diagram INFINITI QX4 2001 Factory Owner's Manual

Diagnostic ProcedureNBAT0052
1 CHECK VALVE RESISTANCE
1. Turn ignition switch to ªOFFº position.
2. Disconnect terminal cord assembly connector on the right side of transfer assembly.
3. Check resistance between terminal 7 and ground.
SAT156J
Is resistance approx. 10 - 20W?
Ye s©GO TO 3.
No©GO TO 2.
2 CHECK VALVE OPERATION
1. Remove oil pan. Refer to AT-273.
2. Check the following items:
ITorque converter clutch solenoid valve
Refer to ªComponent Inspectionº, AT-152.
IHarness of terminal cord assembly for short or open
OK or NG
OK©GO TO 3.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
3 CHECK RESISTANCE
1. Turn ignition switch to ªOFFº position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal 7 and TCM harness connector terminal 3. Refer to wiring diagram Ð AT Ð TCV.
Continuity should exist.
If OK, check harness for short to ground and short to power.
4. Reinstall any part removed.
OK or NG
OK©GO TO 4.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
4 CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-149.
OK or NG
OK©INSPECTION END
NG©GO TO 5.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
Diagnostic Procedure
AT-151

Wiring Diagram Ð AT Ð TCCSIGNBAT0195
MAT913A
DTC P0744 IMPROPER LOCK-UP OPERATION
Wiring Diagram Ð AT Ð TCCSIG
AT-156

Wiring Diagram Ð AT Ð LPSVNBAT0196
MAT914A
DTC P0745 LINE PRESSURE SOLENOID VALVE
Wiring Diagram Ð AT Ð LPSV
AT-164

3 CHECK POWER SOURCE AND DROPPING RESISTOR CIRCUIT
1. Turn ignition switch to ªOFFº position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal 6 and TCM harness connector terminal 2.
SAT522J
Is resistance approx. 11.2 - 12.8W?
Ye s©GO TO 5.
No©GO TO 4.
4 DETECT MALFUNCTIONING ITEM
Check the following items:
IDropping resistor
Refer to ªComponent Inspectionº, AT-167.
IHarness for short or open between TCM terminal 2 and terminal cord assembly (Main harness)
OK or NG
OK©GO TO 5.
NG©Repair or replace damaged parts.
5 CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to ªOFFº position.
2. Check continuity between terminal 6 and TCM harness connector terminal 1. Refer to wiring diagram Ð AT Ð LPSV.
Continuity should exist.
If OK, check harness for short to ground or to power.
3. Reinstall any part removed.
Ye s©GO TO 6.
No©Repair or replace harness between TCM terminal 1 and terminal cord assembly.
6 CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-163.
OK or NG
OK©INSPECTION END
NG©GO TO 7.
DTC P0745 LINE PRESSURE SOLENOID VALVE
Diagnostic Procedure (Cont'd)
AT-166

Wiring Diagram Ð AT Ð SSV/ANBAT0197
MAT738A
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0750 SHIFT SOLENOID VALVE A
Wiring Diagram Ð AT Ð SSV/A
AT-169

Diagnostic ProcedureNBAT0061
1 CHECK VALVE RESISTANCE
1. Turn ignition switch to ªOFFº position.
2. Disconnect terminal cord assembly connector on the right side of transfer assembly.
3. Check resistance between terminal 3 and ground.
SAT164J
Is resistance approx. 20 - 40W?
Ye s©GO TO 3.
No©GO TO 2.
2 CHECK VALVE OPERATION
1. Remove control valve assembly.
Refer to AT-273.
2. Check the following items:
IShift solenoid valve A
Refer to ªComponent Inspectionº, AT-171.
IHarness of terminal cord assembly for short or open
OK or NG
OK©GO TO 3.
NG©Repair or replace damaged parts.
3 CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to ªOFFº position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal 3 and TCM harness connector terminal 11. Refer to wiring diagram Ð AT Ð
SSV/A.
Continuity should exist.
If OK, check harness for short to ground and short to power.
4. Reinstall any part removed.
OK or NG
OK©GO TO 4.
NG©Repair open circuit or short to ground or short to power in harness or connectors.
4 CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-168.
OK or NG
OK©INSPECTION END
NG©GO TO 5.
DTC P0750 SHIFT SOLENOID VALVE A
Diagnostic Procedure
AT-170

Wiring Diagram Ð AT Ð SSV/BNBAT0198
MAT739A
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0755 SHIFT SOLENOID VALVE B
Wiring Diagram Ð AT Ð SSV/B
AT-173

Diagnostic ProcedureNBAT0064
1 CHECK VALVE RESISTANCE
1. Turn ignition switch to ªOFFº position.
2. Disconnect terminal cord assembly connector on the right side of transfer assembly.
3. Check resistance between terminal 2 and ground.
SAT166J
Is resistance approx. 20 - 40W?
Ye s©GO TO 3.
No©GO TO 2.
2 CHECK VALVE OPERATION
1. Remove control valve assembly.
Refer to AT-273.
2. Check the following items:
IShift solenoid valve B
Refer to ªComponent Inspectionº, AT-175.
IHarness of terminal cord assembly for short or open
OK or NG
OK©GO TO 3.
NG©Repair or replace damaged parts.
3 CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to ªOFFº position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal 2 and TCM harness connector terminal 12. Refer to wiring diagram Ð AT Ð
SSV/B.
Continuity should exist.
If OK, check harness for short to ground and short to power.
4. Reinstall any part removed.
Is resistance approx. 0W?
Ye s©GO TO 4.
No©Repair open circuit or short to ground or short to power in harness or connectors.
4 CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-172.
OK or NG
OK©INSPECTION END
NG©GO TO 5.
DTC P0755 SHIFT SOLENOID VALVE B
Diagnostic Procedure
AT-174

Wiring Diagram Ð AT Ð TPSNBAT0199
MAT915A
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1705 THROTTLE POSITION SENSOR
Wiring Diagram Ð AT Ð TPS
AT-179

Wiring Diagram Ð AT Ð OVRCSVNBAT0200
MAT741A
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1760 OVERRUN CLUTCH SOLENOID VALVE
Wiring Diagram Ð AT Ð OVRCSV
AT-187