2008 INFINITI QX56 door lock

PWC-24
< COMPONENT DIAGNOSIS >
ENCODER
1. Turn ignition switch ON.
2. Check voltage between front power window motor LH connectorand ground.
Is the measurement value within the specification?
YES >> GO TO 4
NO >> GO TO 3
3. CHECK HARNESS CONTINUITY 1
1. Turn ignition switch OFF.
2. Disconnect main power window and door lock/unlock switch and front power window motor LH.
3. Check continuity between main power window and door lock/ unlock switch connector (A) and front power window motor LH
connector (B).
4. Check continuity between main power window and door lock/unlock switch connector (A) and ground.
Is the inspection result normal?
YES >> Replace main power window and door lock/unlock switch. Refer to PWC-115, "Removal and
Installation".
NO >> Repair or replace harness.
4. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front power window motor LH.
3. Check continuity between front power window motor LH connec- tor and ground.
Is the inspection result normal?
YES >> GO TO 6
NO >> GO TO 5
5. CHECK HARNESS CONTINUITY 2
Te r m i n a l Voltage (V)(Approx.)
(+)
(–)
Front power win-
dow motor LH con- nector Te r m i n a l
D9 4Ground 10
WIIA0513E
Main power window
and door lock/unlock switch connector Te r m i n a l
Front power window
motor LH connector Terminal Continuity
D7 (A) 15 D9 (B) 4 Yes
Main power window and door lock/unlock switch connector Te r m i n a l
Ground Continuity
D7 (A) 15 No
ALKIA1021ZZ
Front power window motor
LH connector Terminal
Ground Continuity
D9 6 Yes
LIIA0923E
Revision: March 2010 2008 QX56

ENCODERPWC-25
< COMPONENT DIAGNOSIS >
C
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F
G H
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M A
B
PWC
N
O P
1. Disconnect main power window and door lock/unlock switch.
2. Check continuity between main power window and door lock/ unlock switch connector and front power window motor LH con-
nector.
Is the inspection result normal?
YES >> Replace main power window and door lock/unlock switch. Refer to PWC-115, "
Removal and Installation".
NO >> Repair or replace harness.
6. CHECK HARNESS CONTINUITY 3
1. Disconnect main power window and door lock/unlock switch.
2. Check continuity between main power window and door lock/ unlock switch connector (A) and front power window motor LH
connector (B).
3. Check continuity between main power window and door lock/ unlock switch connector (A) and ground.
Is the inspection result normal?
YES >> Replace front power wi ndow motor LH. Refer to GW-9, "Removal and Installation".
NO >> Repair or replace harness.
PASSENGER SIDE
PASSENGER SIDE : DescriptionINFOID:0000000001735680
Detects condition of the front power window motor RH operation and transmits to power window and door
lock/unlock switch RH as pulse signal.
PASSENGER SIDE : Comp onent Function CheckINFOID:0000000001735681
1.CHECK ENCODER OPERATION
Does front door glass RH perform AUTO open/close operation normally when operating power window and
door lock/unlock switch RH?
Is the inspection result normal?
YES >> Encoder operation is OK.
NO >> Refer to PWC-25, "
PASSENGER SIDE : Diagnosis Procedure".
PASSENGER SIDE : Dia gnosis ProcedureINFOID:0000000001735682
1. CHECK ENCODER SIGNAL
Main power window and
door lock/unlock switch
connector Te r m i n a l
Front power win-
dow motor LH con-
nector Terminal Continuity
D7 2 D9 6 Yes
LIIA0924E
Main power window
and door lock/unlock switch connector Te r m i n a l
Front power window
motor LH connector Terminal Continuity
D7 (A) 9
D9 (B) 5
Ye s
13 3
Main power window and door lock/unlock switch connector Te r m i n a l
GroundContinuity
D7 (A) 9
No
13
ALKIA1022ZZ
Revision: March 2010 2008 QX56

PWC-26
< COMPONENT DIAGNOSIS >
ENCODER
1. Turn ignition switch ON.
2. Check signal between power window and door lock/unlockswitch RH connector and ground with oscilloscope.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-38, "Intermittent Incident".
NO >> GO TO 2
2. CHECK FRONT POWER WINDOW MOTOR RH POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between front power window motor RH connector and ground.
Is the measurement value within the specification?
YES >> GO TO 4
NO >> GO TO 3
3. CHECK HARNESS CONTINUITY 1
1. Turn ignition switch OFF.
2. Disconnect power window and door lock/unlock switch RH and front power window motor RH.
3. Check continuity between power window and door lock/unlock
switch RH connector (A) and front power window motor RH con-
nector (B).
4. Check continuity between power window and door lock/unlock switch RH connector (A) and ground.
Te r m i n a l s
Signal
(Reference value)
(+)
(–)
Power window and door
lock/unlock switch RH connector Te r m i n a l
D105 12
Ground Refer to following
signal
15
ALKIA0322ZZ
ALKIA0305GB
Te r m i n a l
Voltage (V)(Approx.)
(+)
(–)
Front power window
motor RH connector Te r m i n a l
D105 4Ground 10
WIIA0513E
Power window and
door lock/unlock
switch RH connector Te r m i n a l
Front power window
motor RH connector
Terminal Continuity
D105 (A) 4D104 (B) 4 Yes
ALKIA1023ZZ
Revision: March 2010 2008 QX56

ENCODERPWC-27
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
PWC
N
O P
Is the inspection result normal?
YES >> Replace power window and door lock/unlock switch RH. Refer to PWC-116, "Removal and Instal-
lation".
NO >> Repair or replace harness.
4. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front power window motor RH.
3. Check continuity between front power window motor RH con- nector and ground.
Is the inspection result normal?
YES >> GO TO 6
NO >> GO TO 5
5. CHECK HARNESS CONTINUITY 2
1. Disconnect power window and door lock/unlock switch RH.
2. Check continuity between power window and door lock/unlock switch RH connector and front power window motor RH connec-
tor.
Is the inspection result normal?
YES >> Replace power window and door lock/unlock switch RH. Refer to PWC-116, "
Removal and Installation".
NO >> Repair or replace harness.
6. CHECK HARNESS CONTINUITY 3
1. Disconnect power window and door lock/unlock switch RH.
2. Check continuity between power window and door lock/unlock switch RH connector (A) and front power window motor RH con-
nector (B).
3. Check continuity between power window and door lock/unlock switch RH connector (A) and ground.
Power window and door lock/
unlock switch RH connector Te r m i n a l
GroundContinuity
D105 (A) 4 No
Front power window motor RH
connector Terminal
GroundContinuity
D104 6 Yes
LIIA0923E
Power window and door
lock/unlock switch RH connector Te r m i n a l
Front power window
motor RH connector Terminal Continuity
D105 3D104 6 Yes
LIIA1264E
Power window and
door lock/unlock
switch RH connector Te r m i n a l
Front power window
motor RH connector Terminal Continuity
D105 (A) 12
D104 (B) 3
Ye s
15 5
ALKIA1024ZZ
Revision: March 2010 2008 QX56

PWC-28
< COMPONENT DIAGNOSIS >
ENCODER
Is the inspection result normal?
YES >> Replace front power window motor RH. Refer to GW-9, "Removal and Installation".
NO >> Repair or replace harness.
REAR LH
REAR LH : DescriptionINFOID:0000000001806212
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 LH : Componen t Function CheckINFOID:0000000001806213
1. CHECK ENCODER OPERATION
Does front door glass LH 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 LH : Diagnosis ProcedureINFOID:0000000001806214
Encoder Circuit Check
1. CHECK ENCODER SIGNAL
1. Turn ignition switch ON.
2. Check the signal between rear power window control unit LH connector D209 terminal 4 and ground with oscilloscope.
OK or NG
OK >> GO TO 2
NG >> Replace rear power window control unit LH.
2. CHECK HARNESS CONTINUITY
Power window and door
lock/unlock switch RH con-
nector Te r m i n a l
GroundContinuity
D105 (A) 12
No
15
Connec-
tor Te r m i n a l s
Condition Signal
(+) (-)
D209 4 Ground Opening
LIIA2368E
OCC3383D
Revision: March 2010 2008 QX56

ENCODERPWC-31
< COMPONENT DIAGNOSIS >
C
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G H
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M A
B
PWC
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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

PWC-36
< COMPONENT DIAGNOSIS >
DOOR KEY CYLINDER SWITCH
DOOR KEY CYLINDER SWITCH
DescriptionINFOID:0000000001735687
Main power window and door lock/unlock switch detects condition of the door key cylinder and transmits to
BCM as the LOCK or UNLOCK signals.
Component Function CheckINFOID:0000000001735688
1. CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL
Check (“KEY CYL LK-SW”, “KEY CYL UN-SW”) in “DAT A MONITOR” mode for “POWER DOOR LOCK SYS-
TEM” with CONSULT-III. Refer to DLK-51, "
INTELLIGENT KEY : CONSULT-III Function (BCM - INTELLI-
GENT KEY)".
Is the inspection result normal?
YES >> Key cylinder switch is OK.
NO >> Refer to PWC-36, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001735689
1. CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between main power window and door lock/ unlock switch connector and ground.
Is the measurement value within the specification?
YES >> Replace main power window and door lock/unlock switch.
NO >> GO TO 2
2. CHECK DOOR KEY CYLINDER SIGNAL CIRCUIT
Monitor item Condition
KEY CYL LK-SW Lock
: ON
Neutral / Unlock : OFF
KEY CYL UN-SW Unlock
: ON
Neutral / Lock : OFF
Te r m i n a l s
Key positionVoltage (V)
(Approx.)
(+)
(–)
Main power window
and door lock/unlock switch connector Te r m i n a l
D7 4
Ground Lock
0
Neutral/Unlock 5
6 Unlock
0
Neutral/Lock 5
ALKIA0309ZZ
Revision: March 2010 2008 QX56

DOOR KEY CYLINDER SWITCHPWC-37
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
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M A
B
PWC
N
O P
1. Turn ignition switch OFF.
2. Disconnect main power window and door lock/unlock switch and front door lock assembly LH (key cylinder switch).
3. Check continuity between main power window and door lock/ unlock switch connector (A) and front door lock assembly LH
(key cylinder switch) connector (B).
4. Check continuity between main power window and door lock/unlock switch connector (A) and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK DOOR KEY CYLINDER SWITCH GROUND CIRCUIT
Check continuity between front door lock assembly LH (key cylinder
switch) connector and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair or replace harness.
4. CHECK DOOR KEY CYLINDER SWITCH
Check door key cylinder switch.
Refer to PWC-37, "
Component Inspection".
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-38, "Intermittent Incident".
NO >> Replace front door lock assembly LH (door key cylinder switch).
Component InspectionINFOID:0000000001735690
COMPONENT INSPECTION
1. CHECK DOOR KEY CYLINDER SWITCH
Main power window
and door lock/unlock switch connector Te r m i n a lFront door lock as-
sembly LH (key cylin-
der switch) connector Terminal Continuity
D7 (A) 4
D14 (B) 1
Ye s
66
Main power window and door lock/unlock switch connector Te r m i n a l
Ground Continuity
D7 (A) 4
No
6
ALKIA1025ZZ
Front door lock assembly LH (key
cylinder switch) connector Te r m i n a l
GroundContinuity
D14 5 Yes
LIIA1572E
Revision: March 2010 2008 QX56