INFINITI QX56 2010 Factory Service Manual

HEADLAMP (LO) CIRCUITEXL-35
< COMPONENT DIAGNOSIS >
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Is the fuse open?
YES >> Repair the harness and replace the fuse.
NO >> GO TO 2.
2.CHECK HEADLAMP (LO) OUTPUT VOLTAGE
1. Turn the ignition switch OFF.
2. Disconnect the front combination lamp connector.
3. Turn the ignition switch ON.
4. Turn the low beam headlamps ON.
5. With the low beam headlamps ON, check the voltage between the combination lamp connector and ground.
Is voltage reading as specified?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK HEADLAMP (LO) CIRCUIT FOR OPEN
1. Turn the ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between the IPDM E/R harness connector and the front combination lamp harness connector.
Does continuity exist?
YES >> GO TO 4.
NO >> Repair the harnesses or connectors.
4.CHECK FRONT COMBINATION LAMP (LO) GROUND CIRCUIT
Check continuity between the front combination lamp harness con-
nector terminal and ground.
Does continuity exist?
YES >> Inspect the headlamp bulb.
NO - RH>>Repair the harness.
NO - LH>>Inspect the daytime light relay. If OK, repair harness. If
NG, replace the daytime light relay.
Unit LocationFuse No.Capacity
Headlamp LO (LH) IPDM E/R4015A
Headlamp LO (RH) IPDM E/R4115A
(+)
(−)Voltage
Connector Terminal
LH E6 5
Ground Battery voltage
RH E108 5
ALLIA0855ZZ
AB
Continuity
Connector Terminal Connector Terminal
LH E123 52
E6 5
Ye s
RH 54E108 5
AWLIA1372ZZ
Connector Terminal —Continuity
LH E6 1
Ground Yes
RH E108 1
ALLIA0856ZZ
Revision: April 20092010 QX56

EXL-36
< COMPONENT DIAGNOSIS >
FRONT FOG LAMP CIRCUIT
FRONT FOG LAMP CIRCUIT
DescriptionINFOID:0000000005146647
The IPDM E/R (intelligent power distribution module engine room) controls the front fog lamp relay based on
inputs from the BCM via the CAN communication lines. When the front fog lamp relay is energized, power
flows from the front fog lamp relay in the IPDM E/R to the front fog lamps.
Component Function CheckINFOID:0000000005146648
1.CHECK FRONT FOG LAMP OPERATION
WITHOUT CONSULT-III
1. Activate IPDM E/R auto active test. Refer to PCS-12, "
Diagnosis Description".
2. Check that the front fog lamp is turned ON.
CONSULT-III
1. Select "EXTERNAL LAMPS" of IPDM E/R active test item.
2. With operating the test items, Check that the front fog lamp is turned ON.
Is the front fog lamp turned ON?
YES >> Front fog lamp circuit is normal.
NO >> Refer to EXL-36, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005146649
Regarding Wiring Diagram information, refer to EXL-73, "Wiring Diagram".
1.CHECK FRONT FOG LAMP FUSE
1. Turn the ignition switch OFF.
2. Check that the following fuses are not open.
Is the fuse open?
YES >> Repair the harness and replace the fuse.
NO >> GO TO 2.
2.CHECK FRONT FOG LAMP OUTPUT VOLTAGE
1. Turn the ignition switch OFF.
2. Disconnect the front fog/turn lamp connector.
3. Turn the ignition switch ON.
4. Turn the front fog lamps ON.
5. Check the voltage between the fog/turn lamp connector and ground.
Are the voltage readings as specified?
YES >> GO TO 4.
NO >> GO TO 3. Fog : Front fog lamp ON
Off : Front fog lamp OFF
Unit
LocationFuse No.Capacity
Front fog lamp IPDM E/R5620A
(+)
(−)V olt a g e
Connector Terminal
LH E101 1
Ground Battery voltage
RH E102 1
ALLIA0719GB
Revision: April 20092010 QX56

FRONT FOG LAMP CIRCUITEXL-37
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3.CHECK FRONT FOG LAMP OPEN CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between the IPDM E/R harness connector and the front fog/turn lamp harness connector.
Does continuity exist?
YES >> GO TO 4.
NO >> Repair the harnesses or connectors.
4.CHECK FRONT FOG LAMP GROUND CIRCUIT
1. Disconnect the front fog lamp connector.
2. Check continuity between the front fog/turn lamp harness con- nector terminal and ground.
Does continuity exist?
YES >> Inspect the fog lamp bulb.
NO >> Repair the harness.
AB Continuity
Connector Terminal Connector Terminal
LH E123 50
E101 1
Ye s
RH 51E102 1
ALLIA0720GB
Connector Terminal —Continuity
LH E101 3
Ground Yes
RH E102 3
ALLIA0721GB
Revision: April 20092010 QX56

EXL-38
< COMPONENT DIAGNOSIS >
PARKING LAMP CIRCUIT
PARKING LAMP CIRCUIT
DescriptionINFOID:0000000005146650
The IPDM E/R (intelligent power distribution module engine room) controls the tail lamp relay based on inputs
from the BCM via the CAN communication lines. When the tail lamp relay is energized, power flows through
fuse 37, located in the IPDM E/R. Power then flows to the front and rear combination lamps.
Component Function CheckINFOID:0000000005146651
1.CHECK PARKING LAMP OPERATION
WITHOUT CONSULT-III
1. Activate IPDM E/R auto active test. Refer to PCS-12, "
Diagnosis Description".
2. Check that the parking lamp is turned ON.
CONSULT-III
1. Select "EXTERNAL LAMPS" of IPDM E/R active test item.
2. With operating the test items, check that the parking lamp is turned ON.
Is the parking lamp turned ON?
YES >> Parking lamp circuit is normal.
NO >> Refer to EXL-38, "
Diagnosis Procedure - Without Daytime Light System", EXL-41, "Diagnosis
Procedure - With Daytime Light System".
Diagnosis Procedure - Wit hout Daytime Light SystemINFOID:0000000005146652
Regarding Wiring Diagram information, refer to EXL-84, "Wiring Diagram".
1.CHECK PARKING LAMP FUSES
1. Turn the ignition switch OFF.
2. Check that the following fuses are not open.
Is the fuse open?
YES >> Repair the harness and replace the fuse.
NO >> GO TO 2.
2.CHECK TAIL LAMP RELAY OUTPUT (VOLTAGE)
1. Turn the ignition switch OFF.
2. Disconnect the front combination lamp connector, rear combination lamp connector and license plate
lamp connector.
3. Turn the ignition switch ON.
4. Turn the parking lamps ON. TAIL : Parking lamp ON
Off : Parking lamp OFF
Unit
LocationFuse No.Capacity
Parking lamps IPDM E/R3710A
Revision: April 20092010 QX56

PARKING LAMP CIRCUITEXL-39
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5. With the parking lamps ON, check voltage between the front combination lamp connectors and ground.
6. With the parking lamps ON, check voltage between the rear combination lamp connectors and ground.
7. With the parking lamps ON, check voltage between the license plate lamp connector and ground
Are voltage readings as specified?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK PARKING, LICENSE PLATE AND TAIL LAMP CIRCUIT (OPEN)
1. Turn the ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between the IPDM E/R harness connector (A) and the front combination lamp harness connector (B).
(+) (−)V olt a g e
Connector Terminal
LH E11 3Ground Battery voltage
RH E107
ALLIA0857ZZ
(+) (−)V olt a g e
Connector Terminal
LH B70 3Ground Battery voltage
RH B130
AWLIA1622ZZ
(+) (−) Voltage
Connector Terminal
D703 1 Ground Battery voltage
WKIA4613E
AB Continuity
Connector Terminal Connector Terminal
LH E124 57 E11
3Yes
RH E107
AWLIA1373ZZ
Revision: April 20092010 QX56

EXL-40
< COMPONENT DIAGNOSIS >
PARKING LAMP CIRCUIT
4. Check continuity between the IPDM E/R harness connector (A)and the rear combination lamp harness connector (B).
5. Check continuity between the IPDM E/R harness connector (A) and license plate lamp connector (B).
Are continuity test results as specified?
YES >> GO TO 4.
NO >> Repair the harnesses or connectors.
4.CHECK PARKING, LICENSE A ND TAIL LAMP GROUND CIRCUITS
1. Check continuity between the front combination lamp harness connectors E11 and E107 terminal 4 and ground.
2. Check continuity between the rear combination lamp harness connectors B70 and B130 terminal 1 and ground.
AB Continuity
Connector Terminal Connector Terminal
LH E124 57 B70
3Yes
RH B130
AWLIA1623ZZ
AB
Continuity
Connector Terminal Connector Terminal
E124 57D703 1Yes
WKIA4614E
Connector Terminal —Continuity
LH E11 4Ground Yes
RH E107
AWLIA1619ZZ
Connector Terminal —Continuity
LH B70 1Ground Yes
RH B130
AWLIA1624ZZ
Revision: April 20092010 QX56

PARKING LAMP CIRCUITEXL-41
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3. Check continuity between the license plate lamp harness con- nectors and ground.
Does continuity exist?
YES >> Inspect the parking lamp bulb.
NO >> Repair the harness.
Diagnosis Procedure - With Daytime Light SystemINFOID:0000000005146653
Regarding Wiring Diagram information, refer to EXL-84, "Wiring Diagram".
1.CHECK PARKING LAMP FUSES
1. Turn the ignition switch OFF.
2. Check that the following fuses are not open.
Is the fuse open?
YES >> Repair the harness and replace the fuse.
NO >> GO TO 2.
2.CHECK TAIL LAMP RELAY OUTPUT (VOLTAGE)
1. Turn the ignition switch OFF.
2. Disconnect the front combination lamp connector, rear combination lamp connector and license plate
lamp connector.
3. Turn the ignition switch ON.
4. Turn the parking lamps ON.
5. With the parking lamps ON, check voltage between the front combination lamp connectors and ground.
6. With the parking lamps ON, check voltage between the rear combination lamp connectors and ground.
Connector Terminal —Continuity
D703 2Ground Yes
WKIA4615E
Unit LocationFuse No.Capacity
Parking lamps IPDM E/R3710A
(+)
(−)V olt a g e
Connector Terminal
LH E6 3Ground Battery voltage
RH E108
ALLIA0857ZZ
(+) (−)V olt a g e
Connector Terminal
LH B70 3Ground Battery voltage
RH B130
AWLIA1622ZZ
Revision: April 20092010 QX56

EXL-42
< COMPONENT DIAGNOSIS >
PARKING LAMP CIRCUIT
7. With the parking lamps ON, check voltage between the licenseplate lamp connector and ground
Are voltage readings as specified?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK PARKING, LICENSE PLATE AND TAIL LAMP CIRCUIT (OPEN)
1. Turn the ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between the IPDM E/R harness connector (A) and the front combination lamp harness connector (B).
4. Check continuity between the IPDM E/R harness connector (A) and the rear combination lamp harness connector (B).
5. Check continuity between the IPDM E/R harness connector (A) and license plate lamp connector (B).
Are continuity test results as specified?
YES >> GO TO 4.
NO >> Repair the harnesses or connectors.
4.CHECK PARKING, LICENSE A ND TAIL LAMP GROUND CIRCUITS
(+)
(−)Voltage
Connector Terminal
D703 1 Ground Battery voltage
WKIA4613E
AB Continuity
Connector Terminal Connector Terminal
LH E124 57 E6
3Y es
RH E108
AWLIA1373ZZ
AB
Continuity
Connector Terminal Connector Terminal
LH E124 57 B70
3Yes
RH B130
AWLIA1623ZZ
AB
Continuity
Connector Terminal Connector Terminal
E124 57D703 1Yes
WKIA4614E
Revision: April 20092010 QX56

PARKING LAMP CIRCUITEXL-43
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1. Check continuity between the front combination lamp harness connectors E6 and E108 terminal 4 and ground.
2. Check continuity between the rear combination lamp harness connectors B70 and B130 terminal 1 and ground.
3. Check continuity between the license plate lamp harness con- nectors and ground.
Does continuity exist?
YES >> Inspect the parking lamp bulb.
NO >> Repair the harness.
Connector Terminal —Continuity
LH E6 4Ground Yes
RH E108
AWLIA1619ZZ
Connector Terminal —Continuity
LH B70 1Ground Yes
RH B130
AWLIA1624ZZ
Connector Terminal —Continuity
D703 2Ground Yes
WKIA4615E
Revision: April 20092010 QX56

EXL-44
< COMPONENT DIAGNOSIS >
TURN SIGNAL LAMP CIRCUIT
TURN SIGNAL LAMP CIRCUIT
DescriptionINFOID:0000000005146654
The BCM monitors inputs from the combination switch (lighting and turn signal switch) to determine when to
activate the turn signals. The BCM outputs voltage direction to the left and right turn signals during turn signal
operation or both during hazard warning operation. The BCM sends a turn signal indicator request to the com-
bination meter via the CAN communication lines.
The BCM performs the fast flasher operation (fail-safe) if any bulb or harness of the turn signal lamp circuit is
open.
NOTE:
Turn signal lamp blinks at normal speed when using the hazard warning lamp.
Component Function CheckINFOID:0000000005146655
1.CHECK TURN SIGNAL LAMP
CONSULT-III
1. Select "FLASHER" of BCM (FLASHER) active test item.
2. With operating the test items, check that the turn signal lamp blinks.
Does the turn signal lamp blink?
YES >> Turn signal lamp circuit is normal.
NO >> Refer to EXL-44, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005146656
Regarding Wiring Diagram information, refer to EXL-77, "Wiring Diagram".
1.CHECK TURN SIGNAL LAMP BULB
Check the applicable lamp bulb to be sure the proper bulb standard is in use and the bulb is not open.
Is the bulb OK?
YES >> GO TO 2.
NO >> Replace the bulb.
2.CHECK TURN SIGNAL LAMP OUTPUT VOLTAGE
1. Turn the ignition switch OFF.
2. Disconnect the front turn/fog lamp connector or the rear combi- nation lamp connector.
3. Turn the ignition switch ON.
4. With turn signal switch operating, check the voltage between the BCM harness connector M20 and ground.LH : Turn signal lamp LH blinking
RH : Turn signal lamp RH blinking
Off : The turn signal lamp OFF
(+)
(−) Voltage
Connector Terminal
ALLIA0896ZZ
Revision: April 20092010 QX56