2008 INFINITI QX56 battery

INTELLIGENT KEY BATTERY AND FUNCTIONDLK-103
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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2. Insert a flat-blade screwdriver (A) wrapped with a cloth into the slit of the corner and twist it to separate the upper part from the
lower part.
CAUTION:
• Do not touch the circuit board or battery terminal.
• The keyfob is water-resistant. However, if it does get wet,immediately wipe it dry.
3. Replace the battery with new one.
4. Align the tips of the upper and lower parts, and then push them together until it is securely closed.
CAUTION:
• When replacing battery, keep dirt, grease, and other for-eign materials off the electrode contact area.
5. After replacing the battery, check that all Intelligent Key func- tions work properly.
Is the inspection result normal?
YES >> Intelligent Key is OK.
NO >> Check remote keyless entry receiver. Refer to DLK-99,
"ComponentFunctionCheck".
Special Repair RequirementINFOID:0000000001539013
Refer to CONSULT-III Operation Manual.
PIIB6221E
PIIB6222E
Revision: March 2010 2008 QX56

DLK-104
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
HORN FUNCTION
HORN FUNCTION
DescriptionINFOID:0000000001539014
Perform answer-back for each operation with horn.
Component Function CheckINFOID:0000000001539015
1.CHECK FUNCTION
1. Select "HORN" in “ACTIVE TEST” mode with CONSULT-III.
2. Check the horn (high/low) operation.
Is the operation normal?
YES >> Inspection End.
NO >> Go to DLK-104, "
DiagnosisProcedure".
Diagnosis ProcedureINFOID:0000000001539016
1.CHECK HORN FUNCTION
Check horn function with horn switch
Do the horns sound?
YES >> GO TO 2
NO >> Go to HRN-4, "
Wiring Diagram".
2.CHECK HORN RELAY POWER SUPPLY
1. Turn ignition switch ON.
2. Perform “ACTIVE TEST”, "HORN" with CONSULT-Ill.
3. Using an oscilloscope or analog voltmeter, check voltage between horn relay harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> GO TO 3
3.CHECK HORN RELAY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R and horn relay connector.
Test item Description
HORN ON Horn relay ON (for 20 ms)
ALKIA0658ZZ
Horn relay
Ground Test item Voltage (V)
(Approx.)
Connector Terminal
H-1 1 Ground HORN ON
Battery voltage → 0 → Battery voltage
Other than above Battery voltage
Revision: March 2010 2008 QX56

KEY SWITCH (INTELLIGENT KEY UNIT INPUT)
DLK-109
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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KEY SWITCH (INTELLIGENT KEY UNIT INPUT)
Diagnosis ProcedureINFOID:0000000001539026
1.CHECK KEY SWITCH
With CONSULT-III
Check key switch (“KEY SW”) in “DATA MONITOR” mode with CONSULT-III.
Without CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit harness connector.
3. Check voltage between Intelligent Key unit harness connector M70 terminal 7 and ground.
Is the inspection result normal?
YES >> Key switch is OK.
NO >> GO TO 2
2.CHECK KEY SWITCH POWER SUPPLY CIRCUIT
1. Remove mechanical key from ignition switch.
2. Disconnect key switch and i gnition knob switch connector.
3. Check voltage between key switch and ignition knob switch harness connector M12 terminal 3 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace key switch and ignition knob switch power supply circuit.
3.CHECK KEY SWITCH OPERATION
Monitor item Condition
KEY SW Insert mechanical key into ignition switch: ON
Remove mechanical key from ignition switch: OFF
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (–)
M70 7 Ground Insert mechanical key
into ignition switch
Battery voltage
Remove mechanical
key from ignition switch 0
WIIA1173E
3 - Ground
: Battery voltage
PIIB4254E
Revision: March 2010 2008 QX56

KEY SWITCH (BCM INPUT)DLK-111
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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KEY SWITCH (BCM INPUT)
Diagnosis ProcedureINFOID:0000000001539027
1.CHECK KEY SWITCH POWER SUPPLY CIRCUIT
1. Remove mechanical key from ignition switch.
2. Disconnect key switch and i gnition knob switch connector.
3. Check voltage between key switch and ignition knob switch har- ness connector M12 terminal 3 and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Check harness between key switch and ignition knob switch and fuse.
2.CHECK KEY SWITCH
Check continuity between key switch and ignition knob switch termi-
nals 3 and 4.
Is the inspection result normal?
YES >> GO TO 3
NO >> Replace key cylinder assembly (built-in key switch).
3.CHECK KEY SWITCH SIGNAL CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM harness connector M18 terminal 37 and key switch and ignition knob switch harness connector
M12 terminal 4.
3. Check continuity between BCM harness connector M18 terminal 37 and ground.
Is the inspection result normal?
YES >> Key switch (BCM input) circuit is OK.
NO >> Repair or replace harness between key switch and ignition knob switch and BCM. 3 – Ground
: Battery voltage.
PIIB4254E
Component Terminals ConditionContinuity
Ignition switch 34 Insert mechanical key
into ignition switch.
Ye s
Remove mechanical key
from ignition switch. No
PIIA6140E
37 – 4
: Continuity should exist.
37 – Ground : Continuity should not exist.
PIIB4256E
Revision: March 2010 2008 QX56

DLK-112
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
IGNITION KNOB SWITCH
IGNITION KNOB SWITCH
Ignition Knob
Switch CheckINFOID:0000000001539028
1.CHECK IGNITION KNOB SWITCH
With CONSULT-III
Display “PUSH SW” on DATA MONITOR screen, and check if ON/OFF display is linked to ignition switch oper-
ation.
Without CONSULT-III
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit connector.
3. Check voltage between Intelligent Key unit harness connector M70 terminal 27 and ground.
Is the inspection result normal?
YES >> Ignition knob switch is OK.
NO >> GO TO 2
2.CHECK IGNITION KNOB SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect key switch and ignition knob switch connector.
3. Check voltage between key switch and ignition knob switch harness connector M12 terminal 1 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace key switch and ignition knob switch power supply circuit.
3.CHECK IGNITION KNOB SWITCH OPERATION
Check continuity between key switch and ignition knob switch terminals 1 and 2.
Monitor item Condition
PUSH SW Ignition switch is pushed: ON
Ignition switch is released: OFF
ConnectorTe r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (–)
M70 27 Ground Ignition switch is
pushed
Battery voltage
Ignition switch is re-
leased 0
WIIA1175E
1 - Ground
: Battery voltage
PIIB4257E
Revision: March 2010 2008 QX56

POWER LIFTGATE SWITCH FUNCTIONDLK-121
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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POWER LIFTGATE SWITCH FUNCTION
Diagnosis ProcedureINFOID:0000000001539034
1.POWER LIFTGATE SWITCH FUNCTION INSPECTION
Check power liftgate switch using switch operation.
Did the back door respond correctly?
YES >> Power liftgate switch is OK.
NO >> GO TO 2
2.POWER LIFTGATE SWITCH SIGNAL INSPECTION
1. Turn ignition switch OFF.
2. While operating the power liftgate switch, check voltage between back door control unit connector B55 terminal 23 and
ground.
Is the inspection result normal?
YES >> Switch is OK.
NO >> GO TO 3
3.POWER LIFTGATE SWITCH CIRCUIT INSPECTION
1. Disconnect back door control unit and power liftgate switch connectors.
2. Check continuity between back door control unit connector (A) B55 terminal 23 and power liftgate switch connector (B) M92 ter-
minal 1.
3. Check continuity between back door control unit connector (A) B55 terminal 23 and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> Repair the harness between the power liftgate switch and the back door control unit.
4.POWER LIFTGATE SWITCH GROUND INSPECTION
Check continuity between power liftgate switch connector terminal 2
and ground.
Is the inspection result normal?
YES >> GO TO 5
NO >> Repair the harness between the power liftgate switch and ground.
5.POWER LIFTGATE SWITCH POWER SUPPLY CIRCUIT INSPECTION
1. Reconnect back door control unit.
2. Ensure liftgate is closed.
Te r m i n a l Measuring condition Voltage (V)
(Approx.)
(+) (-)
23 GroundPower liftgate
switch ON
0
OFF Battery voltage
LIIA0802E
23 - 1 : Continuity should exist.
23 - Ground : Continuity should not exist.
ALKIA0670ZZ
2 - Ground : Continuity should exist.
LIIA1065E
Revision: March 2010 2008 QX56

DLK-122
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
POWER LIFTGATE SWITCH FUNCTION
3. Check voltage between power liftgate switch connector M92 ter-
minal 1 and ground.
Is the inspection result normal?
YES >> Replace the power liftgate switch.
NO >> Replace the back door control unit. 1 - Ground
:Approx. battery voltage
LIIA1063E
Revision: March 2010 2008 QX56

GLASS HATCH AJAR SWITCHDLK-125
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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GLASS HATCH AJAR SWITCH
Diagnosis ProcedureINFOID:0000000001539035
1.CHECK GLASS HATCH AJAR SWITCH INPUT SIGNALWith CONSULT-III
Check glass hatch ajar switch ("TRNK OPN MNTR") in DATA MONITOR mode with CONSULT–III.
• When glass hatch is open:
• When glass hatch is closed:
Without CONSULT-III
Check voltage between BCM connector M19 terminal 42 and ground.
Is the inspection result normal?
YES >> System is OK.
NO >> GO TO 2
2.CHECK GLASS HATCH AJAR SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect glass hatch ajar switch, BCM and back door control unit.
3. Check continuity between BCM connector (A) M19 te rminal 42 and glass hatch ajar switch connector (C)
D707 terminal 1.
4. Check continuity between back door control unit connector B55
(B) terminal 17 and glass hatch ajar switch connector (C) D707
terminal 1.
5. Check continuity between glass hatch ajar switch connector (C) D707 terminal 1 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3.CHECK GLASS HATCH AJAR SWITCH
1. Disconnect glass hatch ajar switch connector.
2. Check continuity between glass hatch ajar switch connector terminal 1 and ground. TRNK OPN MNTR : ON
TRNK OPN MNTR : OFF
Connector Item
Te r m i n a l s
ConditionVoltage (V)
(Approx.)
(+) (–)
M19 BCM 42 Ground Open
↓
Closed 0
↓
Battery voltage
LIIA1149E
42 - 1 : Continuity should exist.
17 - 1 : Continuity should exist.
1 - Ground : Continuity should not exist.
ALKIA0667ZZ
Revision: March 2010 2008 QX56