2001 INFINITI QX4 wiring diagram

Diagnostic ProcedureNBEC0270
1 CHECK A/T CONTROL INPUT SIGNAL CIRCUIT FOR OPEN
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector and TCM (Transmission Control Module) harness connector.
SEF955Y
SEF001Z
3. Check harness continuity between ECM terminal 114 and TCM terminal 33.
Refer to Wiring Diagram.
Continuity should exist.
OK or NG
OK©GO TO 3.
NG©GO TO 2.
2 DETECT MALFUNCTION PART
Check the following.
IHarness connectors M94, F27
IHarness for open or short between ECM and TCM (Transmission control module)
©Repair harness or connectors.
3 CHECK A/T CONTROL INPUT SIGNAL CIRCUIT FOR SHORT
1. Check harness continuity between ECM terminal 114 and ground.
Refer to Wiring Diagram.
Continuity should not exist.
2. Also check harness for short to power.
OK or NG
OK©GO TO 4.
NG©Repair short to ground or short to power in harness or connectos.
4 CHECK INTERMITTENT INCIDENT
Refer to ªTROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENTº, EC-140.
©INSPECTION END
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0600 A/T COMMUNICATION LINE
Diagnostic Procedure
EC-443

Wiring DiagramNBEC0703RIGHT BANKNBEC0703S01
MEC989C
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
D T C P 1111(RIGHT, -B1), P1136 (LEFT, -B2) INTAKE VALVE TIMING CONTROL
SOLENOID VALVE (CIRCUIT)
Wiring Diagram
EC-453

LEFT BANKNBEC0703S02
MEC988C
D T C P 1111(RIGHT, -B1), P1136 (LEFT, -B2) INTAKE VALVE TIMING CONTROL
SOLENOID VALVE (CIRCUIT)
Wiring Diagram (Cont'd)
EC-454

Wiring DiagramNBEC0529
MEC980C
DTC P1130 SWIRL CONTROL VALVE CONTROL SOLENOID VALVE
Wiring Diagram
EC-462

3 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect swirl control valve control solenoid valve harness connector.
SEF002Z
3. Turn ignition switch ªONº.
4. Check voltage between swirl control valve control solenoid valve terminal 1 and ground with CONSULT-II or tester.
SEF619X
OK or NG
OK©GO TO 5.
NG©GO TO 4.
4 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors M32, F23
I15A fuse
IHarness for open or short between swirl control valve control solenoid valve and fuse
©Repair harness or connectors.
5 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN
AND SHORT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 29 and swirl control valve control solenoid valve terminal 2. Refer to
Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 6.
NG©Repair open circuit, short to ground or short to power in harness connectors.
DTC P1130 SWIRL CONTROL VALVE CONTROL SOLENOID VALVE
Diagnostic Procedure (Cont'd)
EC-464

3 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch ªOFFº.
2. Disconnect swirl control valve control solenoid valve harness connector.
SEF002Z
3. Turn ignition switch ªONº.
4. Check voltage between swirl control valve control solenoid valve terminal 1 and ground with CONSULT-II or tester.
SEF619X
OK or NG
OK©GO TO 5.
NG©GO TO 4.
4 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors M32, F23
I15A fuse
IHarness for open or short between swirl control valve control solenoid valve and fuse
©Repair harness or connectors.
5 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN
AND SHORT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 29 and swirl control valve control solenoid valve terminal 2. Refer to
Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK©GO TO 6.
NG©Repair open circuit, short to ground or short to power in harness connectors.
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1130 SWIRL CONTROL VALVE CONTROL SOLENOID VALVE
Diagnostic Procedure (Cont'd)
EC-467

4 DETECT MALFUNCTIONING PART
Check the following.
IHarness connectors M32, F23
I15A fuse
IHarness for open or short between swirl control valve control solenoid valve and fuse
©Repair harness or connectors.
5 CHECK SWIRL CONTROL VALVE CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN
AND SHORT
1. Turn ignition switch ªOFFº.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 29 and terminal 2. Refer to Wiring Diagram.
Continuity should exist.
4. Also, check harness for short to ground and short to power.
OK or NG
OK©GO TO 6.
NG©Repair open circuit, short to ground or short to power in harness connectors.
6 CHECK HOSES
Check hoses and tubes between air cleaner and swirl control valve vacuum check switch for clogging or improper connec-
tion.
SEF109L
OK or NG
OK©GO TO 7.
NG©Repair hoses or tubes.
DTC P1130 SWIRL CONTROL VALVE CONTROL SOLENOID VALVE
Diagnostic Procedure (Cont'd)
EC-476

Wiring DiagramNBEC0711RIGHT BANKNBEC0711S01
MEC987C
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1140 (RIGHT, -B1), P1145 (LEFT, -B2) INTAKE VALVE TIMING CONTROL
POSITION SENSOR (CIRCUIT)
Wiring Diagram
EC-485