wiring INFINITI QX56 2010 Factory Service Manual

DLK-140
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR SWITCH
BACK DOOR SWITCH
Diagnosis ProcedureINFOID:0000000005147008
Regarding Wiring Diagram information, refer to
DLK-199, "Wiring Diagram—AUTOMATIC BACK DOOR SYS-
TEM—".
1.BACK DOOR AND GLASS HATCH 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: April 20092010 QX56

CINCH LATCH MOTOR SYSTEMDLK-141
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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CINCH LATCH MOTOR SYSTEM
Diagnosis ProcedureINFOID:0000000005147009
Regarding Wiring Diagram information, refer to DLK-199, "Wiring Diagram—AUTOMATIC BACK DOOR SYS-
TEM—".
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: April 20092010 QX56

DLK-142
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INTELLIGENT KEY UNIT POWER BACK DOOR INPUT SIGNAL
INTELLIGENT KEY UNIT POWER BACK DOOR INPUT SIGNAL
DescriptionINFOID:0000000005147010
Carrying the Intelligent Key, enables the driver to open the liftgate using the back door handle even when the
vehicle is locked. When lifting the handle, the back door
handle switch sends this signal to the Intelligent Key
unit which treats it as a request switch signal. When t he Intelligent Key unit, using the rear bumper antenna,
validates the presence of the Intelligent Key, it s ends 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:0000000005147011
Regarding Wiring Diagram information, refer to DLK-199, "Wiring Diagram—AUTOMATIC BACK DOOR SYS-
TEM—".
1.BACK DOOR HANDLE SWITCH SIGNAL INSPECTION
With all doors unlocked, check the back door handle operation by lifting the handle.
Did the back door respond correctly by opening?
YES >> GO TO 2
NO >> Refer to DLK-140, "
Diagnosis Procedure".
2.KEYFOB SIGNAL INSPECTION
Check keyfob operation using lock and unlock buttons.
Did the keyfob respond correctly?
YES >> GO TO 3
NO >> Refer to DLK-106, "
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 handle switch and back door control unit connectors.
3. Check continuity between Intelligent Key unit connector (A) M70 terminal 29 and back door handle 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 necessary. 29 (+) - 3 (-) : Continuity should exist.
29 (+) - Ground (-) : Conti
nuity should not exist.
ALKIA1793ZZ
Revision: April 20092010 QX56

INTELLIGENT KEY UNIT POWER BACK DOOR OUTPUT SIGNAL
DLK-143
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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INTELLIGENT KEY UNIT POWE R BACK DOOR OUTPUT SIGNAL
DescriptionINFOID:0000000005147012
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:0000000005147013
Regarding Wiring Diagram information, refer to DLK-199, "Wiring Diagram—AUTOMATIC BACK DOOR SYS-
TEM—".
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-125, "
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-106, "
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: April 20092010 QX56

DLK-144
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
HOMELINK UNIVERSAL TRANSCEIVER
HOMELINK UNIVERSAL TRANSCEIVER
Wiring DiagramINFOID:0000000005147014
ABKWA0018GB
Revision: April 20092010 QX56

DLK-146
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
HOMELINK UNIVERSAL TRANSCEIVER
Component Function Check
INFOID:0000000005147016
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-146, "
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:0000000005147017
Regarding Wiring Diagram information, refer to DLK-144, "Wiring Diagram".
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
PIIA4815E
ALKIA0659ZZ
Auto anti-dazzling inside mirror
(Homelink universal transceiver)
connector Terminal Condition
Voltage (V)
(Approx.)
R7 10 Ground Ignition switch position: LOCK Battery voltage
Revision: April 20092010 QX56

BCM (BODY CONTROL MODULE)DLK-157
< ECU DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Wiring Diagram — POWE R DOOR LOCK SYSTEM —INFOID:0000000005147021
ABKWA0521GB
Revision: April 20092010 QX56

DLK-178
< ECU DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INTELLIGENT KEY UNIT
Wiring Diagram — INTELLI GENT KEY SYSTEM —
INFOID:0000000005147027
ABKWA0486GB
Revision: April 20092010 QX56

BACK DOOR CONTROL UNITDLK-199
< ECU DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Wiring Diagram—AUTOMATIC BACK DOOR SYSTEM—INFOID:0000000005147030
ABKWA0459GB
Revision: April 20092010 QX56

SQUEAK AND RATTLE TROUBLE DIAGNOSESDLK-225
< SYMPTOM DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Insulates where slight movement is present. Ideal for instrument panel applications.
SILICONE GREASE
Used in place of UHMW tape that will be visible or not fit. Will only last a few months.
SILICONE SPRAY
Use when grease cannot be applied.
DUCT TAPE
Use to eliminate movement.
CONFIRM THE REPAIR
Confirm that the cause of a noise is repaired by test driving the vehicle. Operate the vehicle under the same
conditions as when the noise originally occurred. Refer to the notes on the Diagnostic Worksheet.
Inspection ProcedureINFOID:0000000005147044
Refer to Table of Contents for specific component removal and installation information.
INSTRUMENT PANEL
Most incidents are caused by contact and movement between:
1. The cluster lid A and instrument panel
2. Acrylic lens and combination meter housing
3. Instrument panel to front pillar garnish
4. Instrument panel to windshield
5. Instrument panel mounting pins
6. Wiring harnesses behind the combination meter
7. A/C defroster duct and duct joint
These incidents can usually be located by tapping or moving the components to duplicate the noise or by
pressing on the components while driving to stop the noi se. Most of these incidents can be repaired by apply-
ing felt cloth tape or silicon spray (in hard to reach areas). Urethane pads can be used to insulate wiring har-
ness.
CAUTION:
Do not use silicone spray to isolate a squeak or ra ttle. If you saturate the area with silicone, you will
not be able to recheck the repair.
CENTER CONSOLE
Components to pay attention to include:
1. Shifter assembly cover to finisher
2. A/C control unit and cluster lid C
3. Wiring harnesses behind audio and A/C control unit
The instrument panel repair and isolation pr ocedures also apply to the center console.
DOORS
Pay attention to the:
1. Finisher and inner panel making a slapping noise
2. Inside handle escutcheon to door finisher
3. Wiring harnesses tapping
4. Door striker out of alignment causing a popping noise on starts and stops
Tapping or moving the components or pressing on them while driving to duplicate the conditions can isolate
many of these incidents. You can usually insulate the ar eas with felt cloth tape or insulator foam blocks from
the Nissan Squeak and Rattle Kit (J-43980) to repair the noise.
TRUNK
Trunk noises are often caused by a loose jack or loose items put into the trunk by the owner.
In addition look for:
1. Trunk lid dampers out of adjustment
2. Trunk lid striker out of adjustment
3. The trunk lid torsion bars knocking together
4. A loose license plate or bracket
Revision: April 20092010 QX56