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![INFINITI QX56 2008 Factory Service Manual DLK-128
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR CLOSE (CANCEL) SWITCH SYSTEM
BACK DOOR CLOSE (CANCEL) SWITCH SYSTEM
Diagnosis ProcedureINFOID:0000000001539037
1.BACK DOOR CLOSE INFINITI QX56 2008 Factory Service Manual DLK-128
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR CLOSE (CANCEL) SWITCH SYSTEM
BACK DOOR CLOSE (CANCEL) SWITCH SYSTEM
Diagnosis ProcedureINFOID:0000000001539037
1.BACK DOOR CLOSE](/manual-img/42/57030/w960_57030-920.png)
DLK-128
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR CLOSE (CANCEL) SWITCH SYSTEM
BACK DOOR CLOSE (CANCEL) SWITCH SYSTEM
Diagnosis ProcedureINFOID:0000000001539037
1.BACK DOOR CLOSE SWITCH FUNCTION INSPECTION
Check back door close (cancel) switch using switch operation.
Is the inspection result normal?
YES >> Back door close switch is OK.
NO >> GO TO 2
2.BACK DOOR CLOSE (CANCEL) SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While operating the back door close (cancel) switch, check volt- age between back door control unit connector B55 terminal 13
and ground.
Is the inspection result normal?
YES >> Switch is OK.
NO >> GO TO 3
3.BACK DOOR CLOSE (CANCEL) SWITCH CIRCUIT INSPECTION
1. Disconnect back door close switch and back door control unit connector.
2. Check continuity between back door control unit connector (A) B55 terminal 13 and back door close switch connector (B) B63
terminal 5.
3. Check continuity between back door control unit connector (A) B55 terminal 13 and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair the harness between the back door close switch and the back door control unit.
4.BACK DOOR CLOSE SWITCH GROUND INSPECTION
Check continuity between back door close switch connector B63 ter-
minal 3 and ground.
Is the inspection result normal?
YES >> Replace the back door close switch.
NO >> Repair the harness between the back door close switch and ground.
Te r m i n a l s Measuring condition Voltage (V)
(Approx.)
(+) (-)
13 Ground Back door
close switch ON
0
OFF 5
LIIA1068E
13 - 5 : Continuity should exist.
13 - Ground : Continuity should not exist.
ALKIA0671ZZ
3 - Ground : Continuity should exist.
WIIA0602E
Revision: March 2010 2008 QX56
Page 922 of 4083
![INFINITI QX56 2008 Factory Service Manual PINCH STRIP SYSTEMDLK-129
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Diagnosis ProcedureINFOID:0000000001539038
1.PINCH STRIP SIGNAL INS INFINITI QX56 2008 Factory Service Manual PINCH STRIP SYSTEMDLK-129
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Diagnosis ProcedureINFOID:0000000001539038
1.PINCH STRIP SIGNAL INS](/manual-img/42/57030/w960_57030-921.png)
PINCH STRIP SYSTEMDLK-129
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PINCH STRIP SYSTEM
Diagnosis ProcedureINFOID:0000000001539038
1.PINCH STRIP SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While operating the pinch strip, check voltage between back door control unit connector B55 terminals 19, 20 and ground.
Is the inspection result normal?
YES >> Switch is OK.
NO >> GO TO 2
2.PINCH STRIP CIRCUIT INSPECTION
1. Disconnect pinch strip and ba ck door control unit connector.
2. Check continuity between back door control unit connector (A) B55 terminals 5, 19 (RH) or 5, 20 (LH) and pinch strip connector
(B) D715 (RH), D517 (LH) terminals 1, 2.
3. Check continuity between pinch strip connector (B) D715 (RH), D517 (LH) terminals 1, 2 and ground.
Is the inspection result normal?
YES >> Replace the pinch strip.
NO >> Repair the harness between the pinc h strip and the back door control unit.
Te r m i n a l s
Measuring condition Voltage (V)
(Approx.)
(+) (-)
19 Ground Pinch strip RH operation 0
Other 4
20 Ground Pinch strip LH operation 0
Other 4
LIIA0811E
RH: 1 - 19 : Continuity should exist.
LH: 1 - 20 : Continuity should exist.
RH and LH 2 - 5 : Continuity should exist.
1 - Ground : Continuity should not exist.
2 - Ground : Continuity should not exist.
ALKIA0672ZZ
Revision: March 2010 2008 QX56
Page 923 of 4083
![INFINITI QX56 2008 Factory Service Manual DLK-130
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR WARNING CHIME SYSTEM
BACK DOOR WARN
ING CHIME SYSTEM
Diagnosis ProcedureINFOID:0000000001539039
1.BACK DOOR WARNING CHI ME CIRCUI INFINITI QX56 2008 Factory Service Manual DLK-130
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR WARNING CHIME SYSTEM
BACK DOOR WARN
ING CHIME SYSTEM
Diagnosis ProcedureINFOID:0000000001539039
1.BACK DOOR WARNING CHI ME CIRCUI](/manual-img/42/57030/w960_57030-922.png)
DLK-130
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR WARNING CHIME SYSTEM
BACK DOOR WARN
ING CHIME SYSTEM
Diagnosis ProcedureINFOID:0000000001539039
1.BACK DOOR WARNING CHI ME CIRCUIT INSPECTION
1. Disconnect back door control unit and back door warning chime.
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 control unit connector (A) B55 terminal 6 and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair or replace the harness between t he warning chime and the back door control unit.
2.WARNING CHIME CIRCUIT INSPECTION
1. Check continuity between back door control unit connector (A) B55 terminal 9 and back door warning chime connector (B)
D514 terminal 2.
2. Check continuity between back door control unit connector (A) B55 terminal 9 and ground.
Is the inspection result normal?
YES >> Replace warning chime.
NO >> Repair or replace the harness between t he warning chime and the back door control unit.
6 - 1 : Continuity should exist.
6 - Ground : Continuity should not exist.
ALKIA0673ZZ
9 - 2
: Continuity should exist.
9 - Ground : Continuity should not exist.
ALKIA0674ZZ
Revision: March 2010 2008 QX56
Page 924 of 4083
![INFINITI QX56 2008 Factory Service Manual HALF-LATCH SWITCH SYSTEMDLK-131
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Diagnosis ProcedureINFOID:0000000001539040
1.HALF-LATCH INFINITI QX56 2008 Factory Service Manual HALF-LATCH SWITCH SYSTEMDLK-131
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Diagnosis ProcedureINFOID:0000000001539040
1.HALF-LATCH](/manual-img/42/57030/w960_57030-923.png)
HALF-LATCH SWITCH SYSTEMDLK-131
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HALF-LATCH SWITCH SYSTEM
Diagnosis ProcedureINFOID:0000000001539040
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.
Is the inspection result normal?
YES >> Half-latch switch is OK.
NO >> GO TO 2
2.HALF-LATCH SWITCH CIRCUIT INSPECTION
1. Disconnect back door latch switch and back 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) D705 terminal 6.
3. Check continuity between back control unit connector (A) B55 terminal 22 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair the harness between the back door latch (half-latch switch) and the back door control unit.
3.HALF-LATCH SWITCH GROUND INSPECTION
Check continuity between back door latch (half-latch switch) connec-
tor D705 terminal 8 and ground.
Is the inspection result normal?
YES >> Replace the back door latch.
NO >> Repair the harness between the back door latch (half- latch switch) and ground.
22 - Ground
LIIA0826EPIIA2169E
22 - 6 : Continuity should exist.
22 - Ground : Continuity should not exist.
ALKIA0675ZZ
8 - Ground : Continuity should exist.
LIIA0828E
Revision: March 2010 2008 QX56
Page 925 of 4083
![INFINITI QX56 2008 Factory Service Manual DLK-132
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR OPEN SWITCH SYSTEM
BACK DOOR OPEN SWITCH SYSTEM
Diagnosis ProcedureINFOID:0000000001539041
1.OPEN SWITCH SIGNAL INSPECTION
1. Tur INFINITI QX56 2008 Factory Service Manual DLK-132
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR OPEN SWITCH SYSTEM
BACK DOOR OPEN SWITCH SYSTEM
Diagnosis ProcedureINFOID:0000000001539041
1.OPEN SWITCH SIGNAL INSPECTION
1. Tur](/manual-img/42/57030/w960_57030-924.png)
DLK-132
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR OPEN SWITCH SYSTEM
BACK DOOR OPEN SWITCH SYSTEM
Diagnosis ProcedureINFOID:0000000001539041
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.
Is the inspection result normal?
YES >> Open switch is OK.
NO >> 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)
D705 terminal 4.
3. Check continuity between back door control unit connector (A) B55 terminal 15 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair the harness between the back door la tch (open switch) and the back door control unit.
3.OPEN SWITCH GROUND INSPECTION
Check continuity between back door latch (open switch) connector
D705 terminal 8 and ground.
Is the inspection result normal?
YES >> Replace the back door latch.
NO >> Repair the harness between the back door latch (open switch) and ground.
15 - Ground
LIIA0829EWIIA1047E
15 - 4 : Continuity should exist.
15 - Ground : Continuity should not exist.
ALKIA0676ZZ
8 - Ground : Continuity should exist.
LIIA0828E
Revision: March 2010 2008 QX56
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![INFINITI QX56 2008 Factory Service Manual BACK DOOR CLOSE SWITCH SYSTEMDLK-133
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Diagnosis ProcedureINFOID:0000000001539042
1. INFINITI QX56 2008 Factory Service Manual BACK DOOR CLOSE SWITCH SYSTEMDLK-133
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Diagnosis ProcedureINFOID:0000000001539042
1.](/manual-img/42/57030/w960_57030-925.png)
BACK DOOR CLOSE SWITCH SYSTEMDLK-133
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BACK DOOR CLOSE SWITCH SYSTEM
Diagnosis ProcedureINFOID:0000000001539042
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.
Is the inspection result normal?
YES >> Close switch is OK.
NO >> GO TO 2
2.CLOSE 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 14 and back door latch (close switch) connector
(B) D705 terminal 5.
3. Check continuity between back door control unit connector (A) B55 terminal 14 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair the harness between the back door latc h (close switch) and the back door control unit.
3.CLOSE SWITCH GROUND INSPECTION
Check continuity between back door latch (close switch) connector
D705 terminal 8 and ground.
Is the inspection result normal?
YES >> Replace the back door latch.
NO >> Repair the harness between the back door latch (close switch) and ground.
14 - Ground
LIIA0831EWIIA1047E
14 - 5 : Continuity should exist.
14 - Ground : Continuity should not exist.
ALKIA0677ZZ
8 - Ground : Continuity should exist.
LIIA0828E
Revision: March 2010 2008 QX56
Page 927 of 4083
![INFINITI QX56 2008 Factory Service Manual DLK-134
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR SWITCH
BACK DOOR SWITCH
Diagnosis ProcedureINFOID:0000000001539043
1.BACK DOOR AND GLASS HAT
CH SWITCH SIGNAL INSPECTION
1. Turn INFINITI QX56 2008 Factory Service Manual DLK-134
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR SWITCH
BACK DOOR SWITCH
Diagnosis ProcedureINFOID:0000000001539043
1.BACK DOOR AND GLASS HAT
CH SWITCH SIGNAL INSPECTION
1. Turn](/manual-img/42/57030/w960_57030-926.png)
DLK-134
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR SWITCH
BACK DOOR SWITCH
Diagnosis ProcedureINFOID:0000000001539043
1.BACK DOOR AND GLASS HAT
CH SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While operating the back door and glass hatch switch assembly (back door switch), check voltage between back door control
unit connector B55 terminal 26 and ground.
Is the inspection result normal?
YES >> Switch is OK.
NO >> GO TO 2
2.BACK DOOR AND GLASS HAT CH SWITCH CIRCUIT INSPECTION
1. Disconnect back door and glass hatch switch assemb ly (back door switch) and back door control unit.
2. Check continuity between back door control unit connector (A) B55 terminal 26 and back door and glass hatch switch assembly
(back door switch) connector (B) D706 terminal 3.
3. Check continuity between back door control unit connector (A) B55 terminal 26 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair the harness between the back door and gla ss hatch switch assembly (back door switch)
and the back door control unit.
3.BACK DOOR AND GLASS HAT CH SWITCH GROUND INSPECTION
Check continuity between back door and glass hatch switch assem-
bly (back door switch) connector D706 terminal 4 and ground.
Is the inspection result normal?
YES >> Replace the back door and glass hatch switch assembly (back door switch).
NO >> Repair the harness between the back door and glass hatch switch assembly (back door switch) and ground.
Te r m i n a l Measuring condition Voltage (V)
(Approx.)
(+) (-)
26 GroundPush the back door and glass
hatch switch assembly (back door switch) (ON) 0
Other (OFF) Battery voltage
LIIA0833E
26 - 3 : Continuity should exist.
26 - Ground : Continuity should not exist.
ALKIA1791ZZ
4 - Ground : Continuity should exist.
ALKIA1792ZZ
Revision: March 2010 2008 QX56
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![INFINITI QX56 2008 Factory Service Manual CINCH LATCH MOTOR SYSTEMDLK-135
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Diagnosis ProcedureINFOID:0000000001539044
1.CINCH LATC INFINITI QX56 2008 Factory Service Manual CINCH LATCH MOTOR SYSTEMDLK-135
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Diagnosis ProcedureINFOID:0000000001539044
1.CINCH LATC](/manual-img/42/57030/w960_57030-927.png)
CINCH LATCH MOTOR SYSTEMDLK-135
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CINCH LATCH MOTOR SYSTEM
Diagnosis ProcedureINFOID:0000000001539044
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 c onnector B55 terminals 11, 12
and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Replace the back door control unit.
2.CINCH LATCH MOTOR CIRCUIT INSPECTION
1. Disconnect back door latch and back door control unit connector.
2. Check continuity between back door control unit connector (A) B55 terminals 11, 12 and back door latch (cinch latch motor)
connector D705 (B) terminals 1, 2.
3. Check continuity between back door control unit connector (A) B55 terminals 11, 12 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair the harness between the back door latch (cinch latch motor) and the back door control unit.
3.CINCH LATCH MOTOR OPERATION INSPECTION
Connect battery power to terminals 1 and 2 on the back door latch
connector and check motor operation.
Is the inspection result normal?
YES >> Motor is OK.
NO >> Replace the back door latch.
11 - Ground
12 - Ground Battery voltage
LIIA2397E
11 - 2
: Continuity should exist.
12 - 1 : Continuity should exist.
11 - Ground : Continuity should not exist.
12 - Ground : Continuity should not exist.
ALKIA0679ZZ
1 (+) - 2 (-) : It operates.
1 (-) - 2 (+) : It operates. (Reverse rotation)
LIIA0838E
Revision: March 2010 2008 QX56