2009 INFINITI QX56 turn signal

DOOR LOCK AND UNLOCK SWITCHDLK-75
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
C
D
E
F
G H
I
J
L
M A
B
DLK
N
O P
NO >> GO TO 2
2.CHECK BCM OUTPUT SIGNAL
1. Turn ignition switch OFF.
2. Using the vehicle operational Intelligent Key, pr ess and hold the UNLOCK button for more than 3 sec-
onds.
Is the inspection result normal?
YES >> GO TO 3
NO >> Replace BCM. Refer to BCS-56, "
Removal and Installation".
3.CHECK DOOR LOCK/UNLOCK SWITCH GROUND HARNESS
1. Disconnect main power window and door lock/unlock switch.
2. Check continuity between main power window and door lock/ unlock switch connector D8 terminal 17 and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair or replace harness.
4.CHECK POWER WINDOW SERIAL LINK CIRCUIT
1. Disconnect BCM.
2. Check continuity between BCM connector M18 term inal 22 and main power window and door lock/unlock
switch connector D7 terminal 14.
3. Check continuity between BCM connector M18 terminal 22 and ground. The front windows should be lowered.
17 - Ground
: Continuity should exist.
LIIA0392E
22 - 14: Continuity should exist.
LIIA0394E
22 - Ground: Continuity should not exist.
LIIA2359E
Revision: December 20092009 QX56

DLK-76
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DOOR LOCK AND UNLOCK SWITCH
Is the inspection result normal?
YES >> Replace main power window and door lock/unlock switch.
NO >> Repair or replace harness.
PASSENGER SIDE
PASSENGER SIDE : DescriptionINFOID:0000000003775735
Transmits door lock/unlock operation to BCM.
PASSENGER SIDE : Component Function CheckINFOID:0000000003775736
1.CHECK FUNCTION
With CONSULT-III
Check CDL LOCK SW, CDL UNLOCK SW in Data Monitor mode with CONSULT-III.
Is the inspection result normal?
YES >> Door lock and unlock switch is OK.
NO >> Refer to DLK-76, "
PASSENGER SIDE : Diagnosis Procedure".
PASSENGER SIDE : Diagnosis ProcedureINFOID:0000000004190668
1.CHECK DOOR LOCK/UNLOCK SWITCH INPUT SIGNAL
With CONSULT-III
Check power window and door lock/unlock switch RH ("CDL LOCK SW", "CDL UNLOCK SW") in DATA MON-
ITOR mode in CONSULT–III.
• When power window and door lock/unlock switch RH is turned to LOCK:
• When power window and door lock/unlock switch RH is turned to UNLOCK:
Without CONSULT-III
1. Remove key from ignition key cylinder.
2. Using an oscilloscope, check the signal between BCM connector M18 terminal 22 and ground when power window and door lock/unlock switch RH is turned to LOCK or UNLOCK.
3. Make sure the signals which are shown in the figure below can be detected during 10 seconds just after the power window and door lock/unlock switch RH is turned to LOCK or UNLOCK.
Monitor item Condition
CDL LOCK SW LOCK
: ON
UNLOCK : OFF
CDL UNLOCK SW LOCK
: OFF
UNLOCK : ON
CDL LOCK SW :ON
CDL UNLOCK SW :ON
ConnectorTe r m i n a l
Voltage (V)
( + ) ( – )
M18 22 Ground
PIIA6379EPIIA1297E
Revision: December 20092009 QX56

DOOR LOCK AND UNLOCK SWITCHDLK-77
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
C
D
E
F
G H
I
J
L
M A
B
DLK
N
O P
Is the inspection normal?
YES >> Power window and door lock/unlock switch RH circuit is OK.
NO >> GO TO 2
2.CHECK BCM OUTPUT SIGNAL
1. Turn ignition switch OFF.
2. Using the vehicle operational Intelligent Key, pr ess and hold the UNLOCK button for more than 3 sec-
onds.
Is the inspection normal?
YES >> GO TO 3
NO >> Replace BCM. Refer to BCS-56, "
Removal and Installation".
3.CHECK DOOR LOCK/UNLOCK SWITCH GROUND HARNESS
1. Disconnect power window and door lock/unlock switch RH.
2. Check continuity between power window and door lock/unlock switch RH connector D105 terminal 11 and ground
Is the inspection normal?
YES >> GO TO 4
NO >> Repair or replace harness.
4.CHECK POWER WINDOW SERIAL LINK CIRCUIT
1. Disconnect BCM.
2. Check continuity between BCM connector M18 terminal 22 and power window and door lock/unlock
switch RH connector D105 terminal 16.
3. Check continuity between BCM connector M18 terminal 22 and ground. The front windows should be lowered.
11 - Ground
: Continuity should exist.
LIIA1140E
22 - 16 : Continuity should exist.
LIIA0395E
22 - ground: Continuity should not exist.
LIIA2359E
Revision: December 20092009 QX56

KEY CYLINDER SWITCHDLK-79
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
C
D
E
F
G H
I
J
L
M A
B
DLK
N
O P
KEY CYLINDER SWITCH
DescriptionINFOID:0000000003775738
The main power window and door lock/unlock switch det ects condition of the door key cylinder switch and
transmits to BCM as the LOCK or UNLOCK signal.
Component Function CheckINFOID:0000000003775739
1.CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL
Check "KEY CYL LK-SW" AND "KEY CYL UN-SW" in DATA MONITOR mode for “POWER DOOR LOCK
SYSTEM” with CONSULT-III.
Is the inspection result normal?
YES >> Key cylinder switch is OK.
NO >> Refer to DLK-79, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003775740
1.CHECK DOOR KEY CYLINDER SWITCH LH
With CONSULT-III
Check front door lock assembly LH (key cylinder switch) ("KEY CYL LK-SW") and ("KEY CYL UN-SW) in
DATA MONITOR mode with CONSULT–III.
• When key inserted in left front key cylinder is turned to LOCK:
• When key inserted in left front key cylinder is turned to UNLOCK:
Without CONSULT-III
Check voltage between main power window and door lock/unlock
switch connector D7 terminals 4, 6 and ground.
Is the inspection result normal?
YES >> Key cylinder switch signal is OK.
NO >> GO TO 2
2.CHECK DOOR KEY CYLINDER SWITCH LH GROUND HARNESS
1. Turn ignition switch OFF.
2. Disconnect front door lock assembly LH (key cylinder switch).
Monitor item Condition
KEY CYL LK-SW Lock
: ON
Neutral / Unlock : OFF
KEY CYL UN-SW Unlock
: ON
Neutral / Lock : OFF
KEY CYL LK-SW : ON
KEY CYL UN-SW : ON
ConnectorTe r m i n a l s
Condition of left front key cylinder Voltage (V)
(Approx.)
(+) (–)
D7 4
Ground Neutral/Unlock
5
Lock 0
6 Neutral/Lock
5
Unlock 0
LIIA0566E
Revision: December 20092009 QX56

DLK-84
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DOOR REQUEST SWITCH
4. Check continuity between Inte
lligent Key unit harness connector
(A) M70 terminals 5 (driver door), 25 (passenger door) and
ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness between Intelligent Key unit and front door request switch.
3.CHECK FRONT DOOR REQUEST SWITCH GROUND CIRCUIT
Check continuity between front door request switch harness connector D16 (driver door), D116 (passenger
door) terminal 2 and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair or replace door request switch ground circuit.
4.CHECK FRONT DOOR REQUEST SWITCH OPERATION
Refer to DLK-84, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 5
NO >> Replace front door request switch.
5.CHECK FRONT DOOR REQUEST SWITCH SIGNAL
1. Connect Intelligent Key unit connector.
2. Check voltage between Intelligent Key unit harness connector M70 terminals 5, 25 and ground.
Is the inspection result normal?
YES >> Refer to GI-38, "Intermittent Incident".
NO >> Replace Intelligent Key unit. Refer to S E C - 111 , "
Removal and Installation".
Component InspectionINFOID:0000000003775748
1.CHECK FRONT DOOR REQUEST SWITCH OPERATION
1. Turn ignition switch OFF. Driver side 5 - 1 : Continuity should exist.
Passenger side 25 - 1 : Continuity should exist.
5 - Ground
: Continuity should not exist.
25 - Ground : Continuity should not exist.
PIIB6614E
2 - Ground : Continuity should exist.
PIIB6616E
Connector Item Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (–)
M70 Front door re-
quest switch
LH
5
Ground Door request
switch is pressed
↓
Door request switch is re- leased 0
↓
Battery voltage
Front door re-
quest switch
RH 25
WIIA1183E
Revision: December 20092009 QX56

DLK-86
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DOOR LOCK ACTUATOR
DOOR LOCK ACTUATOR
DRIVER SIDE
DRIVER SIDE : DescriptionINFOID:0000000003775749
Locks/unlocks the door with the signal from BCM.
DRIVER SIDE : Component Function CheckINFOID:0000000003775750
1.CHECK FUNCTION
1. Use CONSULT-III to perform Active Test "DOOR LOCK".
2. Touch “ALL LOCK” or “ALL UNLOCK” to check that it works normally.
Is the inspection result normal?
YES >> Door lock actuator is OK.
NO >> Refer to DLK-86, "
DRIVER SIDE : Diagnosis Procedure".
DRIVER SIDE : Diagnosis ProcedureINFOID:0000000003775751
1.CHECK DOOR LOCK ACTUATOR SIGNAL
1. Turn ignition switch OFF.
2. Check voltage between BCM connector M20 terminals 59, 65 and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> GO TO 3
2.CHECK DOOR LOCK ACTUATOR HARNESS
1. Disconnect BCM and front door lock assembly LH (actuator).
2. Check continuity between BCM connector (A) M20 terminals 59, 65 and front door lock assembly LH (actuator) connector (B)
D14 terminals 2, 3.
Is the inspection result normal?
YES >> Replace front door lock assembly LH (actuator).
NO >> Repair or replace harness.
3.CHECK DOOR LOCK ACTUATOR HARNESS
1. Disconnect BCM and front door lock assembly LH (actuator).
Connector Te r m i n a l s
Condition Voltage (V)
(Approx.)
(+) (-)
M20 59
Ground Driver door lock/unlock
switch is turned to UN-
LOCK
0
→ Battery voltage
65 Driver door lock/unlock
switch is turned to LOCK
0
→ Battery voltage
LIIA1046E
Connector Terminals Connector Terminals Continuity
M20 59
D14 2Y
es
65 3Yes
ALKIA0632ZZ
Revision: December 20092009 QX56

DOOR LOCK ACTUATORDLK-87
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
C
D
E
F
G H
I
J
L
M A
B
DLK
N
O P
2. Check continuity between BCM connector M20 terminals 59, 65 and ground.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-56, "Removal and Installation".
NO >> Repair or replace harness.
PASSENGER SIDE
PASSENGER SIDE : DescriptionINFOID:0000000003775752
Locks/unlocks the door with the signal from BCM.
PASSENGER SIDE : Co mponent Function CheckINFOID:0000000003775753
1.CHECK FUNCTION
1. Use CONSULT-III to perform Active Test DOOR LOCK.
2. Touch “ALL LOCK” or “ALL UNLOCK” to check that it works normally.
Is the inspection result normal?
YES >> Door lock actuator is OK.
NO >> Refer to DLK-87, "
PASSENGER SIDE : Diagnosis Procedure".
PASSENGER SIDE : Dia gnosis ProcedureINFOID:0000000003775754
1.CHECK FRONT DOOR LOCK ACTUATOR RH SIGNAL
1. Turn ignition switch OFF.
2. Check voltage between BCM connector M20 terminals 65, 66 and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> GO TO 3
2.CHECK DOOR LOCK ACTUATOR HARNESS
1. Disconnect BCM and front door lock actuator RH.
Connector Terminals Continuity
M20 59
Ground No
65 No
ALKIA0633ZZ
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
M20 65
Ground Door lock/unlock switch is
turned to LOCK
0
→ Battery voltage
for 300 ms
66 Door lock/unlock switch is
turned to UNLOCK 0
→ Battery voltage
for 300 ms
LIIA1048E
Revision: December 20092009 QX56

DLK-88
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DOOR LOCK ACTUATOR
2. Check continuity between BCM connector (A) M20 terminals 65,
66 and front door lock actuator RH (B) D114 terminals 2, 3.
Is the inspection result normal?
YES >> Replace front door lock actuator RH. Refer to DLK-238, "Removal and Installation".
NO >> Repair or replace harness.
3.CHECK DOOR LOCK ACTUATOR HARNESS
1. Disconnect BCM and front door lock actuator RH.
2. Check continuity between BCM connector M19 terminals 65, 66 and ground.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-56, "Removal and Installation".
NO >> Repair or replace harness.
REAR LH
REAR LH : DescriptionINFOID:0000000003775755
Locks/unlocks the door with the signal from BCM.
REAR LH : Component Function CheckINFOID:0000000003775756
1.CHECK FUNCTION
1. Use CONSULT-III to perform Active Test "DOOR LOCK".
2. Touch “ALL LOCK” or “ALL UNLOCK” to check that it works normally.
Is the inspection result normal?
YES >> Door lock actuator is OK.
NO >> Refer to DLK-88, "
REAR LH : Diagnosis Procedure".
REAR LH : Diagnosis ProcedureINFOID:0000000003775757
1.CHECK DOOR LOCK ACTUATOR SIGNAL
1. Turn ignition switch OFF.
Terminal Continuity
65 3 Yes
66 2 Yes
ALKIA0630ZZ
Terminals Continuity
65 Ground No
66 No
ALKIA0631ZZ
Revision: December 20092009 QX56