INFINITI QX56 2010 Factory Service Manual

INL-22
< COMPONENT DIAGNOSIS >
STEP LAMP CIRCUIT
STEP LAMP CIRCUIT
DescriptionINFOID:0000000005146733
Controls the front and rear step lamps and the foot lamps (ground side) to turn the lamps ON and OFF.
Component Function CheckINFOID:0000000005146734
CAUTION:
Before performing the diagnosis, check that the following is normal.
• Battery saver output/power supply
• Front step lamp bulbs
• Rear step lamp bulbs
• Foot lamp bulbs
1.CHECK STEP LAMP OPERATION
CONSULT-III
1. Turn ignition switch ON.
2. Select “STEP LAMP TEST” of BCM (INT LAMP) active test item.
3. While operating the test item, check that the front/rear step lamps and foot lamps turn ON/OFF.
Is the inspection result normal?
YES >> Step lamp circuit is normal.
NO >> Refer to INL-22, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005146735
Regarding Wiring Diagram information, refer to INL-28, "Wiring Diagram".
1.CHECK STEP LAMP OUTPUT
CONSULT-III
1. Turn ignition switch ON.
2. Select “STEP LAMP TEST” of BCM (INT LAMP) active test item.
3. While operating the test item, check voltage between BCM har- ness connector M20 terminal 62 and ground.
Is the inspection result normal?
YES >> Step lamp circuit is operating normally.
Fixed ON>>GO TO 3
Fixed OFF>>GO TO 2
2.CHECK STEP LAMP OPEN CIRCUIT ON : Step lamp ON
OFF : Step lamp OFF
Connector Terminal —
STEP LAMP
TEST Voltag e
M20 62 Ground ON
0V
OFF Battery voltage
ALLIA0414GB
Revision: April 20092010 QX56

STEP LAMP CIRCUITINL-23
< COMPONENT DIAGNOSIS >
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1. Turn ignition switch OFF.
2. Disconnect BCM connector M20, front step lamp, rear step lamp and foot lamp connectors.
3. Check continuity between BCM connector M20 (A) terminal 62 and step lamp connectors (B) and foot lamp connectors (C).
Is the inspection result normal?
YES >> Check step lamp or foot lamp for an open. If OK, replace BCM. Refer to BCS-59, "
Removal and Installation". If
NG, replace step lamp or foot lamp. Refer to INL-77,
"Removal and Installation".
NO >> Repair harness or connectors.
3.CHECK STEP LAMP SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector M20, front and rear step lamp con- nectors and foot lamp connectors.
3. Check continuity between BCM connector M20 terminal 62 and ground.
Is the inspection result normal?
YES >> Check step lamp or foot lamp for a short circuit. If OK, replace BCM. Refer to BCS-59, "
Removal and Installa-
tion". If NG, replace step lamp or foot lamp. Refer to INL-77, "Removal and Installation".
NO >> Repair the harness or connectors.
Connector Terminal ConnectorTerminal Continuity
M20 (A) 62 Front step lamp LH D11 (B) 2
Ye s
Front step lamp RH D109 (B) 2
Rear step lamp LH D206 (B) 2
Rear step lamp RH D306 (B) 2
Foot lamp LH M99 (C) 2
Foot lamp RH M100 (C) 2
ALLIA0415GB
Connector
Terminal —Continuity
M20 62Ground No
ALLIA0416GB
Revision: April 20092010 QX56

INL-24
< COMPONENT DIAGNOSIS >
CARGO LAMP CONTROL CIRCUIT
CARGO LAMP CONTROL CIRCUIT
DescriptionINFOID:0000000005146736
Controls the cargo lamp (ground side) to turn the cargo lamp ON and OFF.
Component Function CheckINFOID:0000000005146737
CAUTION:
Before performing the diagnosis, check that the following is normal.
• Battery saver output/power supply
• Cargo lamp bulb
1.CHECK CARGO LAMP OPERATION
CONSULT-III
1. Turn ignition switch ON.
2. Select “LUGGAGE LAMP TEST” of BCM (INT LAMP) active test item.
3. While operating the test item, che ck that cargo lamp turns ON/OFF.
Is the inspection result normal?
YES >> Cargo lamp circuit is normal.
NO >> Refer to INL-22, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005146738
Regarding Wiring Diagram information, refer to INL-28, "Wiring Diagram".
1.CHECK CARGO LAMP OUTPUT
CONSULT-III
1. Turn ignition switch ON.
2. Select “LUGGAGE LAMP TEST” of BCM (INT LAMP) active test
item.
3. While operating the test item, check voltage between BCM con-
nector M19 terminal 49 and ground.
Is the inspection result normal?
YES >> Cargo lamp control circuit is operating normally.
Fixed ON>>GO TO 3
Fixed OFF>>GO TO 2
2.CHECK CARGO LAMP OPEN CIRCUIT ON : Cargo lamp ON
OFF : Cargo lamp OFF
Connector Terminal —
LUGGAGE
LAMP TEST Voltag e
M19 49 Ground ON
0V
OFF Battery voltage
ALLIA0417GB
Revision: April 20092010 QX56

CARGO LAMP CONTROL CIRCUITINL-25
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1. Turn ignition switch OFF.
2. Disconnect BCM connector M19 and cargo lamp connector.
3. Check continuity between BCM connector M19 (A) terminal 49 and cargo lamp connector B153 (B) terminal 1.
Is the inspection result normal?
YES >> Check cargo lamp for an open. If OK, replace BCM.
Refer to BCS-59, "
Removal and Installation". If NG, replace cargo lamp. Refer to INL-81,
"Removal and Installation".
NO >> Repair harness or connectors.
3.CHECK CARGO LAMP SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector M19 and cargo lamp connector.
3. Check continuity between BCM connector M19 terminal 49 and ground.
Is the inspection result normal?
YES >> Check cargo lamp for a short circuit. If OK, replace BCM. Refer to BCS-59, "
Removal and Installation". If
NG, replace cargo lamp. Refer to INL-81, "
Removal and
Installation".
NO >> Repair harness or connectors.
BCM Cargo lamp
Continuity
Connector Terminal Connector Terminal
M19 (A) 49B153 (B) 1Yes
ALLIA0418GB
Connector Terminal —Continuity
M19 49Ground No
ALLIA0419GB
Revision: April 20092010 QX56

INL-26
< COMPONENT DIAGNOSIS >
IGNITION KEYHOLE ILLUMINATION CONTROL CIRCUIT
IGNITION KEYHOLE ILLUMINATION CONTROL CIRCUIT
DescriptionINFOID:0000000005146739
Controls the ignition keyhole illumination (ground side) to turn the ignition keyhole illumination ON and OFF.
Component Function CheckINFOID:0000000005146740
CAUTION:
Before performing the diagnosis, check that the following is normal.
• Battery saver output/power supply circuit
• Ignition keyhole illumination bulb
1.CHECK IGNITION KEYHOLE ILLUMINATION OPERATION
CONSULT-III
1. Turn the ignition switch ON.
2. Select “IGN ILLUM” of BCM (INT LAMP) active test item.
3. While operating the test item , check that the ignition keyhole illumination turns ON/OFF
Is the inspection result normal?
YES >> Ignition keyhole illumination circuit is normal.
NO >> Refer to INL-26, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005146741
Regarding Wiring Diagram information, refer to INL-28, "Wiring Diagram".
1.CHECK IGNITION KEYHOLE OUTPUT
CONSULT-III
1. Turn ignition switch ON.
2. Select “IGN ILLUM” of BCM (INT LAMP) active test item.
3. While operating the test item, check voltage between BCM con- nector M18 terminal 1 and ground.
Is the inspection result normal?
YES >> Ignition keyhole illumination control circuit is operating normally.
Fixed ON>>GO TO 3
Fixed OFF>>GO TO 2
2.CHECK IGNITION KEYHOLE ILLUMINATION OPEN CIRCUIT ON : Ignition keyhole illumination ON
OFF : Ignition keyhole illumination OFF
Connector Terminal — IGN ILLUM Voltage
M18 1 Ground ON
0V
OFF Battery voltage
ALLIA0420GB
Revision: April 20092010 QX56

IGNITION KEYHOLE ILLUMINATION CONTROL CIRCUIT
INL-27
< COMPONENT DIAGNOSIS >
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1. Turn ignition switch OFF.
2. Disconnect BCM connector M18 and ignition keyhole illumina- tion connector.
3. Check continuity between BCM connector M18 (A) terminal 1 and ignition keyhole illumination connector M150 (B) terminal 2.
Is the inspection result normal?
YES >> Check ignition keyhole illumination fo r an open. If OK, replace BCM. Refer to BCS-59, "Removal
and Installation". If NG, replace ignition keyhole illumination.
NO >> Repair harness or connectors.
3.CHECK IGNITION KEYHOLE ILLUMINATION SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector M18 and ignition keyhole illumina- tion connector.
3. Check continuity between BCM connector M18 terminal 1 and ground.
Is the inspection result normal?
YES >> Check ignition keyhole illumi nation for a short circuit. If
OK, replace BCM. Refer to BCS-59, "
Removal and
Installation". If NG, replace ignition keyhole illumination.
NO >> Repair harness or connectors.
BCM Ignition keyhole illumination
Continuity
Connector Terminal Connector Terminal
M18 (A) 1 M150 (B) 2 Yes
ALLIA0421GB
Connector Terminal—Continuity
M18 1Ground No
ALLIA0422GB
Revision: April 20092010 QX56

INL-28
< COMPONENT DIAGNOSIS >
INTERIOR ROOM LAMP CONTROL SYSTEM
INTERIOR ROOM LAMP CONTROL SYSTEM
Wiring DiagramINFOID:0000000005146742
ABLWA0425GB
Revision: April 20092010 QX56

INTERIOR ROOM LAMP CONTROL SYSTEMINL-29
< COMPONENT DIAGNOSIS >
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ABLWA0426GB
Revision: April 20092010 QX56

INL-30
< COMPONENT DIAGNOSIS >
INTERIOR ROOM LAMP CONTROL SYSTEM
ABLWA0427GB
Revision: April 20092010 QX56

INTERIOR ROOM LAMP CONTROL SYSTEMINL-31
< COMPONENT DIAGNOSIS >
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ABLIA0136GB
Revision: April 20092010 QX56