INFINITI QX4 2005 Factory Service Manual

BL-124
AUTOMATIC BACK DOOR SYSTEM
Revision: October 20052005 QX56
2. OPEN SWITCH CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit connector.
2. Check continuity between back door latch (open switch) connec-
tor D503 terminal 4 and back door control unit connector B55
terminal 15.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. OPEN SWITCH GROUND INSPECTION
Check continuity between back door latch (open switch) connector
D503 terminal 8 and ground.
OK or NG
OK >> Replace the back door latch.
NG >> Repair or replace harness.
Close Switch System InspectionEIS008RK
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 2.4 - 15 : Continuity should exist.
LIIA0830E
8 - Ground : Continuity should exist.
LIIA0828E
14 - Ground
LIIA0831EW IIA1047E

AUTOMATIC BACK DOOR SYSTEM
BL-125
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: October 20052005 QX56
2. CLOSE SWITCH CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit.
2. Check continuity between back door latch (close switch) con-
nector D503 terminal 5 and back door control unit connector
B55 terminal 14.
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.
Back Door Handle Switch System InspectionEIS008RL
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 >> Back door handle switch is OK.
NG >> GO TO 2.5 - 14 : Continuity should exist.
LIIA0832E
8 - Ground : Continuity should exist.
LIIA0828E
Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
26 GroundBack door handle switch (ON) 0
Other (OFF) Battery voltage
LIIA0833E

BL-126
AUTOMATIC BACK DOOR SYSTEM
Revision: October 20052005 QX56
2. BACK DOOR HANDLE SWITCH CIRCUIT INSPECTION
1. Disconnect back door handle switch and back door control unit.
2. Check continuity between back door handle switch connector
D706 terminal 3 and back door control unit connector B55 termi-
nal 26.
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.
Cinch Latch Motor System InspectionEIS008RM
1. CINCH LATCH MOTOR 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 terminals 11, 12
and ground.
OK or NG
OK >> GO TO 2.
NG >> Replace the back door control unit.
2. CINCH LATCH MOTOR CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit.
2. Check continuity between back door latch (cinch latch motor)
connector D503 terminals 1, 2 and back door control unit con-
nector B55 terminals 11, 12.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.3 - 26 : Continuity should exist.
WIIA0604E
4 - Ground : Continuity should exist.
WIIA0605E
11 - Ground : Battery voltage.
12 - Ground : Battery voltage.
LIIA2397E
1 - 12 : Continuity should exist.
2 - 11 : Continuity should exist.
LIIA0837E

AUTOMATIC BACK DOOR SYSTEM
BL-127
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: October 20052005 QX56
3. 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 >> Cinch latch motor is OK.
NG >> Replace the back door latch.1 (+) - 2 (-) : It operates.
1 (-) - 2 (+) : It operates. (Reverse rotation)
LIIA1937E

BL-128
DOOR
Revision: October 20052005 QX56
DOORPFP:80100
Fitting AdjustmentEIS008RN
FRONT DOOR
Longitudinal clearance and surface height adjustment at front end
1. Remove the fender. Refer to EI-20, "FRONT FENDER" .
2. Loosen the hinge bolts. Raise the front door at rear end to adjust.
3. Install the fender. Refer to EI-20, "
FRONT FENDER" .
REAR DOOR
Longitudinal clearance and surface height adjustment at front end
1. Loosen the bolts. 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.
A. 4.5 ± 1.0 mm (0.177 ± 0.039 in)
WIIA0901E
LIIA1502E

DOOR
BL-129
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: October 20052005 QX56
Removal and InstallationEIS008RO
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 door window and module assembly. Refer to GW-68, "
FRONT DOOR GLASS AND REGU-
LATOR" .
2. Remove the door harness.
3. Remove the check link cover.
4. Remove the check link bolt from the hinge pillar.
5. Remove the door-side hinge nuts and bolts, and remove the
door assembly.
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 door window and module assembly. Refer to GW-71, "
REAR DOOR GLASS AND REGULA-
TOR" .
2. Remove the door harness.
3. Remove the check link cover.
4. Remove the check link bolt from the hinge pillar.
LIIA1503E
LIIA1504E
LIIA1503E

BL-130
DOOR
Revision: October 20052005 QX56
5. Remove the door-side hinge nuts and bolts, and remove the
door assembly.
Installation is in the reverse order of removal.
BACK DOOR
WAR NIN G:
Always support 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 back door lock assembly. Refer to BL-135, "
BACK DOOR LOCK" .
3. Remove the rear wiper motor. Refer to WW-53, "
Removal and Installation of Rear Wiper Motor" .
4. Remove the back door wire harness.
5. Remove the rear washer nozzle and hose from the back door. Refer to WW-54, "
Removal and Installation
of Rear Washer Nozzle" .
CAUTION:
Two technicians should be used to avoid damaging the back door during removal.
6. Support the back door.
7. Disconnect the power back door lift arm from the door.
8. Remove the back door stays.
9. Remove the door side nuts and the back door assembly.
Installation is in the reverse order of removal.
LIIA1504E
WIIA0890E

FRONT DOOR LOCK
BL-131
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: October 20052005 QX56
FRONT DOOR LOCKPFP:80502
Component StructureEIS00629
Removal and InstallationEIS0062A
REMOVAL
1. Remove front door speaker. Refer to AV- 4 5 , “Removal and Installation of Front Door Speaker”.
2. Remove the front door speaker housing and vapor sheet.
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. Key cylinder
10. Outside handle bracket 11. Front gasket 12. Outside handle
13. Door key cylinder assembly (Driver
side) Outside handle escutcheon
(Passenger side)14. Rear gasket
WIIA0891E
Torx bolt 5.3 N·m (0.54 kg-m, 47 in-lb)
PIIA3553E
PIIA3554E

BL-132
FRONT DOOR LOCK
Revision: October 20052005 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, 00 in-lb)
PIIA1090E
PIIA3558E

FRONT DOOR LOCK
BL-133
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: October 20052005 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 AssemblyEIS008RR
DOOR KEY CYLINDER ASSEMBLY
Remove the key cylinder escutcheon pawl and remove the door key cylinder.
PIIA5059E
PIIA4136E