INFINITI QX56 2004 Factory Service Manual

BL-126
AUTOMATIC BACK DOOR SYSTEM
Revision: August 20072004 QX56
Close Switch System InspectionEIS002TA
1. CLOSE SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While fully opening and closing the back door, check voltage
between back door control unit connector B55 terminal 14 and-
ground.
OK or NG
OK >> Close switch is OK.
NG >> GO TO 2.
2. CLOSE SWITCH CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit.
2. Check continuity between back door control unit connector (A)
B55 terminal 14 and back door latch (close switch) connector
(B) D503 terminal 5.
3. Check continuity between back door latch (close switch) con-
nector (B) D503 terminal 5 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CLOSE SWITCH GROUND INSPECTION
Check continuity between back door latch (close switch) connector
D503 terminal 8 and ground.
OK or NG
OK >> Replace the back door latch.
NG >> Repair or replace harness.
14 (P) - Ground
LIIA0831EPIIA2172E
5 (P) - 14 (P) : Continuity should exist.
5 (P) - ground : Continuity should not exist.
LIIA2261E
8 (B) - Ground : Continuity should exist.
LIIA0828E

AUTOMATIC BACK DOOR SYSTEM
BL-127
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Revision: August 20072004 QX56
Back Door Handle Switch System InspectionEIS002TB
1. BACK DOOR HANDLE SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While operating the back door handle switch, check voltage
between back door control unit connector B55 terminal 26 and
ground.
OK or NG
OK >> Switch is OK.
NG >> GO TO 2.
2. BACK DOOR HANDLE SWITCH CIRCUIT INSPECTION
1. Disconnect back door handle switch and back door control unit.
2. Check continuity between back door control unit connector (A)
B55 terminal 26 and back door handle switch connector (B)
D706 terminal 3.
3. Check continuity between back door handle switch connector
(B) D706 terminal 3 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
3. BACK DOOR HANDLE SWITCH GROUND INSPECTION
Check continuity between back door handle switch connector D706
terminal 4 and ground.
OK or NG
OK >> Replace the back door handle switch.
NG >> Repair or replace harness.
Connector terminal
(Wire color)
ConditionVoltage (V)
(Approx.)
( + ) ( - )
26 (V) GroundBack door handle switch (ON) 0
Other (OFF) 5
LIIA0833E
3 (V) - 26 (V) : Continuity should exist.
3 (V) - 26 (V) : Continuity should not exist.
LIIA2262E
4 (B) - Ground : Continuity should exist.
WIIA0605E

BL-128
AUTOMATIC BACK DOOR SYSTEM
Revision: August 20072004 QX56
Cinch Latch Motor System InspectionEIS002TC
1. CINCH LATCH MOTOR CIRCUIT INSPECTION
1. Turn ignition switch OFF.
2. Disconnect back door latch and back door control unit.
3. Check continuity between back door control unit connector (A)
B55 terminals 11, 12 and back door latch (cinch latch motor)
connector (B) D503 terminals 1, 2.
4. Check continuity between back door latch (cinch latch motor)
connector (B) D503 terminals 1, 2 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. CINCH LATCH MOTOR OPERATION INSPECTION
Connect battery power to terminals 1 and 2 on the back door latch
and check motor operation.
OK or NG
OK >> GO TO 3.
NG >> Replace the back door latch.
3. CINCH LATCH MOTOR SIGNAL INSPECTION
1. Reconnect back door latch and back door control unit.
2. While fully opening and closing the back door, check voltage
between back door control unit connector B55 terminals 11, 12
and ground.
OK or NG
OK >> Cinch latch motor circuit is OK.
NG >> Replace the back door control unit.1 (L) - 12 (L) : Continuity should exist.
2 (Y) - 11 (Y) : Continuity should exist.
1 (L) - ground : Continuity should not exist.
2 (Y) - ground : Continuity should not exist.
LIIA2263E
1 (+) - 2 (-) : It operates.
1 (-) - 2 (+) : It operates. (Reverse rotation)
LIIA1937E
11 (Y) - Ground
12 (L) - Ground
LIIA0836ESIIA1480E

DOOR
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Revision: August 20072004 QX56
DOORPFP:80100
Fitting AdjustmentEIS0 02 T D
FRONT DOOR
Longitudinal clearance and surface height adjustment at front end
1. Remove the front fender. Refer to EI-20, "FRONT FENDER" .
2. Loosen the hinge bolts. Raise the front door at rear end to adjust.
REAR DOOR
Longitudinal clearance and surface height adjustment at front end
1. Remove the center pillar upper finisher. Refer to EI-34, "BODY SIDE TRIM" .
2. Accessing from inside the vehicle, loosen the nuts. Open the rear door, and raise the rear door at rear end
to adjust.
STRIKER ADJUSTMENT
1. Adjust the striker so that it becomes parallel with the lock inser-
tion direction.
WIIA0583E
LIIA1502E

BL-130
DOOR
Revision: August 20072004 QX56
Removal and InstallationEIS0 02 TE
FRONT DOOR
CAUTION:

When removing and installing the door assembly, support the door with a jack and shop cloth to
protect the door and body.

When removing and installing door assembly, be sure to carry out the fitting adjustment.

Check the hinge rotating part for poor lubrication. If necessary, apply "body grease".
1. Remove the front door lock assembly. Refer to BL-132, "
FRONT DOOR LOCK" .
2. Remove the door harness.
3. Remove the check link cover.
4. Remove the bolt from the check link on the door hinge pillar.
5. Remove the door-side hinge nuts and bolts and the door assem-
bly.
Installation is in the reverse order of removal.
REAR DOOR
CAUTION:

When removing and installing the door assembly, support the door with a jack and shop cloth to
protect the door and body.

When removing and installing door assembly, be sure to carry out the fitting adjustment.

Check the hinge rotating part for poor lubrication. If necessary, apply "body grease".
1. Remove the rear door lock assembly. Refer to BL-135, "
REAR DOOR LOCK" .
2. Remove the door harness.
3. Remove the check link cover.
4. Remove the bolt from the check link on the door hinge pillar.
LIIA1503E
LIIA1504E
LIIA1503E

DOOR
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Revision: August 20072004 QX56
5. Remove the door-side hinge nuts and bolts and the door assem-
bly.
Installation is in the reverse order of removal.
BACK DOOR
WA RN ING:
Always support the back door when removing or replacing back door stays. Power back door opener
will not support back door with back door stays removed.
1. Remove the back door glass. Refer to GW-13, "
REAR WINDOW GLASS AND MOLDING" .
2. Remove the license lamp finisher. Refer to EI-24, "
LICENSE LAMP FINISHER" .
3. Remove the back door lock assembly. Refer to BL-136, "
BACK DOOR LOCK" .
4. Remove the rear wiper motor. Refer to WW-51, "
Removal and Installation of Rear Wiper Motor" .
5. Remove the back door wire harness.
6. Remove the rear washer nozzle and hose from the back door. Refer to WW-52, "
Removal and Installation
of Rear Washer Nozzle"
CAUTION:
Two technicians should be used to avoid damaging the back door during removal.
7. Support the back door.
8. Disconnect the power back door lift arm from the door.
9. Remove the back door stays.
10. Remove the door side nuts and the back door assembly.
Installation is in the reverse order of removal.
LIIA1504E
LIIA1898E

BL-132
FRONT DOOR LOCK
Revision: August 20072004 QX56
FRONT DOOR LOCKPFP:80502
Component StructureEIS002TF
Removal and InstallationEIS006BK
REMOVAL
1. Remove the front door glass regulator. Refer to GW-70, "FRONT DOOR GLASS REGULATOR" .
2. Remove the front door window rear glass run.
3. Remove the door side grommet, and the bolt (TORX T30) from
the grommet hole.
4. While pulling the outside handle, remove the door key cylinder
assembly or escutcheon.
1. Grommet 2. Front door striker 3. Door lock assembly
4. Outside handle cable 5. Inside handle assembly 6. Inside handle cable
7. Door lock cable 8. Key cylinder rod (Driver side only) 9. Door lock cylinder
10. Outside handle bracket 11. Front gasket 12. Outside handle
13. Door key cylinder escutcheon
(Driver side) Outside handle
escutcheon (Passenger side)14. Rear gasket
LIIA1728E
Torx bolt 5.3 N·m (0.54 kg-m, 47 in-lb)
PIIA3553E
PIIA3554E

FRONT DOOR LOCK
BL-133
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Revision: August 20072004 QX56
5. Separate the key cylinder rod from the door key cylinder assembly (if equipped).
6. While pulling the outside handle, slide it toward rear of vehicle to
remove.
7. Remove the front and rear gaskets.
8. Remove the TORX bolts (T30), and the door lock assembly.
9. While pulling the outside handle bracket, slide it toward the rear
of vehicle to remove it and the door lock assembly.
10. Disconnect the door lock actuator electrical connector.
LIIA0532E
PIIA3557E
Door lock assembly bolts 7.5 N·m (0.77 kg-m, 66 in-lb)
PIIA1090E
PIIA3558E

BL-134
FRONT DOOR LOCK
Revision: August 20072004 QX56
11. Separate the outside handle cable connection from the outside
handle bracket.
INSTALLATION
Installation in the reverse order of removal.
CAUTION:
To install each rod, be sure to rotate the rod holder until a click is felt.
Disassembly and AssemblyEIS006BL
DOOR KEY CYLINDER ASSEMBLY
Remove the key cylinder escutcheon pawl and remove the door key cylinder.
PIIA5059E
PIIA4136E

REAR DOOR LOCK
BL-135
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Revision: August 20072004 QX56
REAR DOOR LOCKPFP:82502
Component StructureEIS002TI
Removal and InstallationEIS002TJ
REMOVAL
1. Remove the rear door glass regulator. Refer to GW-73, "REAR DOOR GLASS REGULATOR" .
2. Remove door grommets, and the outside handle nuts from grommet hole.
3. Remove outside handle.
4. Disconnect the outside handle cable connection.
5. Remove the inside door handle actuator.
6. Disconnect the door lock actuator connector.
7. Remove the door lock actuator assembly.
INSTALLATION
Installation is in the reverse order of removal.
LIIA1465E