2004 INFINITI QX56 Back up

AUTOMATIC BACK DOOR SYSTEM
BL-123
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BL
Revision: August 20072004 QX56
3. PINCH STRIP GROUND INSPECTION
1. Connect back door control unit.
2. Check continuity between pinch strip connector terminal 2 and
ground.
OK or NG
OK >> Replace the pinch strip.
NG >> Repair or replace harness.
Back Door Warning Chime System InspectionEIS002T7
1. BACK DOOR WARNING CHIME CIRCUIT INSPECTION
1. Disconnect back door warning chime and back door control unit.
2. Check continuity between back door control unit connector (A)
B55 terminal 6 and back door warning chime connector (B)
D514 terminal 1.
3. Check continuity between back door warning chime connector
(B) D514 terminal 1 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. WARNING CHIME CIRCUIT INSPECTION
1. Connect back door control unit.
2. Check continuity between warning chime connector D514 termi-
nal 2 and ground.
OK or NG
OK >> Replace warning chime.
NG >> Repair or replace harness.2 (B/P) - Ground : Continuity should exist.
LIIA0817E
1 (R) - 6 (R) : Continuity should exist.
1 (R) - ground : Continuity should not exist.
LIIA2258E
2 (L) - Ground : Continuity should exist.
WIIA0603E

BL-124
AUTOMATIC BACK DOOR SYSTEM
Revision: August 20072004 QX56
Half-Latch Switch System InspectionEIS002T8
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.
2. Check continuity between back door control unit connector (A)
B55 terminal 22 and back door latch (half-latch switch) connec-
tor (B) D503 terminal 6.
3. Check continuity between back door latch (half-latch switch)
connector (B) D503 terminal 6 and ground.
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.
22 (BR) - Ground
LIIA0826EPIIA2169E
6 (BR) - 22 (BR) : Continuity should exist.
6 (BR) - 22 (BR) : Continuity should not exist.
LIIA2259E
8 (B) - Ground : Continuity should exist.
LIIA0828E

AUTOMATIC BACK DOOR SYSTEM
BL-125
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BL
Revision: August 20072004 QX56
Open Switch System InspectionEIS002T9
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 control unit connector (A)
B55 terminal 15 and back door latch (open switch) connector (B)
D503 terminal 4.
3. Check continuity between back door latch (open switch) connec-
tor (B) D503 terminal 4 and ground.
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.
15 (O/L) - Ground
LIIA0829EPIIA2171E
4 (O/L) - 15 (O/L) : Continuity should exist.
4 (O/L) - ground : Continuity should not exist.
LIIA2260E
8 (B) - Ground : Continuity should exist.
LIIA0828E

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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BL
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
BL-131
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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-136
BACK DOOR LOCK
Revision: August 20072004 QX56
BACK DOOR LOCKPFP:90504
Power Back Door OpenerEIS0 02 TK
REMOVAL
1. Remove the LH luggage side upper. Refer to EI-39, "LUGGAGE FLOOR TRIM" .
2. Disconnect the power back door motor electrical connector.
3. Disconnect the ball socket from the back door.
4. Remove the power back door motor assembly.
INSTALLATION
Installation is in the reverse order of removal.
WIIA0613E