2007 INFINITI QX56 service

AUTOMATIC BACK DOOR SYSTEM
BL-101
< SERVICE INFORMATION >
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Back Door Warning Chime System InspectionINFOID:0000000003532971
1.BACK DOOR WARNING CHIME CIRCUIT INSPECTION
1. Disconnect back door warning chime and back door control unit.
2. Check continuity between back door warning chime connector
D514 terminal 1 and back door control unit connector B55 termi-
nal 6.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2.WARNING CHIME CIRCUIT INSPECTION
Check continuity between back door warning chime connector D514
terminal 2 and back door control unit connector B55 terminal 9.
OK or NG
OK >> Replace warning chime.
NG >> Repair or replace harness.
Half-Latch Switch System InspectionINFOID:0000000003532972
1.HALF-LATCH 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 22 and
ground.
OK or NG
OK >> Half-latch switch is OK.
NG >> GO TO 2.
2.HALF-LATCH SWITCH CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit connector.1 - 6 : Continuity should exist.
LIIA0822E
2 - 9 : Continuity should exist.
LIIA2182E
22 - Ground
LIIA0826EPIIA2169E

BL-102
< SERVICE INFORMATION >
AUTOMATIC BACK DOOR SYSTEM
2. Check continuity between back door latch (half-latch switch)
connector D503 terminal 6 and back door control unit connector
B55 terminal 22.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3.HALF-LATCH SWITCH GROUND INSPECTION
Check continuity between back door latch (half-latch switch) connec-
tor D503 terminal 8 and ground.
OK or NG
OK >> Replace the back door latch.
NG >> Repair or replace harness.
Open Switch System InspectionINFOID:0000000003532973
1.OPEN SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While fully closing and opening the back door, check voltage
between back door control unit connector B55 terminal 15 and
ground.
OK or NG
OK >> Open switch is OK.
NG >> GO TO 2.
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.6 - 22 : Continuity should exist.
LIIA0827E
8 - Ground : Continuity should exist.
LIIA0828E
15 - Ground
LIIA0829EWIIA1047E
4 - 15 : Continuity should exist.
LIIA0830E

AUTOMATIC BACK DOOR SYSTEM
BL-103
< SERVICE INFORMATION >
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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 InspectionINFOID:0000000003532974
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 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 INSPECTION8 - Ground : Continuity should exist.
LIIA0828E
14 - Ground
LIIA0831EWIIA1047E
5 - 14 : Continuity should exist.
LIIA0832E

BL-104
< SERVICE INFORMATION >
AUTOMATIC BACK DOOR SYSTEM
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 InspectionINFOID:0000000003532975
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.
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.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
3 - 26 : Continuity should exist.
WIIA0604E
4 - Ground : Continuity should exist.
WIIA0605E

AUTOMATIC BACK DOOR SYSTEM
BL-105
< SERVICE INFORMATION >
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Cinch Latch Motor System InspectionINFOID:0000000003532976
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.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.
11 - Ground
12 - Ground Battery voltage
LIIA2397E
1 - 12 : Continuity should exist.
2 - 11 : Continuity should exist.
LIIA0837E
1 (+) - 2 (-) : It operates.
1 (-) - 2 (+) : It operates. (Reverse rotation)
LIIA1937E

BL-106
< SERVICE INFORMATION >
DOOR
DOOR
Fitting AdjustmentINFOID:0000000003532977
Front door
Longitudinal clearance and surface height adjustment at front end
1. Remove the fender. Refer to EI-19.
2. Loosen the hinge bolts. Raise the front door at rear end to adjust.
3. Install the fender. Refer to EI-19
.
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
D. 4.5 ± 1.0 mm (0.177 ± 0.039 in)
AWKIA0675ZZ

DOOR
BL-107
< SERVICE INFORMATION >
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1. Adjust the striker so that it becomes parallel with the lock inser-
tion direction.
Removal and InstallationINFOID:0000000003532978
FRONT DOOR
Removal
CAUTION:
• When removing and installing the door assembly, support the door with a jack and shop cloth to pro-
tect 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-59
.
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
Installation is in the reverse order of removal.
REAR DOOR
Removal
CAUTION:
• When removing and installing the door assembly, support the door with a jack and shop cloth to pro-
tect 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".
LIIA1502E
LIIA1503E
LIIA1504E

BL-108
< SERVICE INFORMATION >
DOOR
1. Remove the door window and module assembly. Refer to GW-62.
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
Installation is in the reverse order of removal.
BACK DOOR
Removal
WARNING:
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
.
2. Remove the back door lock assembly. Refer to BL-114
.
3. Remove the rear wiper motor. Refer to WW-37, "
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-39, "
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.
LIIA1503E
LIIA1504E