2009 INFINITI QX56 air condition

PWC-44
< COMPONENT DIAGNOSIS >
REAR POWER VENT WINDOW SWITCH CIRCUIT CHECK
REAR POWER VENT WINDOW SWITCH CIRCUIT CHECK
DescriptionINFOID:0000000005864657
Rear power vent window motor LH and RH will be operated if rear power vent window switch is operated.
Diagnosis Procedure - (Early Production)INFOID:0000000005864658
1. CHECK REAR POWER VENT WINDOW SWITCH OPERATION
1. Turn ignition switch OFF.
2. Disconnect rear power vent window switch.
3. Check continuity between rear power vent window switch termi- nals 1, 3 and 4.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace rear power vent window switch. Refer to PWC-120, "Removal and Installation"
.
2. CHECK REAR POWER VENT WINDOW SWITCH CIRCUIT HARNESS CONTINUITY
Check continuity between rear pow er vent window switch connector
M95 terminal 1 and ground.
Is the inspection result normal?
YES >> Rear power vent window switch circuit harness OK.
NO >> Repair or replace harness.
Diagnosis Procedure - (Late Production)INFOID:0000000005864659
1. CHECK REAR POWER VENT WINDOW SWITCH OPERATION
1. Turn ignition switch OFF.
2. Disconnect rear power vent window switch.
3. Check continuity between rear power vent window switch termi- nals 1, 3 and 4.
Is the inspection result normal?
YES >> GO TO 2
NO >> Replace rear power vent window switch. Refer to PWC-120, "Removal and Installation"
.
2. CHECK REAR POWER VENT WINDOW SWITCH CIRCUIT HARNESS CONTINUITY
Terminals Condition Continuity
31 Rear power vent window
switch is pressed OPEN. Ye s
41 Rear power vent window
switch is pressed CLOSE.
Ye s
LIIA0956E
1 - Ground : Continuity should exist.
ALKIA1035ZZ
Terminals Condition Continuity
41 Rear power vent window
switch is pressed OPEN. Ye s
31 Rear power vent window
switch is pressed CLOSE. Ye s
LIIA0956E
Revision: December 20092009 QX56

PWC-46
< COMPONENT DIAGNOSIS >
REAR POWER VENT WINDOW MOTOR LH CIRCUIT CHECK
REAR POWER VENT WINDOW MOTOR LH CIRCUIT CHECK
DescriptionINFOID:0000000005864660
Rear power vent windows OPEN/CLOSE by receiving t he signal from rear power vent window relays which
are controlled by the rear power vent window switch.
Diagnosis ProcedureINFOID:0000000005864661
1. CHECK REAR POWER VENT WINDOW LH SIGNAL
1. Turn ignition switch OFF.
2. Disconnect rear power vent window motor LH.
3. Turn ignition switch ON.
4. Check voltage between rear power vent window motor LH con- nector B52 terminals 1, 2 and ground.
Is the inspection result normal?
YES >> Replace rear power vent window motor LH. Refer to GW-22, "Removal and Installation".
NO >> Repair or replace harness.
Connector Terminals Rear power
vent window
switch condition Voltage (V)
(Approx.)
(+) (-)
B52 1
Ground Open 0
Close Battery voltage
2 Open Battery voltage
Close 0
ALKIA1037GB
Revision: December 20092009 QX56

REAR POWER VENT WINDOW MOTOR RH CIRCUIT CHECK
PWC-47
< COMPONENT DIAGNOSIS >
C
D E
F
G H
I
J
L
M A
B
PWC
N
O P
REAR POWER VENT WINDOW MOTOR RH CIRCUIT CHECK
DescriptionINFOID:0000000005864662
Rear power vent windows OPEN/CLOSE by receiving t he signal from rear power vent window relays which
are controlled by the rear power vent window switch.
Diagnosis ProcedureINFOID:0000000005864663
1.CHECK REAR POWER VENT WINDOW SWITCH RH SIGNAL
1. Turn ignition switch OFF.
2. Disconnect rear power vent window motor RH.
3. Turn ignition switch ON.
4. Check voltage between rear power vent window motor RH con- nector B150 terminals 1, 2 and ground.
Is the inspection result normal?
YES >> Replace rear power vent window motor RH. Refer to GW-22, "Removal and Installation".
NO >> Repair or replace harness.
Connector Terminals Rear power
vent window
switch condition Voltage (V)
(Approx.)
(+) (-)
B150 1
Ground Open 0
Close Battery voltage
2 Open Battery voltage
Close 0
ALKIA1037GB
Revision: December 20092009 QX56

PWC-48
< COMPONENT DIAGNOSIS >
REAR POWER VENT WINDOW RELAY (OPEN) CHECK
REAR POWER VENT WINDOW RELAY (OPEN) CHECK
DescriptionINFOID:0000000005864664
Rear power vent windows OPEN/CLOSE by receiving the signal from rear power vent window switch.
Diagnosis Procedure - (Early Production)INFOID:0000000005864665
1.CHECK REAR POWER VENT WINDOW RELAY (OPEN) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear power vent window relay (OPEN).
3. Turn ignition switch ON.
4. Check voltage between rear power vent window relay (OPEN) connector and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair or replace harness.
2.CHECK REAR POWER VENT WINDOW RELAY (OPEN)
Check continuity between rear power vent window relay (OPEN) ter-
minals 3 and 4, 3 and 5.
Is the inspection result normal?
YES >> GO TO 3
NO >> Replace rear power vent window relay (OPEN).
3.CHECK REAR POWER VENT WINDO W RELAY (OPEN) GROUND CIRCUIT
Check continuity between rear power vent window relay (OPEN)
connector M87 terminal 4 and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair or replace harness.
4.CHECK REAR POWER VENT WI NDOW RELAY (OPEN) CIRCUIT
ConnectorTe r m i n a l s
Voltage (V)
(Approx.)
(+) (-)
M87 1
Ground Battery voltage
5
LIIA1565E
Terminals Condition Continuity
34 12V direct current supply
between terminals 1 and 2
No
No current supply Yes
35 12V direct current supply
between terminals 1 and 2
Ye s
No current supply No
WIIA0291E
4 - Ground : Continuity should exist.
LIIA1567E
Revision: December 20092009 QX56

REAR POWER VENT WINDOW RELAY (OPEN) CHECKPWC-49
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
PWC
N
O P
1. Disconnect rear power vent window switch.
2. Check continuity between rear power vent window relay (OPEN) connector M87 terminal 2 and rear power vent window switch
connector M95 terminal 3.
Is the inspection result normal?
YES >> Refer to PWC-44, "Diagnosis Procedure - (Early Pro-
duction)".
NO >> Repair or replace harness.
Diagnosis Procedure - (Late Production)INFOID:0000000005864666
1.CHECK REAR POWER VENT WINDOW RE LAY (OPEN) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear power vent window relay (OPEN).
3. Turn ignition switch ON.
4. Check voltage between rear power vent window relay (OPEN) connector and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair or replace harness.
2.CHECK REAR POWER VENT WINDOW RELAY (OPEN)
Check continuity between rear power vent window relay (OPEN) ter-
minals 3 and 4, 3 and 5.
Is the inspection result normal?
YES >> GO TO 3
NO >> Replace rear power vent window relay (OPEN).
3.CHECK REAR POWER VENT WINDO W RELAY (OPEN) GROUND CIRCUIT
Check continuity between rear power vent window relay (OPEN)
connector M87 terminal 4 and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair or replace harness. 2 - 3 : Continuity should exist.
LIIA1568E
Connector
Te r m i n a l s
Voltage (V)
(Approx.)
(+) (-)
M87 1
Ground Battery voltage
5
LIIA1565E
Terminals Condition Continuity
34 12V direct current supply
between terminals 1 and 2
No
No current supply Yes
35 12V direct current supply
between terminals 1 and 2
Ye s
No current supply No
WIIA0291E
4 - Ground : Continuity should exist.
LIIA1567E
Revision: December 20092009 QX56

REAR POWER VENT WINDOW RELAY (CLOSE) CHECKPWC-51
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
PWC
N
O P
REAR POWER VENT WINDOW RELAY (CLOSE) CHECK
DescriptionINFOID:0000000005864667
Rear power vent windows OPEN/CLOSE by receiving the signal from rear power vent window switch.
Diagnosis Procedure - (Early Production)INFOID:0000000005864668
1.CHECK REAR POWER VENT WINDOW RE LAY (CLOSE) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear power vent window relay (CLOSE).
3. Turn ignition switch ON.
4. Check voltage between rear power vent window relay (CLOSE) connector and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair or replace harness.
2.CHECK REAR POWER VENT WINDOW RELAY (CLOSE)
Check continuity between rear pow er vent window relay (CLOSE)
terminals 3 and 4, 3 and 5.
Is the inspection result normal?
YES >> GO TO 3
NO >> Replace rear power vent window relay (CLOSE).
3.CHECK REAR POWER VENT WINDO W RELAY (CLOSE) GROUND CIRCUIT
Check continuity between rear pow er vent window relay (CLOSE)
connector M89 terminal 4 and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair or replace harness.
4.CHECK REAR POWER VENT WI NDOW RELAY (CLOSE) CIRCUIT
ConnectorTe r m i n a l s
Voltage (V)
(Approx.)
(+) (-)
M89 1
Ground Battery voltage
5
LIIA1565E
Terminals Condition Continuity
34 12V direct current supply
between terminals 1 and 2
No
No current supply Yes
35 12V direct current supply
between terminals 1 and 2
Ye s
No current supply No
WIIA0291E
4 - Ground : Continuity should exist.
LIIA1567E
Revision: December 20092009 QX56

PWC-52
< COMPONENT DIAGNOSIS >
REAR POWER VENT WINDOW RELAY (CLOSE) CHECK
1. Disconnect rear power vent window switch.
2. Check continuity between rear power vent window relay
(CLOSE) connector M89 terminal 2 and rear power vent window
switch M95 terminal 4.
Is the inspection result normal?
YES >> Refer to PWC-44, "Diagnosis Procedure - (Early Pro-
duction)".
NO >> Repair or replace harness.
Diagnosis Procedure - (Late Production)INFOID:0000000005864669
1.CHECK REAR POWER VENT WINDOW RE LAY (CLOSE) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear power vent window relay (CLOSE).
3. Turn ignition switch ON.
4. Check voltage between rear power vent window relay (CLOSE) connector and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair or replace harness.
2.CHECK REAR POWER VENT WINDOW RELAY (CLOSE)
Check continuity between rear power vent window relay (CLOSE)
terminals 3 and 4, 3 and 5.
Is the inspection result normal?
YES >> GO TO 3
NO >> Replace rear power vent window relay (CLOSE).
3.CHECK REAR POWER VENT WINDO W RELAY (CLOSE) GROUND CIRCUIT
Check continuity between rear power vent window relay (CLOSE)
connector M89 terminal 4 and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair or replace harness. 2 - 4 : Continuity should exist.
LIIA1569E
Connector
Te r m i n a l s
Voltage (V)
(Approx.)
(+) (-)
M89 1
Ground Battery voltage
5
LIIA1565E
Terminals Condition Continuity
34 12V direct current supply
between terminals 1 and 2
No
No current supply Yes
35 12V direct current supply
between terminals 1 and 2
Ye s
No current supply No
WIIA0291E
4 - Ground : Continuity should exist.
LIIA1567E
Revision: December 20092009 QX56

PWC-54
< ECU DIAGNOSIS >
BCM (BODY CONTROL MODULE)
ECU DIAGNOSIS
BCM (BODY CONTROL MODULE)
Reference ValueINFOID:0000000004065495
VALUES ON THE DIAGNOSIS TOOL
Monitor Item Condition Value/Status
AIR COND SW A/C switch OFF OFF
A/C switch ON ON
AUT LIGHT SYS Outside of the room is dark OFF
Outside of the room is bright ON
AUTO LIGHT SW Lighting switch OFF OFF
Lighting switch AUTO ON
BACK DOOR SW Back door closed OFF
Back door opened ON
CDL LOCK SW Door lock/unlock switch does not operate OFF
Press door lock/unlock switch to the LOCK side ON
CDL UNLOCK SW Door lock/unlock switch does not operate OFF
Press door lock/unlock switch to the UNLOCK side ON
DOOR SW-AS Front door RH closed OFF
Front door RH opened ON
DOOR SW-DR Front door LH closed OFF
Front door LH opened ON
DOOR SW-RL Rear door LH closed OFF
Rear door LH opened ON
DOOR SW-RR Rear door RH closed OFF
Rear door RH opened ON
ENGINE RUN Engine stopped OFF
Engine running ON
FR FOG SW Front fog lamp switch OFF OFF
Front fog lamp switch ON ON
FR WASHER SW Front washer switch OFF OFF
Front washer switch ON ON
FR WIPER LOW Front wiper switch OFF OFF
Front wiper switch LO ON
FR WIPER HI Front wiper switch OFF OFF
Front wiper switch HI ON
FR WIPER INT Front wiper switch OFF OFF
Front wiper switch INT ON
FR WIPER STOP Any position other than front wiper stop position OFF
Front wiper stop position ON
HAZARD SW When hazard switch is not pressed OFF
When hazard switch is pressed ON
LIGHT SW 1ST Lighting switch OFF OFF
Lighting switch 1st ON
Revision: December 20092009 QX56