2008 INFINITI QX56 air condition

PWC-30
< COMPONENT DIAGNOSIS >
ENCODER
1. Disconnect rear power window control unit LH.
2. Check continuity between rear power window motor LH connec-tor D204 terminal 6 and rear power window control unit LH con-
nector D209 terminal 3.
OK or NG
OK >> Replace rear power window control unit LH.
NG >> Repair or replace harness.
7. CHECK REAR POWER WINDOW MO TOR LH LIMIT SWITCH SIGNAL
1. Turn ignition switch ON.
2. Check voltage between rear power window control unit LH con- nector and ground.
OK or NG
OK >> Limit switch circuit is OK.
NG >> GO TO 8
8. CHECK REAR POWER WINDOW SWITCH LH OUTPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between rear power window control unit LH har- ness connector D209 terminal 2 and ground.
OK or NG
OK >> GO TO 9
NG >> Replace rear power window control unit LH.
9. CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect rear power window control unit LH.
3. Check continuity between rear power window control unit LH connector D209 terminal 2 and rear power window motor LH
connector D204 terminal 5.
OK or NG
OK >> Replace rear power window motor LH. Refer to GW-13,
"Removal and Installation".
NG >> Repair or replace harness.
REAR RH
6 - 3 : Continuity should exist.
LIIA1383E
ConnectorTe r m i n a l s
Condition Voltage (V)
(Approx.)
(+) (-)
D209 3 Ground Rear power window LH is be-
tween fully-open and just be-
fore fully-close
d position (ON) 0
Rear power window LH is be-
tween just before fully-closed
position and fully-closed posi-
tion (OFF) 5
LIIA2366E
2 - Ground
: Approx. 5V
LIIA2367E
2 - 5: Continuity should exist.
LIIA1385E
Revision: March 2010 2008 QX56

ENCODERPWC-31
< COMPONENT DIAGNOSIS >
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REAR RH : DescriptionINFOID:0000000001806215
Detects condition of the front power window motor LH operation and transmits to main power window and door
lock/unlock switch as pulse signal.
REAR RH : Component Function CheckINFOID:0000000001806217
1. CHECK ENCODER OPERATION
Does front door glass RH perform AUTO open/close operation normally when operating main power window
and door lock/unlock switch?
Is the inspection result normal?
YES >> Encoder operation is OK.
NO >> Refer to PWC-31, "
REAR RH : Diagnosis Procedure"
REAR RH : Diagnosis ProcedureINFOID:0000000001806218
Encoder Circuit Check
1. CHECK ENCODER SIGNAL
1. Turn ignition switch ON.
2. Check the signal between rear power window control unit RH connector D309 terminal 4 and ground with oscilloscope.
OK or NG
OK >> GO TO 2
NG >> Replace rear power window control unit RH.
2. CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect rear power window control unit RH and rear power window motor RH.
3. Check continuity between rear power window control unit RH
connector D309 terminal 4 and rear power window motor RH
connector D304 terminal 3.
OK or NG
OK >> GO TO 3
NG >> Repair or replace harness.
3. CHECK REAR POWER WINDOW MOTOR RH POWER SUPPLY
Connec- tor Te r m i n a l s
Condition Signal
(+) (-)
D309 4 Ground Opening
LIIA2368E
OCC3383D
4 - 3 : Continuity should exist.
LIIA1389E
Revision: March 2010 2008 QX56

ENCODERPWC-33
< COMPONENT DIAGNOSIS >
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1. Turn ignition switch ON.
2. Check voltage between rear power window control unit RH con- nector and ground.
OK or NG
OK >> Limit switch circuit is OK.
NG >> GO TO 8
8. CHECK REAR POWER WINDOW SWITCH RH OUTPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between rear power window control unit RH har- ness connector D309 terminal 2 and ground.
OK or NG
OK >> GO TO 9
NG >> Replace rear power window control unit RH.
9. CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect rear power window control unit RH.
3. Check continuity between rear power window control unit RH connector D309 terminal 2 and rear power window motor RH
connector D304 terminal 5.
OK or NG
OK >> Replace rear power window motor RH. Refer to GW-13,
"Removal and Installation".
NG >> Repair or replace harness.
Connector Te r m i n a l s
Condition Voltage (V)
(Approx.)
(+) (-)
D209 3 Ground Rear power window RH is be-
tween fully-open and just be-
fore fully-closed position (ON)
0
Rear power window RH is be-
tween just before fully-closed
position and fully-closed posi-
tion (OFF) 5
LIIA2366E
2 - Ground
: Approx. 5V
LIIA2367E
2 - 5 : Continuity should exist.
LIIA1385E
Revision: March 2010 2008 QX56

PWC-44
< COMPONENT DIAGNOSIS >
REAR POWER VENT WINDOW SWITCH CIRCUIT CHECK
REAR POWER VENT WINDOW SWITCH CIRCUIT CHECK
DescriptionINFOID:0000000001735699
Rear power vent window motor LH and RH will be operated if rear power vent window switch is operated.
Diagnosis ProcedureINFOID:0000000001735700
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.
2. CHECK REAR POWER VENT WINDOW SWITCH CIRCUIT HARNESS CONTINUITY
Check continuity between rear power 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.
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
Revision: March 2010 2008 QX56

REAR POWER VENT WINDOW MOTOR LH CIRCUIT CHECK
PWC-45
< COMPONENT DIAGNOSIS >
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REAR POWER VENT WINDOW MOTOR LH CIRCUIT CHECK
DescriptionINFOID:0000000001735701
Rear power vent windows OPEN/CLOSE by receiving the signal from rear power vent window switch.
Diagnosis ProcedureINFOID:0000000001735702
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-15, "Removal and Installation".
NO >> Repair or replace harness.
Connector Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
B52 1
Ground Opening Battery voltage
Closing 0
2 Opening
0
Closing Battery voltage
ALKIA1037GB
Revision: March 2010 2008 QX56

PWC-46
< COMPONENT DIAGNOSIS >
REAR POWER VENT WINDOW MOTOR RH CIRCUIT CHECK
REAR POWER VENT WINDOW MOTOR RH CIRCUIT CHECK
DescriptionINFOID:0000000001735703
Rear power vent windows OPEN/CLOSE by receiving the signal from rear power vent window switch.
Diagnosis ProcedureINFOID:0000000001735704
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 LH con- nector B150 terminals 1, 2 and ground.
Is the inspection result normal?
YES >> Replace rear power vent window motor RH. Refer to GW-15, "Removal and Installation".
NO >> Repair or replace harness.
Connector Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
B150 1
Ground Opening Battery voltage
Closing 0
2 Opening
0
Closing Battery voltage
ALKIA1037GB
Revision: March 2010 2008 QX56

REAR POWER VENT WINDOW RELAY (OPEN) CHECK
PWC-47
< COMPONENT DIAGNOSIS >
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REAR POWER VENT WINDOW RELAY (OPEN) CHECK
DescriptionINFOID:0000000001735705
Rear power vent windows OPEN/CLOSE by receiving the signal from rear power vent window switch.
Diagnosis ProcedureINFOID:0000000001735706
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 WINDOW 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: March 2010 2008 QX56

REAR POWER VENT WINDOW RELAY (CLOSE) CHECKPWC-49
< COMPONENT DIAGNOSIS >
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REAR POWER VENT WINDOW RELAY (CLOSE) CHECK
DescriptionINFOID:0000000001735707
Rear power vent windows OPEN/CLOSE by receiving the signal from rear power vent window switch.
Diagnosis ProcedureINFOID:0000000001735708
1.CHECK REAR POWER VENT WINDOW RELAY (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 WINDOW 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: March 2010 2008 QX56