door lock INFINITI QX4 2005 Factory Owner's Guide

POWER DOOR LOCK SYSTEM
BL-29
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Revision: October 20052005 QX56
Trouble Diagnoses Symptom ChartEIS008PL
BCM Power Supply and Ground Circuit CheckEIS008PM
1. CHECK FUSE AND FUSIBLE LINK
Check the following BCM fuse and fusible link.
NOTE:
Refer to BL-99, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of problem before installing new fuse, refer to PG-4,
"POWER SUPPLY ROUTING CIRCUIT" .
Symptom Repair order Refer to page
Key reminder door function does not operate
properly.1. Door switch checkBL-31
2. Key switch (insert) checkBL-33
3. Replace BCM.BCS-20
Power door lock does not operate with door lock
and unlock switch on main power window and
door lock/unlock switch or power window and
door lock/unlock switch RH.1. Door lock/unlock switch checkBL-34
2. Replace BCM.BCS-20
Front door lock assembly LH (actuator) does not
operate.1. Front door lock assembly LH (Actuator) checkBL-38
Specific door lock actuator does not operate.1. Front door lock actuator RH checkBL-392. Rear door lock actuator RH/LH checkBL-40
3. Back doorBL-99
Power door lock does not operate with front door
key cylinder LH operation.1. Front door lock assembly LH (key cylinder
switch) checkBL-42
2. Replace BCM.BCS-20
Power door lock does not operate.1. BCM power supply and ground circuit checkBL-292. Door lock/unlock switch checkBL-34
Back door opener does not operate.1. Back door power supply and ground circuit
inspectionBL-1152. Door switch checkBL-31
3. Power liftgate switch system inspectionBL-116
Glass hatch lock actuator does not operate.1. Glass hatch switch checkBL-362. Glass hatch lock actuator checkBL-41
3. Replace BCM.BCS-20
Component Parts Terminal No. (SIGNAL) Ampere No. Location
BCM 57 (BAT power supply) 15A 22 Fuse block (J/B)
BCM 70 (BAT power supply) 50AfFuse and fusible link box

BL-30
POWER DOOR LOCK SYSTEM
Revision: October 20052005 QX56
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check voltage between BCM connector M20 terminals 57, 70
and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK GROUND CIRCUIT
Check continuity between BCM connector M20 terminal 67 and
ground.
OK or NG
OK >> Power supply and ground circuit is OK.
NG >> Repair or replace harness.
ConnectorTe r m i n a l s
Voltage (V)
(Approx.)
(+) (-)
M2057
Ground Battery voltage
70
LIIA1039E
Connector Terminals Continuity
M20 67 Ground Yes
LIIA1040E

POWER DOOR LOCK SYSTEM
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Revision: October 20052005 QX56
Door Switch CheckEIS008PN
1. CHECK DOOR SWITCHES INPUT SIGNAL
With CONSULT-II
Check door switches ("DOOR SW-DR", "DOOR SW-AS", "DOOR SW-RL", "DOOR SW-RR", "BACK DOOR
SW") in DATA MONITOR mode with CONSULT–II.Refer to BL-27, "
DATA MONITOR" .

When doors are open:

When doors are closed:
Without CONSULT-II
Check voltage between BCM connector M18 or M19 terminals 12,
13, 43, 47, 48 and ground.
OK or NG
OK >> Door switch circuit is OK.
NG >> GO TO 2.DOOR SW-DR : ON
DOOR SW-AS : ON
DOOR SW-RL : ON
DOOR SW-RR : ON
BACK DOOR SW : ON
DOOR SW-DR : OFF
DOOR SW-AS : OFF
DOOR SW-RL : OFF
DOOR SW-RR : OFF
BACK DOOR SW : OFF
LIIA0665E
Connector ItemTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (–)
M19Back door
latch (door
ajar switch)43
GroundOpen
↓
Closed0
↓
Battery voltage Front door
switch LH47
Rear door
switch LH48
M18Front door
switch RH12
Rear door
switch RH13
LIIA1041E

BL-32
POWER DOOR LOCK SYSTEM
Revision: October 20052005 QX56
2. CHECK DOOR SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door switch and BCM.
3. Check continuity between door switch connector (B) B8 (front LH), B108 (front RH), B18 (rear LH), B116
(rear RH) terminal 2 or back door latch connector (C) D503 terminal 7 and BCM connectors (A) M18, M19
terminals 12, 13, 43, 47 and 48.
4. Check continuity between door switch connector (B) B8 (front
LH), B108 (front RH), B18 (rear LH), B116 (rear RH) terminal 2
or back door latch connector (C) D503 terminal 7 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK DOOR SWITCHES
FRONT AND REAR DOORS
Check continuity between front or rear door switch terminal 2 and
exposed metal of switch while pressing and releasing switch.
BACK DOOR
Check continuity between back door latch connector (A) D503 termi-
nals 7 and 8 while pressing (closing back door) and releasing (open-
ing back door) switch.
OK or NG
OK >> (Front and rear doors) Switch circuit is OK.
OK >> (Back door) GO TO 4.
NG >> Replace door switch.2 - 12 : Continuity should exist.
2 - 13 : Continuity should exist.
2 - 47 : Continuity should exist.
2 - 48 : Continuity should exist.
7 - 43 : Continuity should exist.
2 - Ground : Continuity should not exist.
7 - Ground : Continuity should not exist.
WIIA0750E
Door switch is released : Continuity should exist.
Door switch is pushed : Continuity should not exist.
WIIA0644E
When back door is open : Continuity should exist.
When back door is closed : Continuity should not exist.
WIIA0752E

POWER DOOR LOCK SYSTEM
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Revision: October 20052005 QX56
4. CHECK BACK DOOR SWITCH GROUND
Check continuity between back door latch connector terminal 8 and
ground.
OK or NG
OK >> Back door switch circuit is OK.
NG >> Repair or replace harness.
Key Switch (Insert) CheckEIS008PO
1. CHECK KEY SWITCH INPUT SIGNAL
With CONSULT-II
Check key switch "KEY ON SW" in DATA MONITOR mode with CONSULT–II. Refer to BL-27, "
DATA MONI-
TOR" .

When key is inserted to ignition key cylinder:

When key is removed from ignition key cylinder:
Without CONSULT-II
Check voltage between BCM connector M18 terminal 37 and
ground.
OK or NG
OK >> Key switch (insert) circuit is OK.
NG >> GO TO 2.8 - Ground : Continuity should exist.
LIIA0828E
KEY ON SW : ON
KEY ON SW : OFF
LIIA0169E
ConnectorTe r m i n a l s
Condition Voltage (V)
(+) (–)
M18 37 GroundKey is inserted. Battery voltage
Key is removed. 0
LIIA0567E

BL-34
POWER DOOR LOCK SYSTEM
Revision: October 20052005 QX56
2. CHECK KEY SWITCH (INSERT)
1. Turn ignition switch OFF.
2. Disconnect key switch and key lock solenoid.
3. Check continuity between key switch and key lock solenoid terminals 3, 4.
OK or NG
OK >> Repair or replace harness.
NG >> Replace key switch.
Door Lock/Unlock Switch CheckEIS008PP
1. CHECK DOOR LOCK/UNLOCK SWITCH INPUT SIGNAL
With CONSULT-II
Check door lock/unlock switch ("CDL LOCK SW", "CDL UNLOCK SW") in DATA MONITOR mode in CON-
SULT–II. Refer to BL-27, "
DATA MONITOR"

When door lock/unlock switch is turned to LOCK:

When door lock/unlock switch is turned to UNLOCK:
Without CONSULT-II
1. Remove key from ignition key cylinder.
2. Check the signal between BCM connector M18 terminal 22 and ground with oscilloscope when door lock/
unlock switch 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 door lock/unlock switch is turned to LOCK or UNLOCK.
OK or NG
OK >> Door lock and unlock switch circuit is OK.
NG >> GO TO 2.
Terminals Condition Continuity
3 – 4Key is inserted. Yes
Key is removed. No
LIIA1044E
CDL LOCK SW :ON
CDL UNLOCK SW :ON
PIIA6538E
ConnectorTe r m i n a l s
Voltage (V)
(+) (–)
M18 22 Ground
PIIA6379EPIIA1297E

POWER DOOR LOCK SYSTEM
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Revision: October 20052005 QX56
2. CHECK DOOR LOCK/UNLOCK SWITCH GROUND HARNESS
1. Turn ignition switch OFF.
2. Disconnect main power window and door lock/unlock switch or power window and door lock/unlock switch
RH
3. Check continuity between main power window and door lock/
unlock switch connector D8 terminal 17 and ground.
4. Check continuity between power window and door lock/unlock
switch RH connector D105 terminal 11 and ground
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK POWER WINDOW BUS CIRCUIT FOR OPEN
1. Disconnect BCM.
2. Check continuity between BCM connector M18 terminal 22 and
main power window and door lock/unlock switch connector D7
terminal 14.
3. Check continuity between BCM connector M18 terminal 22 and
power window and door lock/unlock switch RH connector D105
terminal 16.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.17 - Ground : Continuity should exist.
LIIA0392E
11 - Ground : Continuity should exist.
LIIA1140E
22 - 14 : Continuity should exist.
LIIA0394E
22 - 16 : Continuity should exist.
LIIA1271E

BL-36
POWER DOOR LOCK SYSTEM
Revision: October 20052005 QX56
4. CHECK POWER WINDOW BUS CIRCUIT FOR SHORT
Check continuity between BCM connector M18 terminal 22 and
ground.
OK or NG
OK >> Replace main power window and door lock/unlock switch or power window and door lock/unlock
switch RH
NG >> Repair or replace harness.
Glass Hatch Switch Circuit InspectionEIS008PQ
1. CHECK GLASS HATCH SWITCH
1. Turn ignition switch OFF.
2. Insure front door lock actuator RH is in the unlock position.
3. Check continuity between glass hatch switch terminal 2 and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. CHECK HARNESS CONTINUITY
1. Disconnect glass hatch switch.
2. Disconnect BCM.
3. Check continuity between BCM connector M18 (A) terminal 30
and glass hatch switch connector D710 (B) terminal 2.
4. Check continuity between BCM connector M18 (A) terminal 30
and ground.
OK or NG
OK >> Glass hatch switch circuit is OK.
NG >> Repair or replace harness.22 - Ground : Continuity should not exist.
LIIA2359E
Connec-
torTe r m i n a l s
Condition Continuity
(+) (–)
D710 2 GroundWith the glass hatch switch
pressedYe s
With the glass hatch switch
releasedNo
LIIA2399E
30 - 2 : Continuity should exist.
30 - Ground : Continuity should not exist.
LIIA2400E

POWER DOOR LOCK SYSTEM
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Revision: October 20052005 QX56
3. CHECK GLASS HATCH SWITCH
1. Disconnect glass hatch switch.
2. Check continuity between glass hatch switch terminal 1 and
ground.
OK or NG
OK >> Replace glass hatch switch.
NG >> GO TO 4.
4. CHECK HARNESS CONTINUITY
1. Disconnect front door lock actuator RH.
2. Check continuity between glass hatch switch connector D710
(A) terminal 1 and front door lock actuator RH connector D114
(B) terminal 4
OK or NG
OK >> GO TO 5.
NG >> Repair or replace harness.
5. CHECK FRONT DOOR LOCK ACTUATOR RH
Check continuity between front door lock actuator RH connector
D114 terminal 5 and ground
OK or NG
OK >> Replace front door lock actuator RH.
NG >> Repair or replace harness.1 - Ground : Continuity should exist.
LIIA2401E
1 - 4 : Continuity should exist.
LIIA2402E
5 - Ground : Continuity should exist.
LIIA2403E

BL-38
POWER DOOR LOCK SYSTEM
Revision: October 20052005 QX56
Front Door Lock Assembly LH (Actuator) CheckEIS008PR
1. CHECK DOOR LOCK ACTUATOR SIGNAL
1. Turn ignition switch OFF.
2. Check voltage between BCM connector M20 terminals 59, 65
and ground.
OK or NG
OK >> GO TO 2.
NG >> Replace BCM. Refer to BCS-20, "
Removal and Installation of BCM" .
2. CHECK DOOR LOCK ACTUATOR HARNESS
1. Disconnect BCM and front door lock assembly LH (actuator).
2. Check continuity between BCM connector M20 terminals 59, 65
and front door lock assembly LH (actuator) connector D14 termi-
nals 2, 3.
3. Check continuity between BCM connector M20 terminals 59, 65
and ground.
OK or NG
OK >> Replace front door lock assembly LH (actuator). Refer to BL-131, "FRONT DOOR LOCK" .
NG >> Repair or replace harness.
ConnectorTerminals
ConditionVoltage (V)
(Approx.)
(+) (-)
M2059
GroundDriver door lock/unlock
switch is turned to
UNLOCK0 → Battery voltage
65Driver door lock/unlock
switch is turned to LOCK0 → Battery voltage
LIIA1046E
Connector Terminals Connector Terminals Continuity
M2059
D142Yes
65 3 Yes
Connector Terminals Continuity
M2059
GroundNo
65 No
LIIA1574E