2008 INFINITI QX56 key

BACK DOOR CLOSE SWITCH SYSTEMDLK-133
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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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

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

CINCH LATCH MOTOR SYSTEMDLK-135
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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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

DLK-136
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INTELLIGENT KEY UNIT POWER BACK DOOR INPUT SIGNAL
INTELLIGENT KEY UNIT POWER BACK DOOR INPUT SIGNAL
DescriptionINFOID:0000000001539045
Carrying the Intelligent Key, enables the driver to
open the liftgate using the back door switch even when the
vehicle is locked. When pressing the back door switch, the back door switch sends this signal to the Intelligent
Key unit which treats it as a request switch signal. When the Intelligent Key unit, using the rear bumper
antenna, validates the presence of the Intelligent Key, it sends an open signal to the back door control unit
regardless whether the vehicle is locked.
Rear bumper antenna is mounted on the rear bumper and is used to allow the back door handle opening of
the locked back door when the Intelligent Key is present.
Diagnosis ProcedureINFOID:0000000001539046
1.BACK DOOR SWITCH SIGNAL INSPECTION
With all doors unlocked, check the back door switch operation by pressing the back door switch.
Did the back door respond correctly by opening?
YES >> GO TO 2
NO >> Refer to DLK-134, "
Diagnosis Procedure".
2.KEYFOB SIGNAL INSPECTION
Check keyfob operation using lock and unlock buttons.
Did the keyfob operate correctly?
YES >> GO TO 3
NO >> Refer to DLK-102, "
Diagnosis Procedure".
3.INTELLIGENT KEY UNIT SIGNAL INSPECTION
NOTE:
Since the diode is a uni-directional component, pay close attention to the polarity of the ohmmeter
being used as the presence of a diode in the circuit will affect the result.
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit, back door sw itch and back door control unit connectors.
3. Check continuity between Intelligent Key unit connector (A) M70 terminal 29 and back door switch connector (B) D706 terminal 3.
4. Check continuity between Intelligent Key unit connector (A) M70 terminal 29 and ground.
Is the inspection result normal?
YES >> Replace the Intelligent Key unit.
NO >> Repair or replace the harness or the diode as neces- sary.
29 (+) - 3 (-) : Continuity should exist.
29 (+) - Ground (-) : Conti
nuity should not exist.ALKIA1793ZZ
Revision: March 2010 2008 QX56

INTELLIGENT KEY UNIT POWER BACK DOOR OUTPUT SIGNAL
DLK-137
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INTELLIGENT KEY UNIT POWE R BACK DOOR OUTPUT SIGNAL
DescriptionINFOID:0000000001539047
The keyfob of the Intelligent Key unit is capable of opening and closing the power back door. The driver can
open or close the liftgate by pressing the liftgate button regardless whether the vehicle is locked provided the
keyfob is within operating range.
Diagnosis ProcedureINFOID:0000000001539048
1.POWER LIFTGATE SWITCH FUNCTION INSPECTION
Check power liftgate switch using switch operation.
Did the back door respond correctly?
YES >> GO TO 2
NO >> Refer to DLK-121, "
Diagnosis Procedure".
2.KEYFOB SIGNAL INSPECTION
Check keyfob operation using lock and unlock buttons.
Did the keyfob operate correctly?
YES >> GO TO 3
NO >> Refer to DLK-102, "
Diagnosis Procedure".
3.INTELLIGENT KEY UNIT SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit, back door cont rol unit and power liftgate switch connectors.
3. Check continuity between Intelligent Key unit connector (A) M70
terminal 23 and back door control unit connector (B) B55 termi-
nal 23.
4. Check continuity between Intelligent Key unit connector (A) M70 terminal 23 and ground.
Is the inspection result normal?
YES >> Replace Intelligent Key unit.
NO >> Repair or replace the harness as necessary. 23 - 23 : Continuity should exist.
23 - Ground : Continuity should not exist.
ALKIA0680ZZ
Revision: March 2010
2008 QX56

DLK-138
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
HOMELINK UNIVERSAL TRANSCEIVER
HOMELINK UNIVERSAL TRANSCEIVER
Wiring DiagramINFOID:0000000001744759
ALKWA0076GB
Revision: March 2010
2008 QX56

HOMELINK UNIVERSAL TRANSCEIVERDLK-139
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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DescriptionINFOID:0000000001539049
Homelink universal transceiver can store and transmit a maximum of 3 radio signals.
Allows operation of garage doors, gates, home and office lighting, entry door locks and security system, etc.
Homelink universal transceiver power supply uses vehicle battery, which enables it to maintain every program
in case battery is discharged or removed.
ALKIA0650GB
Revision: March 2010 2008 QX56

DLK-140
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
HOMELINK UNIVERSAL TRANSCEIVER
Component Function Check
INFOID:0000000001539050
1.CHECK FUNCTION
Check that system receiver (garage door opener, et c.) operates with original hand-held transmitter.
Is the inspection result normal?
YES >> GO TO 2
NO >> Receiver or hand-held transmitter is malfunctioning.
2.CHECK ILLUMINATION
1. Turn ignition switch “OFF”.
2. Press each of the transmitter buttons and watch for the red light
to illuminate with each button.
Is the inspection result normal?
YES >> GO TO 3
NO >> Refer to DLK-140, "
Diagnosis Procedure".
3.CHECK TRANSMITTER
Check transmitter with Tool*.
*:For details, refer to Technical Service Bulletin.
Is the inspection result normal?
YES >> Receiver or hand-held transmitter malfunction, not vehicle related.
NO >> Replace auto anti-dazzling inside mirror (homelink universal transceiver).
Diagnosis ProcedureINFOID:0000000001539051
1.CHECK POWER SUPPLY
1. Disconnect auto anti-dazzling inside mirror (homelink universal transceiver) connector.
2. Check voltage between auto anti-dazzling inside mirror (homelink universal transceiver) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Check the following. • 10A fuse [No. 19 located in the fuse block (J/B)]
• Harness for open or short between fuse and auto anti-dazzling inside mirror (homelink universaltransceiver).
PIIA4815E
ALKIA0659ZZ
Auto anti-dazzling inside mirror
(Homelink universal transceiver) connector Terminal Condition
Voltage (V)
(Approx.)
R4 10Ground Ignition switch position: LOCK Battery voltage
Revision: March 2010 2008 QX56