step 1
TABLE 2.2 V6 PCM TRANSMISSION FLUID PRESSURE
MANUAL V ALVE POSITION SWITCH CHECK
Tools Required:
J 39775 4L60E Jumper Harness
J 39200 Digital Volt Multimeter
J 35616 Connector Test Adapter Kit
IMPORTANT: W henever the transm ission pass-thru connector is disconnected and the engine is running,
multiple DTCs will set. Be sure to clear these codes when you are finished with this procedure.
IMPORTANT: This procedure tests the Automatic Transmission Fluid Pressure Manual Valve Position
Switch (TFP Val. Position Sw.) circuits and the Automatic Transmission Fluid Temperature (TFT) Sensor
circuit. Do not use this procedure to test other Automatic Transm ission circuits, refer to 4L60–E Automatic
Transmission Internal Wiring Harness check.
P.C.M CO NNECTOR 3
YB1 99
E1
F1
G
(842)
BLU
(841)
GY
(845)
Y
(846)
B/R
(750)
R
(1228)
G/W
(465)
V
(435)
GY/BLU
(1229)
(843)
V
(844)
BR/Y
(771)
BLU/W
(766)
W
(750)
B/R
Y
(772)
GY
(773)
BR/Y
(1224)
Y
(1225)
GY
(1226)
BLU
(774)
BLU/R
(31)
E16
F16
P
(39))
B/BLU
(1062)
(936)
BLU/O
TRANSMISSION CONNECTOR
GY/BLU
(1229)
R
(1228)
Y/B
(1223)
LG
(1222)
P/BLU
(339)
(1227)
B/Y
(1230)
B/W
GY/R
(422)
BR
(418)
BR/Y
(1224)
(1226)
GY
Y
(1225)
(897)
G/W
(V8)
B
(469) (V6)
OR
VXPCM034
PCM
F11
F12
D13
D6
TFP SIGNAL A
TFP SIGNAL B
TRANSMISSION FLUID
TEMPERATURE (TFT)
SENSOR SIGNAL
SENSOR EARTH
N
C
R
E
D
A
B
P
L
M
TRANSMISSION FLUID
TEMPERATURE
(TFT) SENSOR
AUTOMATIC TRANSMISSION FLUID
PRESSURE SWITCH ASSEMBLY
BR/Y (1224)
Y (1225)
GY (1226)
B/Y (1227)
B (46 9 )
12V
12V
5V
F13 TF P SIGNAL C
12V
M
I
C
R
O
TO
A/C PRESSURE SENSOR
AND IAT SENSOR
YB199
YB187
YB198
YB129
TABLE 2.2 V6 PCM TRANSMISSION FLUID PRESSURE MANUAL VALVE POSITION SWITCH CHECK
STEP ACTION VALUE YES NO
1 1. Install the J 39775 Jumper Harness on the
transmission side of the pass-thru connector.
2. Using the J 39200 DVM and the J 35616 Connector
Test Adapter Kit, measure the resistance from
terminal N to the transmission case.
Is the resistance greater than the specified value?
50 k Ω Go to Step 3 Go to Step 2
2 1. Disconnect the TFP Value Position Switch from the
A/T W iring Harness Assembly.
2. Measure the resistance from terminal C of the TFP
Value Position Switch to the switch housing.
Is the resistance greater than the specified value?
50 k Ω Go to Step 16 Go to Step 19
3 Measure the resistance from terminal R to the
transmission case.
Is the resistance less than the specified value?
200 Ω Go to Step 5 Go to Step 4
4 1. Disconnect the TFP Value Position Switch from the
A/T W iring Harness Assembly.
2. Measure the resistance from terminal E of the TFP
Value Position Switch to the switch housing.
Is the resistance less than the specified value?
200 Ω Go to Step 16 Go to Step 19
5 Measure the resistance from terminal P to the
transmission case.
Is the resistance greater than the specified value?
50 k Ω Go to Step 7 Go to Step 6
6 1. Disconnect the TFP Value Position Switch from the
A/T W iring Harness Assembly.
2. Measure the resistance from terminal D of the TFP
Value Position Switch to the switch housing.
Is the resistance greater than the specified value?
50 k Ω Go to Step 16 Go to Step 19
7 1. Start the engine.
2. Allow the engine to idle.
3. Set the parking brake.
4. Place the gear selector in Reverse.
5. Measure the resistance from terminal N to the
transmission case.
Is the resistance less than the specified value?
200 Ω Go to Step 8 Go to Step 16
8 1. Place the gear selector in Low (D1).
2. Measure the resistance from terminal N to the
transmission case.
Is the resistance less than the specified value?
200 Ω Go to Step 9 Go to Step 16
9 1. Place the gear selector in Manual Third (D3).
2. Measure the resistance from terminal R to the
transmission case.
Is the resistance greater than the specified value?
50 k Ω Go to Step 10 Go to Step 16
10 1. Place the gear selector in Drive (D4).
2. Measure the resistance from terminal P to the
transmission case.
Is the resistance less than the specified value?
200 Ω Go to Step 11 Go to Step 16
11 1. Place the gear selector in Manual Second (D2).
2. Measure the resistance from terminal P to the
transmission case.
Is the resistance greater than the specified value?
50 k Ω Go to Step 12 Go to Step 16
12 1. Turn the ignition OFF.
IMPORTANT: The resistance of the TFT Sensor is
temperature dependent, and therefore varies far
more than any other device.
2. Measure the resistance from terminal L to terminal M
(TFT Sensor) of the Jumper Harness.
Is the resistance within the specified range?
3088-3942 Ω
@ 20° C
159-198 Ω
@ 100° C
Go to Step 13 Go to Step 14
13. 1. Measure the resistance from terminal L to the
transmission case.
2. Measure the resistance from terminal M to the
transmission case.
Are both resistance’s greater than the specified value?
10 M Ω No problem
found. Exit the
table.
Go to Step 14
STEP ACTION VALUE YES NO
14 1. Disconnect the TFP Value Position Switch from the
A/T.
2. Wiring Harness Assembly.
IMPORTANT: The resistance of the TFT Sensor is
temperature dependent, and therefore varies far
more than any other device. Refer to Transmission
Fluid Temperature Sensor in Section 6C1-1 General
Information of the VX Series Service Information.
3. Using the J 39200 DVM, measure the resistance
between terminal A and terminal B of the TFP Value
Position Switch (TFT Sensor).
Is the resistance within the specified range?
3088–3942Ω
@ 20° C
159-198 Ω
@ 100° C
Go to Step 15 Go to Step 19
15 1. Measure the resistance from TFP Value Position
Switch terminal A to the transmission case.
2. Measure the resistance from TFP Value Position
Switch terminal B to the transmission case.
Are both resistance's greater than the specified value?
10 M Ω Go to Step 16 Go to Step 19
16 1. Inspect for high resistance or a short.
2. Inspect the A/T Wiring Harness Assembly for poor
electrical connections at the A/T pass-thru
connector, and at the TFP Value Position Switch
Look for the following problems:
• A bent terminal
• A backed out terminal
• A damaged terminal
• Poor terminal tension
3. If diagnosing for an intermittent problem, massage
the wiring harness while watching the test equipment
for a change.
Did you find and correct the high resistance or a short?
Verify the repair
Go to Step 1 Go to Step 17
17 1. Disconnect the TFP Value Position Switch from the
A/T W iring Harness Assembly.
2. Inspect the following circuits for an open or short:
• Circuit 1224
• Circuit 1225
• Circuit 1226
• Circuit 1227 (TFT Hi)
• Circuit 469 (TFT Lo)
Did you find a problem?
Go to Step 18 Go to Step 19
18 Replace the A/T Wiring Harness Assembly.
Refer to Automatic Transmission Wi ring Harness
Assembly Replacement, in Service Operations Section
7C-5 in VX Service Information.
Is the action complete?
Verify the repair
Go to Step 1
19 Replace the TFP Value Position Switch.
Refer to Automatic Transmission Fluid Pressure Manual
Valve Position Switch Replacement. Refer to Service
Operations in Section 6C1-3 of the VX Series Service
Information.
Is the action complete?
Verify the repair
Go to Step 1
TABLE 2.3 V6 PCM 1-2 S HIFT S OLENOID PERFORMANCE CHE CK
Circuit Description:
The 1-2 Shift Solenoid Valve (1-2 SS Valve) controls the fluid flow acting on the 1-2 and 3-4 shift valves.
The 1-2 SS Valve is a normally-open exhaust valve that is used with the 2-3 Shift Solenoid Valve (2-3 SS
Valve), in order to allow four different shifting combinations.
This functional check is useful for diagnosing unusual shift patterns that result from a mechanical fault of
the 1-2 shift solenoid or the shift valve. A 1-1-4-4 shift pattern indicates that the shift solenoid or the shift
valve is stuc k O N. The stuc k ON c ondition c ould be caus ed by the solenoid not exhausting f luid or the s hif t
valve rem aining in the applied position. Sim ilarly, a 2-2-3- 3 shift pattern indicates that the shift solenoid or
the shift valve is stuck O FF. The st uck OFF condition could be caused by the solenoid exhausting fluid or
the shift valve remaining in the non-applied position.
Diagnostic Aids:
• Verify that the transmission shift speeds are within specifications.
• Other internal transmission faults may cause more than one shift to occur.
• Refer to the following Table for the correct On and Off states of the shift solenoids.
Gear 1-2 Shift
Solenoid 2-3 Shift
Solenoid
1 ON ON
2 OFF ON
3 OFF OFF
4 ON OFF
Test Description:
The numbers below refer to the step numbers on the diagnostic Table.
2. This step tests that the scan tool commanded all shifts and all shift solenoid valves responded
correctly, but all the shifts did not occur. Refer to the table below.
3–2 Downshift
Control
Solenoid
1–2 Shift
Solenoid A
2–3 Shift
Solenoid B
YB 129 Transmission
Pass-Thru Connector
Torque
Converter
Clutch (TCC)
(PWM)
Solenoid
Torque
Converter
Clutch (TCC)
Enable
Solenoid
Pressure
Control
Solenoid
A
B
A
B
4284
A
B
A
B
EF32
EFI
Relay
P/ BLU (33 9)
G/W (897)
LG (1222)
Y/B (1223)
GY/R (422)
BR (418)
R (1228)
GY/BLU (1229)
A1 3–2 Cont r ol
Solenoid
1–2 Shift
Solenoid
2–3 Shift
Solenoid
TCC Enable
Solenoid
TCC PWM
Solenoid
Pressure Control
Solenoid High
Pressure Control
Solenoid Low
B1
A2
A12
A11
E9
E13
S
A
B
T
U
C
D
A
B
A
B
PCM
M
I
C
R
O
P
R
O
C
E
S
S
O
R
YE110
YB187
YB199
YB 187
P.C.M CO NNECTOR 2
A1 A12
B1 B12
G/W
(897)
(1223)
Y/B
B/R
(750)
BR/W
(792)
LG/B
(366)
GY/BLU
(1434)
G/Y
(428)
BR
(418)
GY/R
(422)
LG
(1222)
W
(423)
T/B
(424)
B/R
(750)
B
(630)
LBLU/B
(647)
O
(1426)
V
(430)
B/R
(453)
B/W
(1427)
BLU/W
(304)
W/G
(937))
TRANSMISSION CONNECTOR
GY/BLU
(1229)
R
(1228)
Y/B
(1223)
LG
(1222)
P/BLU
(339)
(1227)
B/Y
(1230)
B/W
GY/R
(422)
BR
(418)
BR/Y
(1224)
(1226)
GY
Y
(1225)
(897)
G/W
(V8)
B
(469) (V6)
OR
ENGINE CONNECTOR 1
YE110
O/W
(304)
(1426)
BLU/W
G/W
(339)
P/BLU
(465)
(123)
V/W
(1427)
B/W
Y
(1049)
TABLE 2.3 V6 PCM 1-2 SHIFT SOLENOID PERFORMANCE CHECK
STEP ACTION VALUE YES NO
1 Was the On-Board Diagnostic (OBD) System Check
performed? Go to Step 2 Go to OBD
System Check
2 1. Install the scan tool.
2. With the engine OFF, turn the ignition switch to the
RUN position.
3. While the engine is operating, raise the drive
wheels.
4. With the transmission in D4 range, use the scan tool
to command 1st, 2nd, 3rd and 4th gears while
accelerating the vehicle. Road testing the vehicle
may be necessary.
Did you detect a 1-1-4-4 or a 2-2-3-3 only shift pattern?
Go to Step 3 Go to “Diagnostic
Aids” on facing
page
3 Check the shift solenoid/hydraulic circuit for:
• An internal malfunction.
• Damaged seals on the shift solenoid valves.
Refer to the symptom diagnosis Tables.
Did you find and correct a problem?
Go to Step 4 Go to “Diagnostic
Aids”
on facing page
4 In order to verify your repair, perform the following
procedure:
1. Select DTC.
2. Select Clear Info.
3. Operate the vehicle under the following conditions
(only if traffic and road conditions permit):
• With the transmission in D4 range, use the scan
tool to command 1st, 2nd, 3rd and 4th gears
while accelerating the vehicle.
Did you detect a 1-1-4-4 or 2-2-3-3 only shift pattern?
Begin the
diagnosis again.
Go to Step 1
Repair Verified,
exit table
TABLE 2.4 V6 PCM 2-3 S HIFT S OLENOID PERFORMANCE CHE CK
Circuit Description:
The 2-3 Shift Solenoid Valve (2-3 SS Valve) controls the fluid flow acting on the 2-3 shift valves. The 2-3 SS
Valve is a normally-open exhaust valve that is used with the 1-2 Shift Solenoid Valve (1-2 SS Valve) in
order to allow four different shifting combinations.
This func tional check is usef ul for diagnosing unus ual shift patterns that result f rom a m echanic al failure of
the 2-3 shift solenoid or the shift valve. A 1-2-2-1 shift pattern indicates that the shift solenoid or the shift
valve is stuc k O N. The stuc k ON c ondition c ould be caus ed by the solenoid not exhausting f luid or the s hif t
valve rem aining in the applied position. Sim ilarly, a 4-3-3- 4 shift pattern indicates that the shift solenoid or
the shift valve is stuck O FF. The st uck OFF condition could be caused by the solenoid exhausting fluid or
the shift valve remaining in the non-applied position.
Diagnostic Aids:
Verify that the transmission shift speeds are within specifications.
Other internal transmission faults may cause more than one shift to occur.
• Refer to the following Table for the correct On and Off states of the shift solenoids.
Gear 1-2 Shift
Solenoid 2-3 Shift
Solenoid
1 ON ON
2 OFF ON
3 OFF OFF
4 ON OFF
Test Description:
The numbers below refer to the step numbers on the diagnostic Table.
2. This verifies that the scan tool commanded all the shifts, and all the shift solenoids responded correctly,
but all the shifts did not occur. Refer to the table below.
3–2 Downshift
Control
Solenoid
1–2 Shift
Solenoid A
2–3 Shift
Solenoid B
YB 129 Transmission
Pass-Thru Connector
Torque
Converter
Clutch (TCC)
(PWM)
Solenoid
Torque
Converter
Clutch (TCC)
Enable
Solenoid
Pressure
Control
Solenoid
A
B
A
B
4284
A
B
A
B
EF32
EFI
Relay
P/ BLU (33 9)
G/W (897)
LG (1222)
Y/B (1223)
GY/R (422)
BR (418)
R (1228)
GY/BLU (1229)
A1 3–2 Cont r ol
Solenoid
1–2 Shift
Solenoid
2–3 Shift
Solenoid
TCC Enable
Solenoid
TCC PWM
Solenoid
Pressure Control
Solenoid High
Pressure Control
Solenoid Low
B1
A2
A12
A11
E9
E13
S
A
B
T
U
C
D
A
B
A
B
PCM
M
I
C
R
O
P
R
O
C
E
S
S
O
R
YE110
YB187
YB199
YB187
P.C.M CONNECTOR 2
A1 A12
B1 B12
G/W
(897)
(1223)
Y/B
B/R
(750)
BR/W
(792)
LG/B
(366)
GY/BLU
(1434)
G/Y
(428)
BR
(418)
GY/R
(422)
LG
(1222)
W
(423)
T/B
(424)
B/R
(750)
B
(630)
LBLU/B
(647)
O
(1426)
V
(430)
B/R
(453)
B/W
(1427)
BLU/W
(304)
W/G
(937))
TRANSMISSION CONNECTOR
GY/BLU
(1229)
R
(1228)
Y/B
(1223)
LG
(1222)
P/BLU
(339)
(1227)
B/Y
(1230)
B/W
GY/R
(422)
BR
(418)
BR/Y
(1224)
(1226)
GY
Y
(1225)
(897)
G/W
(V8)
B
(469) (V6)
OR
ENGINE CONNECTOR 1
YE110
O/W
(304)
(1426)
BLU/W
G/W
(339)
P/BLU
(465)
(123)
V/W
(1427)
B/W
Y
(1049)
TABLE 2.4 V6 PCM 2-3 SHIFT SOLENOID PERFORMANCE CHECK
STEP ACTION VALUE YES NO
1 Was the On-Board Diagnostic (OBD) System Check
performed? Go to Step 2 Go to OBD
System Check
2 1. Install the scan tool.
2. With the engine OFF, turn the ignition switch to the
RUN position.
3. While the engine is operating, raise the drive wheels.
4. With the transmission in D4 range, use the scan tool
to command 1st, 2nd, 3rd, and 4th gears while
accelerating the vehicle. Road testing the vehicle
may be necessary.
Did you detect a 1-2-2-1 or 4-3-3-4 only shift pattern?
Go to Step 3 Go to “Diagnostic
Aids” on facing
page
3 Check the shift solenoid/hydraulic circuit for:
• An internal malfunction
• Damaged seals
Refer to the symptom diagnosis Tables in Section 6C1-
2B of the VX Series Service Information.
Did you find and correct a problem?
Go to Step 4 Go to “Diagnostic
Aids” on facing
page
4 In order to verify your repair, perform the following
procedure:
1. Select DTC.
2. Select Clear Info.
3. Operate the vehicle under the following conditions
(only if traffic and road conditions permit):
• With the transmission in D4 range, use the scan
tool to command 1st, 2nd, 3rd and 4th gears
while accelerating the vehicle.
Did you detect a 1-2-2-1 or a 4-3-3-4 only shift pattern?
Begin the
diagnosis again
Go to Step 1
Repair Verified,
exit table
TABLE 2.5 V6 PCM TRANSMISSION POWER/ECONOMY SWITCH
CIRCUIT DESCRIPTION:
The driver can select three transmission shift modes, ECONOMY or POWER or CRUISE using a dash or centre
console mounted switch for Economy/Power, and a cruise switch located on the steering column. The
Economy/Power switch is wired to the PCM and allows the driver to choose the Economy mode, for the best fuel
econom y in all driving conditions through the incr eased use of T CC. Power m ode provides later upshif ts and higher
line pressure in the transmission.
The PCM s ends out a buf f er ed voltage s ignal, about 12 volts, and monitors the s tatus of this cir cuit. O nc e the driver
selects Power, the switch momentarily pulls low the buffered 12 volts, and the PCM will interpret this as a Power
selection and adjust the transmission shift pattern accordingly, and instructs the instrument panel to turn ON the
Power lamp. If while driving, the driver selects the Economy position, again the buffered 12 volts is momentarily
pulled low, and the PCM will adj ust the transm ission shift pattern and ins truct the instrum ent panel to turn OFF the
Power lamp.
When the key is turned ON, the PCM shift mode is set to the last mode that was previously selected
(Economy/Power). The cruise control is set to OFF at every key ON cycle.
In cruise mode operation, when the driver activates the cruise control, the Power lamp and power mode will turn
OFF (if vehicle was in power mode) and the transmission shift pattern will switch to cruise shift pattern. When in
cruise mode the PCM will modify the transmission calibration so that earlier downshift and later upshift points are
provided.
For replacement of the Economy/Power switch, refer to Section 7C4 Automatic Transmission - On Vehicle
Servicing in VX Service Information.
TEST DESCRIPTION:
The numbers below refer to step numbers on the diagnostic Table.
2. This step tests for proper operation of the transmission POWER switch, the wiring and the PCM.
3. This step tests for proper POWER lamp illumination.
5. This step determines if the switch is faulty.
8. Some interior parts must be removed to disconnect and replace the transmission switch, Refer to
Section 1A2, "BODY DIMENSIONS" in VX Service Information.
P.C.M CONNECTOR 3
YB1 99
E1
F1
G
(842)
BLU
(841)
GY
(845)
Y
(846)
B/R
(750)
R
(1228)
G/W
(465)
V
(435)
GY/BLU
(1229)
(843)
V
(844)
BR/Y
(771)
BLU/W
(766)
W
(750)
B/R
Y
(772)
GY
(773)
BR/Y
(1224)
Y
(1225)
GY
(1226)
BLU
(774)
BLU/R
(31)
E16
F16
P
(39))
B/BLU
(1062)
(936)
BLU/O
M
I
C
R
O
VXPCM006A1
INSTRUMENT
M
I
C
R
O
PCM
12
SERIAL
DATA
5V
12V IGN
G/W (1 220) R/B (1221)
POWER
POWER/ECONOMY
SWITCH
12V
F14
C13 SERIAL
DATA
5V
BLU (774)
BCM
E2
D2 E9
D3
YB34YB30
YB66
YE114
LOC. E3
B/G
YB34
YB30
YE112 YB199
YB198
YB164
YB175
YB164
YB175
YB30
(774)
(8)
BLU
GY
(1429)
BR/W
(151)
B/G
(19)
R/W
BLU
(774)
B/G
(151)
(19)
(8)
BR/W
GY
ENGINE CONNECTOR 3
YE112
(1221)
(42)
(121)
BR/BLU
BR/R
R/BO/B
LG
P/B
BLU
(740)
(24)
(39)
(774)
LBLU
(411)
S/C ONLY
LOCATION E3 EARTH CONNECTOR
RIGHT HAND INNER FENDER
YE114
(151)
B/G
(157)
B/R
(150) (155)
BB/Y
(152)
B/W
(157)
B/R
TABLE 2.5 TRANSMISSION POWER/ECONOMY SWITCH
STEP ACTION VALUE YES NO
1 Was the On-Board Diagnostic (OBD) System Check
performed? Go to Step 2 Go to OBD
System Check
2 1. With the engine OFF, turn the ignition switch to the
RUN position.
2. Install the scan tool.
3. Depress the Transmission POWER switch and
observe the scan tool display.
Does the scan tool display change between the Power
or Economy mode?
Go to Step 3 Go to Step 5
3 Is the POWER lamp ON, when the scan tool displays
POWER? Go to Step 4 Go to
Instruments in
Section 12C in
VX Service
Information.
4 Does the POWER lamp go off, when the scan tool
displays ECONOMY? No Problem
found with switch
operation.
Go to
Instruments in
Section 12C in
VX Service
Information.
5 1. Disconnect the POWER switch from the wiring
harness connector.
2. Using a fused jumper wire, connect the two terminals
of the POWER switch wiring harness connector
together.
Does the scan tool display change between the Power
or Economy mode?
Go to Step 7 Go to Step 6
6 Using a fused jumper wire, connect circuit 774 to earth.
Does the scan tool display change between the Power
or Economy mode?
Go to Step 10 Go to Step 9
7 Check the POWER switch connector for a poor terminal
connection.
Was a problem found?
Verify the Repair Go to Step 8
8 Replace the faulty POW ER/ECONOMY switch.
Is the action complete? Verify the Repair
9 Check for an open or short to Earth in circuit 774, or a
faulty PCM connection for circuit 774.
Was a problem found?
Verify the Repair Go to Step 11
10 Repair open in Earth circuit 151at Power/Economy
switch.
Is action complete?
Verify the Repair
11 Replace PCM.
Refer to Section 6C1-3 Service Operations of the VX
Series Service Information, for PCM Programming and
Security Link procedure.
Is action complete?
Verify the Repair
TABLE 2.6 V6 PCM INSTRUMENT P ANEL GEAR INDICATOR CHECK
Circuit Description:
The transmission PRNDL module is a mulit-signal switch which sends a signal to the PCM to indicate gear
selection. The PCM will then determine the signal from the PRNDL module and send a command vie serial data
com m unication to the instr um ent panel cluster to turn "O N" the proper gear indicator lam p for the gear that is being
selected.
The PRNDL module uses four (4) discrete circuits to pull four (4) PCM voltages low in various combinations to
indicate each gear range. The voltage level of the circuits is represented as LOW = earthed, and HIGH = open
circuit. The four (4) states display ed represents decoder P, A, B, and C inputs.
The s can tool will display all four circuits ( P, A, B, C ) and the appr opriate HIGH's and LOW's to represent the gear
selected. If the gear selected does not match the HIGH LOW Table as displayed below on the scan tool, or the
instrument panel cluster gear lamp does not light up for the gear selected, there is a fault in the PRNDL select
circuit or in the instrument panel (IP) cluster.
Diagnostic Aids:
• Monitor a scan tool while moving related connectors and wiring harness. If a f ailure is indicated, the scan data
will change states f rom either Low to High, or from High to LOW. Moving the gear selector slowly through each
gear while monitoring the scan tool may also help isolate the problem.
• Any circuitry that is suspected as causing the interm ittent complaint, should be thoroughly checked for backed
out term inals, im proper m ating, brok en lock s, impr operly for med or dam aged terminals , poor terminal to wiring
connection or physical damage to the wiring harness.
• When a fault has occurred, the PCM defaults to the 3rd gear until a correct combination is received by the
PCM. Therefore, some selected gear positions may not be possible until the fault is repaired.
PCM
To
DLC
To
DLC To
ABS/ETC
Module
To ECC
Module
C13
5V
Serial
Data
Main
BCM G/W (1220)
R/B (1221)
YB198
YB66
YE114
YB199
YB66YB66
12
6
19
C
A
D
B
P/ BLU (44 ) B/Y (155)
W (776) Range
Signal P
12V
4293
12V
12V
12V
Range
Signal B
Range
Signal C
Range
Signal A
BLU/W (771)
Y (772)
GY (773)
F6
F8
F9
F3
PRNDL
Switch
Swi tch P
Swi tch A
Swi tch B
Swi tch C
SDISDI
Gear Indicator Lamps (Option)
Instrument Panel Cluster
SDI
To
Fuse
F13
Power/
Economy
LAmp
Check
Powertrain
Lamp (Mil)
Oil
Warning
Lamp
RNPD321
M
I
C
R
O
TRANSMISSION RANGE / PRNDL SWITCH VALID INPUT COMBINATIONS
GEAR POSITION
SELECTED
SCAN TOOL PRNDL DISPLAY
(P, A, B, C)
P A B C
PARK (P) LOW
(0) LOW
(0) HIGH
(12) HIGH
(12)
REVERSE (R) HIGH
(12) LOW
(0) LOW
(0) HIGH
(12)
NEUTRAL (N) LOW
(0) HIGH
(12) LOW
(0) HIGH
(12)
DRIVE 4 (D) HIGH
(12) HIGH
(12) LOW
(0) LOW
(0)
DRIVE (3) LOW
(0) LOW
(0) LOW
(0) LOW
(0)
DRIVE 2 (2) HIGH
(12) LOW
(0) HIGH
(12) LOW
(0)
DRIVE 1 (1) LOW
(0) HIGH
(12) HIGH
(12) LOW
(0)
Test Description:
The numbers below refer to the step numbers on the diagnostic Table.
4. Any circuitry that is suspected as causing the intermittent complaint, should be thoroughly checked for back ed
out term inals, im proper m ating, brok en locks , improperly form ed or damaged ter minals, poor ter minal to wiring
connection or physical damage to the wiring harness.
5. An invalid cir cuit will caus e the PRNDL display to go out. Jumper ing each circuit to ear th simulates the PRNDL
module s witch operation and checks the circuitry and PCM. W hile the PRNDL m odule is disconnec ted and the
circuits are not jum per ed to earth, the sc an tool should indicate a HIGH value. A value that is indicated as LOW
with no jumper to earth indicates a earthed circuit or faulty PCM.
P.C.M CO NNE CTOR 1
YB 198
C1
C16
D1
D16
V/W
(123)
LG/B
(444)
(442)
LBLU/B
LBLU
(441)
(443)
LG/W
(452)
B/Y
(417)
BLU LG
(1456)
GY
(1412)
BLU
(815)
LBLU
(826)
O
(740)
R/B
(1221)
R
(481)
GY
(416)
(413)
BLU/B
V
(412)
GY/B
(1413)
B
(469)
(472)
BR
W/B
(451)
(259)
G/B
Y
(410)
O
(740)
(1227)
B/Y
P
(39)
(A) = AUTO
(MAN) = MANUAL
BLU
BLU/W
T
(MAN) (832)
(832)
(831)
(MAN)
(A)
BR
(831)
(A)
V/W
(415)
P.C.M CO NNECTOR 3
YB1 99
E1
F1
G
(842)
BLU
(841)
GY
(845)
Y
(846)
B/R
(750)
R
(1228)
G/W
(465)
V
(435)
GY/BLU
(1229)
(843)
V
(844)
BR/Y
(771)
BLU/W
(766)
W
(750)
B/R
Y
(772)
GY
(773)
BR/Y
(1224)
Y
(1225)
GY
(1226)
BLU
(774)
BLU/R
(31)
E16
F16
P
(39))
B/BLU
(1062)
(936)
BLU/O
PRNDL SWITCH
(772)
(776)
Y
W
(773)
(771)
BLU/W
GY
YB 66
INSTRUMENTS
T
BLU/B
BR/W
(234)
(25)
(14)
(10)
(875)
(155)
(1340)
G/W
(44)
(121)
(8)
(30)
BLU/Y
G
O/Y
P/BLU
BR/R
V/W
(33)
(946)
(1220)
(88)
(15)
(123)
(85)
(19)
GY
W
V/R
BR
BR/O
Y/R
B/Y
LBLU
BLU
ENGINE CONNECTOR 1
YE110
O/W
(304)
(1426)
BLU/W
G/W
(339)
P/BLU
(465)
(123)
V/W
(1427)
B/W
Y
(1049)
TABLE 2.6 V6 PCM INSTRUMENT PANEL GEAR INDICATOR CHECK
STEP ACTION VALUE YES NO
1. Was the "On-Board Diagnostic" (OBD) System Check
performed? Go to Step 2. Go to OBD
System Check.
2. 1. Ignition "ON", engine "OFF".
2. Install a scan tool.
3. Move the gear selector through all it's ranges.
Does the scan tool indicate an INVALID in any of the
Ranges?
Go to Step 3 Go to Step 10
3. Compare the scan tool values with the Transmission
Range Switch Valid Input Combinations table.
Are all the circuit indicated as HIGH?
Go to Step 4 Go to Step 5
4. Check the transmission PRNDL module switch earth
Circuit for an open or poor connection and repair if
Necessary.
Was a problem found?
Verify Repair Go to Step 5
5. 1. Moving the gear selector through all it's ranges and
note which circuit did not correspond with the
Transmission Range Switch Valid Input
Combination table.
2. Disconnect the PRNDL module electrical
connector.
3. Jumper the circuit with the incorrect value to earth.
Does the jumpered circuit go from a HIGH value to a
LOW value?
Go to Step 8 Go to Step 6
6. Check the affected circuit for an open or short to earth
and repair as necessary.
Was a problem found?
Verify Repair Go to Step 7
7. Check for a poor connection at the PCM connector and
Repair as necessary.
Was a problem found?
Verify Repair Go to Step 9
8. Replace the PRNDL module.
Is action complete? Verify Repair
9. Replace PCM.
Refer to Section 6C1-3 Service Operations of the VX
Series Service Information, for PCM Programming and
Security Link procedure.
Is action complete?
Verify Repair
10. Does the scan tool indicate the same gear as the IP
Cluster? System OK,
refer to Diagnostic
Aids
Go to step 11
11. Remove IP cluster and inspect indicator lamp for being
Burnt.
Was a problem found?
Verify Repair Go to Step 12
12. Replace IP cluster.
Is action complete? Verify Repair
GEN3 0101
FUEL INJECTOR
TESTER
LOW VEHICLE BATTERY
READY TO TEST
TEST IN PROGRESS
AMPERAGE SUPPLY SELECTOR SWITCH
PUSH TO START TEST
Coil Test
4 amp
2.5 amp
0.5 amp
Balance Test
4 amp
0.5-2.5
amp
1
2
TABLE 2.7 V6 PCM FUEL INJECTOR BALANCE TEST
1. First Reading
2. Second Reading
Test Description
Caution: Wrap a shop towel around the fuel pressure connection in order to reduce the risk of fire and
personal injury. The towel will absorb any fuel leakage that occurs during the connection of the fuel
pressure gauge. Place the towel in an approved container when the connection of the fuel pressure gauge
is complete.
4. The engine coolant temperature must be below the operating temperature in order to avoid irregular fuel
pressure readings due to Hot Soak fuel boiling.
5. The fuel pressure should be within the specified range. If the fuel pressure is not within the specified range, go
to Fuel System Diagnosis in Section 6C1-2A in the VX Series Service Information.
The fuel pressure should reach a steady value. If the fuel pressure does not reach a steady value, go to
Fuel System Diagnosis.
7. If the pressure drop value for each fuel injector is within 10 kPa (1.5 psi) of the average pressure drop value, the
fuel injectors are flowing properly. Calculate the pressure drop value for each fuel injector by subtracting the
second pressure reading from the first pressure reading. Refer to the illustration above.
Running the engine after each injector test will prevent the engine from flooding.
TABLE 2.7 V6 PCM FUEL INJECTOR BALANCE TEST
Step Action Value(s) Yes No
1 Did you perform the Powertrain On-Board Diagnostic
(OBD) System Check? Go to Step 2 Go to Powertrain
OBD System
Check Table in
Section 6C1-2A
2 Did you perform the Fuel Injector Coil Test Procedure? Go to Step 3 Go to Fuel Inj.
Coil Test - EC T
Between
10-35°C of the
VX Series
Service
Information
3 Is the engine coolant temperature above the specified
value? 94°C (201°F) Go to Step 4 Go to Step 5
Step Action Value(s) Yes No
4 Allow the engine to cool below the specified value.
Is the engine coolant temperature below the specified
value?
94°C (201°F) Go to Step 5
5 Caution: Wrap a shop towel around the fuel pressure
connection in order to reduce the risk of fire and
personal injury. The towel will absorb any fuel
leakage that occurs during the connection of the fuel
pressure gauge. Place the towel in an approved
container when the connection of the fuel pressure
gauge is complete.
1. Releave fuel pressure. Refer to Section 6C1-3 of the
VX Series Service Information.
2. Connect the fuel pressure gauge hose SD28057 and
SD28018 fuel pressure gauge to the fuel pressure
line.
3. Energise the fuel pump using the scan tool.
4. Place the bleed hose of the fuel pressure gauge into
an approved petrol container.
5. Bleed the air out of the fuel pressure gauge.
6. Observe the reading on the fuel pressure gauge.
Is the fuel pressure within the specified limits?
270-350 kPa
(55-62 psi) Go to Step 6 Go to
Fuel System
Diagnosis in
Section 6C1-2A
6 Turn the fuel pump OFF.
Does the fuel pump remain constant? Go to Step 7 Go to
Fuel System
Diagnosis in
Section 6C1-2A
7 1. Connect the J 39021 fuel injector tester to a fuel
injector.
2. Set the amperage supply selector switch on the fuel
injector tester to the Balance Test 0.5-2.5 amp
position.
3. Turn the fuel pump ON then OFF in order to
pressurise the fuel system.
4. Record the fuel pressure indicated by the fuel
pressure gauge after the fuel pressure stabilises. This
is the 1st pressure reading (refer to (1) in the
illustration).
5. Energise the fuel injector by depressing the Push to
Start Test button on the fuel injector tester.
6. Record the fuel pressure indicated by the fuel
pressure gauge after the fuel pressure gauge needle
has stopped moving. This is the 2nd pressure reading
(refer to (2) in the illustration).
7. Subtract the 2nd pressure reading from the 1st
pressure reading for one fuel injector. The result is the
pressure drop value.
8. Run the engine after each test to clear the residual
fuel from the cylinder.
Was test completed?
Go to Step 8
8 1. Repeat Steps 1 through 7 for each fuel injector.
2. Obtain a pressure drop value for each fuel injector.
3. Add all of the individual pressure drop values. This is
the total pressure drop.
4. Divide the total pressure drop by the number of fuel
injectors. This is the average pressure drop.
Does any fuel injector have a pressure drop value that is
either higher than the average pressure drop or lower
than the average pressure drop by the specified value?
10 kPa
(1.5 psi) Go to Step 9 Go to Symptoms
9 NOTE: Do not repeat any portion of this test before
running the engine in order to prevent the engine from
flooding.
Re-test any fuel injector that does not meet the
specification. Refer to procedure in Step 7.
Does any fuel injector still have a pressure drop value
that is either higher than the average pressure drop or
lower than the average pressure drop by the specified
value?
10 kPa
(1.5 psi) Go to Step 10 Go to Symptoms
10 Replace the faulty fuel injector(s). Refer to Fuel Injector
Replacement in Section 6C1-3.
Is the replacement complete?
System OK
GEN3 0102
FUEL INJECTO R
TESTER
AMPERAG E SUPPLY SELECTOR SWITCH
PUS H TO START TEST
LOW VEHICLE BATTER Y
READY TO TEST
TES T IN PROGR E SS
J 39021
B+
J 39 2 00 DM M
V-DC mA
V-AC A
OFF µ A
mV
Coil Test
4 amp
2.5 amp
0.5 amp
Balance Test
4 amp
0.5-2.5
amp
TABLE 2.8 V6 PCM FUEL INJECTOR COIL TEST - ECT BETWEEN 10 - 35°C
Test Description
Caution: Wrap a shop towel around the fuel pressure connection in order to reduce the risk of fire and
personal injury. The towel will absorb any fuel leakage that occurs during the connection of the fuel
pressure gauge. Place the towel in an approved container w hen the connection of the fuel pressure gauge
is complete.
2. T he engine coolant tem perature affec ts the ability of the f uel injector tester to detect a faulty fuel injector. If the
engine coolant temperature is NOT between 10°C and 35°C (50°F and 95°F), go to Fuel Inj. Coil Test - ECT
Outside 10-35°C.
3. The first second of the voltage displayed by the DMM may be inaccurate due to the initial current surge.
Therefore, record the lowest voltage displayed by the DMM after the first second of the test. The voltage
displayed by the DMM should be within the specif ied range ( refe r to the exam ple). T he voltage dis played by the
DMM m ay increase throughout the test as a fuel injector windings warm and the resistance of the fuel injector
windings changes. An erratic voltage reading (large fluctuations in voltage that do not stabilise) indicates an
intermittent connection within the fuel injector.
Examples
Resistance
Ohms Voltage Specification at
10°C-35°C (50°F-95°F)
11.4- 12.6 5.7 - 6.6 V
Fuel Injector
Number Voltage
Reading
Pass/Fail
1 6.3 P
2 5.9 P
3 6.2 P
4 6.1 P
5 4.8 F
6 6.0 P
TABLE 2.8 V6 PCM FUEL INJECTOR COIL TEST - ECT BETWEEN 10 - 35°C
Step Action Value(s) Yes No
1 Did you perform the Powertrain On-Board Diagnostic
(OBD) System Check? Go to Step 2 Go to Powertrain
OBD System
Check Table in
Section 6C3-2A
2 1. Connect the Tech 2 scan tool.
2. Check the engine coolant temperature.
Is the engine coolant temperature within the specified
value?
10°C - 35°C
(50°F - 95°F) Go to Step 3 Go to Fuel Inj.
Coil Test - EC T
Outside 10-35°C
of the VX Series
Service
Information
3 1. Turn the ignition ON
Note: In order to prevent flooding of a single cylinder and
possible engine damage, relieve the fuel pressure before
performing the fuel injector coil test procedure.
2. Relieve the fuel pressure. Refer to the Fuel Pressure
Relief Procedure.
3. Access the fuel injector electrical connectors as
required.
4. Connect the J 39201 fuel injector tester to B+ and
earth.
5. Set the amperage supply selector switch on the fuel
injector tester to the Coil Test 0.5 amp position.
6. Connect the leads from the J 39200 Digital Multi-
Meter (DMM J 39200) to the fuel injector tester. Refer
to the illustration associated with the test description.
7. Set the DMM to the tenths scale (0.0).
8. Connect the fuel injector tester to a fuel injector.
IMPORTANT: Check the engine coolant temperature
again in order to ensure that the correct Table is being
used.
9. Press the Push to Start Test button on the fuel
injector tester.
10. Observe the voltage reading on the DMM.
IMPORTANT: The voltage reading may rise during the
test.
11. Record the lowest voltage observed after the first
second of the test.
12. Repeat Steps 8 through 11 for each fuel injector.
Did any fuel injector have an erratic voltage reading
(large fluctuations in voltage that do not stabilise) or
voltage readings outside of the specified value?
5.7-6.6 V Go to Step 4 Go to Fuel
Injector Balance
Test of the VX
Series Service
Information
4 Replace the faulty fuel injector(s). Refer to Fuel Injector
Replacement in Section 6C1-3 of the VX Series Service
Information.
Is the replacement complete?
Go to Fuel
Injector Balance
Test of the VX
Series Service
Information
GEN3 0102
FUEL INJECTO R
TESTER
AMPERAGE SUPPLY SEL ECT OR SWITCH
PUS H TO START TEST
LOW VEHICLE BATTER Y
READY TO TEST
TES T IN PROGR E SS
J 39021
B+
J 39 2 00 DM M
V-DC mA
V-AC A
OFF µ A
mV
Coil Test
4 amp
2.5 amp
0.5 amp
Balance Test
4 amp
0.5-2.5
amp
TABLE 2.9 V6 PCM FUEL INJECTOR COIL TEST - ECT OUTSIDE 10 - 35°C
Test Description
Caution: Wrap a shop towel around the fuel pressure connection in order to reduce the risk of fire and
personal injury. The towel will absorb any fuel leakage that occurs during the connection of the fuel
pressure gauge. Place the towel in an approved container w hen the connection of the fuel pressure gauge
is complete.
2. T he engine coolant temperatur e affects the ability of the fuel inj ector tester to detect a faulty fuel injector. If the
engine coolant temperature is NOT outside 10°C and 35°C (50°F and 95°F), go to Fuel Inj Coil Test - ECT
Between 10-35°C of the VX Series Service Information.
3. The first second of the voltage displayed by the DMM may be inaccurate due to the initial current surge.
Therefore, record the lowest voltage displayed by the DMM after the first second of the test. The voltage
displayed by the DMM may increase throughout the test as the f uel injector windings warm and the resistance
of the fuel injector windings changes. An erratic voltage reading (large fluctuations in voltage that do not
stabilise) indicates an intermittent connection within the fuel injector.
From the voltages rec orded, identify the highest voltage, excluding any voltages above 9.5 volts. Subtract each
voltage that is not above 9.5 volts from the highest voltage. Record each subtracted value (refer to the
Exam ple) . T he s ubtr act ed value f or any fuel injec tor with a subtr acted value that is greater than 0.6 volt is faulty.
Replace the fuel injector. A fuel injector with a recorded voltage above 9.5 volts is also faulty. Replace the fuel
injector.
Examples
Highest Voltage
Reading Acceptable Subtracted Value
Above/Below
10°C-35°C (50°F-95°F)
7.1 V 0.6 V
Injector
Number
Voltage Subtracted
Value
Pass/Fail
1 9.8 -- F
2 6.6 0.5 P
3 6.9 0.2 P
4 5.8 1.3 F
5 7.0 0.1 P
6 7.1 0.0 P
TABLE 2.9 V6 PCM FUEL INJECTOR COIL TEST - ECT OUTSIDE 10 - 35°C
Step Action Value(s) Yes No
1 Did you perform the Powertrain On-Board Diagnostic
(OBD) System Check? Go to Step 2 Go to Powertrain
OBD System
Check Table in
Section 6C3-2A
2 1. Connect the Tech 2 scan tool.
2. Check the engine coolant temperature.
Is the engine coolant temperature outside the specified
value?
10°C - 35°C
(50°F - 95°F) Go to Step 3 Go to Fuel Inj
Coil Test - EC T
Between
10-35°C of the
VX Series
Service
Information
3 1. Turn the ignition off.
Note: In order to prevent flooding of a single cylinder and
possible engine damage, relieve the fuel pressure before
performing the fuel injector coil test procedure.
2. Relieve the fuel pressure. Refer to the Fuel Pressure
Relief Procedure in Section 6C1-3 of the VX Series
Service Information.
3. Access the fuel injector electrical connectors as
required.
4. Connect the J 39201 fuel injector tester to B+ and
earth.
5. Set the amperage supply selector switch on the fuel
injector tester to the Coil Test 0.5 amp position.
6. Connect the leads from the J 39200 Digital Multi-
Meter (DMM J 39200) to the fuel injector tester. Refer
to the illustration associated with the test description.
7. Set the DMM to the tenths scale (0.0).
8. Connect the fuel injector tester to a fuel injector.
IMPORTANT: Check the engine coolant temperature
again in order to ensure that the correct Table is being
used.
9. Press the Push to Start Test button on the fuel
injector tester.
10. Observe the voltage reading on the DMM.
IMPORTANT: The voltage reading may rise during the
test.
11. Record the lowest voltage observed after the first
second of the test.
12. Repeat Steps 8 through 11 for each fuel injector.
13. Identify the highest voltage reading recorded from the
highest voltage reading recorded.
14. Subtract any other voltage reading recorded from the
highest voltage reading recorded.
15. Repeat Step 14 for all the remaining fuel injectors.
Is any value that resulted from subtracting greater than
the specified value?
0.6 V Go to Step 4 Go to Fuel
Injector Balance
Test of the VX
Series Service
Information
4 Replace any fuel injector that had any of the following:
• A subtracted value exceeding 0.6 volts.
• An initial reading above 9.5 volts.
• An erratic reading.
Refer to Fuel Injector Replacement in Section 6C1-3 of
the VX Series Service Information.
Is the replacement complete?
Go to Fuel
Injector Balance
Test of the VX
Series Service
Information
TABLE 3.0 V6 PCM FUEL INJECTOR CIRCUIT DIAGNOSIS
Circuit Description
The PCM will enable an injector on the intake stroke of each cylinder. Individual cylinder fuel control is referred to as
Sequential Multiport Fuel Injector (SFI).
Battery voltage is supplied directly to the fuel injectors. The PCM controls each injector by earthing the control circuit
via an internal switch called a driver. The primary function of the driver is to supply the earth for the component
being controlled.
Diagnostic Aids
• If an injector is disconnected while the engine is operating the injector driver will be disabled for the entire
ignition cycle.
• When the injector driver is disabled, an engine misfire will be apparent.
• For an intermittent condition, Refer to Section 6C1-2B Symptoms of the VX Series Service Information.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
4. This step checks to see if each injector electrically is functioning properly.
6. This step checks to see if there is a short to earth in the injector ignition feed circuits.
9. This step checks for an open or short the earth in the injector driver circuit.
P.C.M CO NNECTOR 3
YB1 99
E1
F1
G
(842)
BLU
(841)
GY
(845)
Y
(846)
B/R
(750)
R
(1228)
G/W
(465)
V
(435)
GY/BLU
(1229)
(843)
V
(844)
BR/Y
(771)
BLU/W
(766)
W
(750)
B/R
Y
(772)
GY
(773)
BR/Y
(1224)
Y
(1225)
GY
(1226)
BLU
(774)
BLU/R
(31)
E16
F16
P
(39))
B/BLU
(1062)
(936)
BLU/O
INJECTORS
GY
(1)
(842)
(481)
Y
V
BLU
(6)
(4)
(2)
(846)
(843)
G
R
(845)
(841)
(5)
(844)
BR/Y
(3)
YE111
ENGINE CONNECTOR 2
(482)
(481)
R
LG
GY
G
(434)
(129)
P
(439)
(59)
(366)
LG/B
GW/B
(451)
VXPCM017
# 2 # 4 # 6
# 1 # 3 # 5
PCM
C12
D12
E6
F2
E2
E4
F1
E5
C14
D16
BATTERY FEED
BATTERY FEED
O (740)
O (740)
BLU (841)
V (84 3 )
GY (845)
INJECTOR CONTROL
IN JECTOR VOLTAGE
MONITOR LINE
IGNITION FEED
O/Y (479)
EFI RELAY
B/W (152)
P (3)
O/B (740)
IGN SW
M
I
C
R
O
R (481)
P (39 )
P/B
(39)
Y (84 6 )
BR/Y (844)
G (842)
F31
F14
F34
+-
BATTERY
FS
FJ
R (2H)
(1040)
YE112
YB198
YB198YE112
YE39
YE114
YE39 YB199
YE22
YE22
TABLE 3.0 V6 PCM FUEL INJECTOR CIRCUIT DIAGNOSIS
Step Action Value(s) Yes No
1 Did you perform the Powertrain On-Board Diagnostic
(OBD) System Check? Go to Step 2 Go to Powertrain
OBD System
Check Table in
Section 6C3-2A
2 Is the injector fuse F34 OK? Go to Step 3 Go to Step 6
3 1. Turn OFF the ignition.
2. Disconnect all the injector harness connectors.
3. Turn ON the ignition leaving the engine OFF.
4. Using a test lamp J 34142-A connected to earth,
probe each injector harness ignition feed circuits.
Does the test lamp illuminate for all injectors?
Go to Step 4 Go to Step 8
4 1. Turn OFF the ignition.
2. Connect the injector test lamp (ST 8329) to isolate the
injector harness to each of the injectors one at a time.
3. Start the engine and idle.
Does the test lamp flash for all injectors?
Go to Step 5 Go to Step 9
5 1. Inspect the injector harness terminals for correct
terminal tension.
2. Replace terminal as necessary.
Was a repair necessary?
System OK Go to Step 13
6 1. Turn OFF the ignition.
2. Disconnect the injector harness connectors.
3. Using a test lamp J 34142-B connected to earth,
probe the injector harness ignition feed circuit at each
injector.
Does the test lamp illuminate?
Go to Step 11 Go to Step 7
7 Measure the resistance of each injector that is powered
by the fuse that is open using a DMM J 39200.
Does any injector measure less than the specified value?
11.4Ω Go to Step 13 Go to Step 12
8 Repair the injector ignition feed circuit that did not
illuminate the test light..
Is the action complete?
System OK
9 1. Turn OFF the ignition.
2. Disconnect the PCM Blue E/F connector.
3. Check the injector driver circuit that did not flash the
test light for an open or short to earth.
Is the injector driver circuit open or shorted to earth?
Go to Step 10 Go to Step 15
10 Repair injector driver circuit for an open or short to earth.
Is the action complete? System OK
11 Repair the earthed ignition feed circuit to the injectors.
Is the action complete? System OK
12 Repair short to earth in the injector ignition feed circuit.
Is the action complete? System OK
13 Replace the faulty injector(s) that was isolated. Refer to
Fuel Injector Replacement.
Is the action complete?
System OK
14 Replace PCM.
Refer to Section 6C1-3 Service Operations of the VX
Series Service Information, for PCM Programming and
Security Link procedure.
Is action complete?
System OK
15 Inspect the appropriate injector circuit for the following:
• Poor connections at the injector and the PCM
terminal
• Intermittent short to earth
• Intermittent opens
If a problem is found, repair the circuit as necessary.
Did you find and correct the condition?
System OK Intermittent
condition. Go to
Section 6C1-2B
Symptoms of the
VX Series
Service
Information