2008 INFINITI QX56 key battery

DLK-64
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
INTELLIGENT KEY UNIT
INTELLIGENT KEY UNIT
: Diagnosis ProcedureINFOID:0000000001538958
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit connector.
3. Check voltage between Intelligent Key unit harness connector M70 terminals 6, 11 and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair or replace Intelligent Key unit power supply circuit.
2.CHECK GROUND CIRCUIT
Check continuity between Intelligent Key unit harness connector
M70 terminal 12 and ground.
Is the inspection result normal?
YES >> Power supply and ground circuits are OK.
NO >> Repair or replace the Intelligent Key unit ground circuit.
BCM (BODY CONTROL MODULE)
BCM (BODY CONTROL MODULE) : Diagnosis ProcedureINFOID:0000000004884061
1. CHECK FUSES AND FUSIBLE LINK
Check that the following fuses and fusible link are not blown.
Is the fuse blown?
YES >> Replace the blown fuse or fusible link after repairing the affected circuit.
NO >> GO TO 2
2. CHECK POWER SUPPLY CIRCUIT
Connector Terminals Ignition switch position
M70 (+) (–) OFF
ON
6 Ground 0V Battery voltage
11 Battery voltage Battery voltage
WIIA1171E
12 - Ground : Continuity should exist.
WIIA1172E
Terminal No. Signal nameFuses and fusible link No.
57 Battery power supply 22 (15A)
70 F (50A)
11 Ignition ACC or ON 4 (10A)
38 Ignition ON or START 59 (10A)
Revision: March 2010 2008 QX56

POWER SUPPLY AND GROUND CIRCUITDLK-65
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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DLK
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1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check voltage between BCM harness connector and ground.
Is the measurement value normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
Does continuity exist?
YES >> INSPECTION END
NO >> Repair or replace harness.
BACK DOOR
BACK DOOR : Diagnosis ProcedureINFOID:0000000001538960
1.BACK DOOR POWER SUPPLY CIRCUIT INSPECTION
1. Turn ignition switch OFF.
2. Disconnect back door control unit connector.
3. Check voltage between back door control unit connector B55 terminals 3, 7, 10 and ground.
Connector Te r m i n a l s
Power
source Condition Voltage (V) (Ap-
prox.)
(+) (-)
M18 11 Ground
ACC
power
supply Ignition
switch
ACC or
ON Battery voltage
38 Ground Ignition
power
supply Ignition
switch ON or START Battery voltage
M20 57 Ground
Battery
power
supply Ignition
switch OFF Battery voltage
70 Ground Battery
power
supply Ignition
switch
OFF Battery voltage
LIIA2415E
BCM
GroundContinuity
Connector Terminal
M20 67 Yes
LIIA0915E
ConnectorTe r m i n a l s
Power
source Condition
Voltage (V) (Ap-
prox.)
(+) (-)
B55 3Ground
Battery
power
supply Ignition
switch OFF Battery voltage
7Ground Ignition
power
supply Ignition
switch ON
or START Battery voltage
10 Ground Battery
power
supply Ignition
switch OFF Battery voltage
ALKIA1604ZZ
Revision: March 2010
2008 QX56

DLK-68
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DOOR SWITCH
Is the inspection result normal?
YES >> Door switch circuit is OK.
NO >> GO TO 2
2.CHECK DOOR SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door switch and BCM.
3. Check continuity between BCM connector (A) M18, M19 terminals 12, 13, 43, 47, 48 and door switch con-
nector (B) B8 (Front LH), B108 (Front RH), B18 (Rear LH), B116 (Rear RH) terminal 2 or back door latch
connector (C) D503 terminal 7.
4. Check continuity between door switch connector (B) B8 (Front
LH), B108 (Front RH), B18 (Rear LH), B116 (Rear RH) terminal
2 or back door latch connector (C) D503 terminal 7 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3.CHECK DOOR SWITCHES
• Disconnect door switch harness.
• Check continuity between door switch connector terminals.
Connec- tor Item Te r m i n a l s
ConditionVoltage (V)
(Approx.)
( + ) ( – )
M19 Back door
switch/latch 43
Ground Open
↓
Closed 0
↓
Battery voltage
Front door
switch LH 47
Rear door switch LH 48
M18 Front door
switch RH 12
Rear door
switch RH 13
LIIA1041E
2 - 47
:Continuity should exist
2 - 12 :Continuity should exist
2 - 48 :Continuity should exist
2 - 13 :Continuity should exist
7 - 43 :Continuity should exist
2 - Ground :Continuity should not exist
7 - Ground :Continuity should not exist
ALKIA0689ZZ
Revision: March 2010 2008 QX56

DOOR REQUEST SWITCHDLK-79
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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DOOR REQUEST SWITCH
DescriptionINFOID:0000000001538977
Transmits lock/unlock operation to Intelligent Key unit.
Component Function CheckINFOID:0000000001538978
1.CHECK FUNCTION
With CONSULT-III
Check door request switch "DR REQ SW" and "AS REQ SW" in DATA MONITOR mode.
Is the inspection result normal?
YES >> Door request switch is OK.
NO >> Refer to DLK-79, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001538979
1.CHECK FRONT DOOR REQUEST SWITCH
With CONSULT-III
Check front door request switch (“DR REQ SW” or “AS REQ SW”) in “DATA MONITOR” mode.
Without CONSULT-III
1. Turn ignition switch OFF.
2. Check voltage between Intelligent Key unit harness connector M70 terminals 5, 25 and ground.
Is the inspection result normal?
YES >> Front door request switch is OK.
NO >> GO TO 2
2.CHECK FRONT DOOR REQUEST SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit and front door request switch connectors.
3. Check continuity between Intelligent Key unit harness connector (A) M70 terminals 5 (driver door), 25 (passenger door) and front door request switch harness connector (B) D16 (LH), D116 (RH) terminal 1.
Monitor item Condition
DR REQ SW
AS REQ SW Door request switch is pressed : ON
Door request switch is released : OFF
Monitor item Condition
DR REQ SW
AS REQ SW Front door request switch is pressed: ON
Front door request switch is released: OFF
Connector Item
Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (–)
M70 Front door re-
quest switch
LH
5
Ground Door request
switch is
pressed ↓
Door request switch is re-
leased 0
↓
Battery voltage
Front door re-
quest switch
RH 25
WIIA1183E
Revision: March 2010
2008 QX56

DLK-80
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DOOR REQUEST SWITCH
4. Check continuity between Inte
lligent Key unit harness connector
(A) M70 terminals 5 (driver door), 25 (passenger door) and
ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness between Intelligent Key unit and front door request switch.
3.CHECK FRONT DOOR REQUEST SWITCH GROUND CIRCUIT
Check continuity between front door request switch harness connector D16 (driver door), D116 (passenger
door) terminal 2 and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair or replace door request switch ground circuit.
4.CHECK FRONT DOOR REQUEST SWITCH OPERATION
Refer to DLK-80, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 5
NO >> Replace front door request switch.
5.CHECK FRONT DOOR REQUEST SWITCH SIGNAL
1. Connect Intelligent Key unit connector.
2. Check voltage between Intelligent Key unit harness connector M70 terminals 5, 25 and ground.
Is the inspection result normal?
YES >> Refer to GI-38, "Intermittent Incident".
NO >> Replace Intelligent Key unit. Refer to SEC-116, "
Removal and Installation".
Component InspectionINFOID:0000000001538980
1.CHECK FRONT DOOR REQUEST SWITCH OPERATION
1. Turn ignition switch OFF. Driver side 5 - 1 : Continuity should exist.
Passenger side 25 - 1 : Continuity should exist.
5 - Ground
: Continuity should not exist.
25 - Ground : Continuity should not exist.
PIIB6614E
2 - Ground : Continuity should exist.
PIIB6616E
Connector Item Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (–)
M70 Front door re-
quest switch
LH
5
Ground Door request
switch is pressed
↓
Door request switch is re- leased 0
↓
Battery voltage
Front door re-
quest switch
RH 25
WIIA1183E
Revision: March 2010
2008 QX56

DLK-82
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DOOR LOCK ACTUATOR
DOOR LOCK ACTUATOR
DRIVER SIDE
DRIVER SIDE : DescriptionINFOID:0000000001538981
Locks/unlocks the door with the signal from BCM.
DRIVER SIDE : Component Function CheckINFOID:0000000001538982
1.CHECK FUNCTION
1. Use CONSULT-III to perform Active Test "DOOR LOCK".
2. Touch “ALL LOCK” or “ALL UNLOCK” to check that it works normally.
Is the inspection result normal?
YES >> Door lock actuator is OK.
NO >> Refer to DLK-82, "
DRIVER SIDE : Diagnosis Procedure".
DRIVER SIDE : Diagnosis ProcedureINFOID:0000000001538983
1.CHECK DOOR LOCK ACTUATOR SIGNAL
1. Turn ignition switch OFF.
2. Check voltage between BCM connector M20 terminals 59, 65 and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> GO TO 3
2.CHECK DOOR LOCK ACTUATOR HARNESS
1. Disconnect BCM and front door lock assembly LH (actuator).
2. Check continuity between BCM connector (A) M20 terminals 59, 65 and front door lock assembly LH (actuator) connector (B)
D14 terminals 2, 3.
Is the inspection result normal?
YES >> Replace front door lock assembly LH (actuator).
NO >> Repair or replace harness.
3.CHECK DOOR LOCK ACTUATOR HARNESS
1. Disconnect BCM and front door lock assembly LH (actuator).
Connector Te r m i n a l s
Condition Voltage (V)
(Approx.)
(+) (-)
M20 59
Ground Driver door lock/unlock
switch is turned to UN-
LOCK
0
→ Battery voltage
65 Driver door lock/unlock
switch is turned to LOCK
0
→ Battery voltage
LIIA1046E
Connector Terminals Connector Terminals Continuity
M20 59
D14 2Y
es
65 3Yes
ALKIA0632ZZ
Revision: March 2010 2008 QX56

DOOR LOCK ACTUATORDLK-83
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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2. Check continuity between BCM connector M20 terminals 59, 65 and ground.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-55, "Removal and Installation".
NO >> Repair or replace harness.
PASSENGER SIDE
PASSENGER SIDE : DescriptionINFOID:0000000001538984
Locks/unlocks the door with the signal from BCM.
PASSENGER SIDE : Co mponent Function CheckINFOID:0000000001538985
1.CHECK FUNCTION
1. Use CONSULT-III to perform Active Test DOOR LOCK.
2. Touch “ALL LOCK” or “ALL UNLOCK” to check that it works normally.
Is the inspection result normal?
YES >> Door lock actuator is OK.
NO >> Refer to DLK-83, "
PASSENGER SIDE : Diagnosis Procedure".
PASSENGER SIDE : Dia gnosis ProcedureINFOID:0000000001538986
1.CHECK FRONT DOOR LOCK ACTUATOR RH SIGNAL
1. Turn ignition switch OFF.
2. Check voltage between BCM connector M20 terminals 65, 66 and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> GO TO 3
2.CHECK DOOR LOCK ACTUATOR HARNESS
1. Disconnect BCM and front door lock actuator RH.
Connector Terminals Continuity
M20 59
Ground No
65 No
ALKIA0633ZZ
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
M20 65
Ground Door lock/unlock switch is
turned to LOCK
0
→ Battery voltage
for 300 ms
66 Door lock/unlock switch is
turned to UNLOCK 0
→ Battery voltage
for 300 ms
LIIA1048E
Revision: March 2010 2008 QX56

DOOR LOCK ACTUATORDLK-85
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
C
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G H
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M A
B
DLK
N
O P
2. Check voltage between BCM connector M20 terminals 65, 66 and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> GO TO 3
2.CHECK DOOR LOCK ACTUATOR HARNESS
1. Disconnect BCM and rear door lock actuator LH.
2. Check continuity between BCM connector (A) M20 terminals 65, 66 and rear door lock actuator LH connector (B) D205 terminals
2, 3.
Is the inspection result normal?
YES >> Replace rear door lock actuator LH.
NO >> Repair or replace harness or passenger select unlock relay.
3.CHECK DOOR LOCK ACTUATOR HARNESS
1. Disconnect BCM and each door lock actuator.
2. Check continuity between BCM connector M20 terminals 65, 66 and ground.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-55, "Removal and Installation".
NO >> Repair or replace harness or passenger select unlock relay.
REAR RH
REAR RH : DescriptionINFOID:0000000001538990
Locks/unlocks the door with the signal from BCM.
Connector Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (-)
M20 65
Ground Door lock/unlock switch
is turned to LOCK
0
→ Battery voltage
for 300 ms
66 Door lock/unlock switch
is turned to UNLOCK 0
→ Battery voltage
for 300 ms
LIIA1048E
Terminals Continuity
65 3 Yes
66 2 Yes
ALKIA0629ZZ
Terminals Continuity
65 Ground No
66 No
ALKIA0631ZZ
Revision: March 2010 2008 QX56