2009 INFINITI QX56 key

DLK-134
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR WARNING CHIME SYSTEM
BACK DOOR WARN
ING CHIME SYSTEM
Diagnosis ProcedureINFOID:0000000003775807
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: December 20092009 QX56

HALF-LATCH SWITCH SYSTEMDLK-135
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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DLK
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HALF-LATCH SWITCH SYSTEM
Diagnosis ProcedureINFOID:0000000003775808
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: December 20092009 QX56

DLK-136
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR OPEN SWITCH SYSTEM
BACK DOOR OPEN SWITCH SYSTEM
Diagnosis ProcedureINFOID:0000000003775809
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: December 20092009 QX56

BACK DOOR CLOSE SWITCH SYSTEMDLK-137
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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BACK DOOR CLOSE SWITCH SYSTEM
Diagnosis ProcedureINFOID:0000000003775810
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: December 20092009 QX56

DLK-138
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR SWITCH
BACK DOOR SWITCH
Diagnosis ProcedureINFOID:0000000003775811
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: December 20092009 QX56

CINCH LATCH MOTOR SYSTEMDLK-139
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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CINCH LATCH MOTOR SYSTEM
Diagnosis ProcedureINFOID:0000000003775812
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: December 20092009 QX56

DLK-140
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INTELLIGENT KEY UNIT POWER BACK DOOR INPUT SIGNAL
INTELLIGENT KEY UNIT POWER BACK DOOR INPUT SIGNAL
DescriptionINFOID:0000000003775813
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:0000000003775814
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-138, "
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: December 20092009 QX56

INTELLIGENT KEY UNIT POWER BACK DOOR OUTPUT SIGNAL
DLK-141
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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INTELLIGENT KEY UNIT POWE R BACK DOOR OUTPUT SIGNAL
DescriptionINFOID:0000000003775815
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:0000000003775816
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: December 20092009 QX56