light INFINITI QX56 2010 Factory Service Manual

HEADLAMP (HI) CIRCUITEXL-31
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1. Turn the ignition switch OFF.
2. Disconnect the front combination lamp connector E11 or E107.
3. Turn the ignition switch ON.
4. Turn the high beam headlamps ON.
5. With the high beam headlamps ON, check the voltage between the combination lamp connector and ground.
Are the voltage readings as specified?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK HEADLAMP (HI) CIRCUIT FOR OPEN
1. Turn the ignition switch OFF.
2. Disconnect IPDM E/R connector E123.
3. Check continuity between the IPDM E/R harness connector (A) and the front combination lamp harness connector (B).
Does continuity exist?
YES >> GO TO 4.
NO >> Repair the harnesses or connectors.
4.CHECK FRONT COMBINATION LAMP (HI) GROUND CIRCUIT
Check continuity between the front combination lamp harness con-
nector terminal and ground.
Does continuity exist?
YES >> Inspect the headlamp bulb.
NO >> Repair the harness.
Diagnosis Procedure - With Daytime Light SystemINFOID:0000000005146642
Regarding Wiring Diagram information, refer to EXL-56, "Wiring Diagram".
1.CHECK HEADLAMP (HI) FUSES
1. Turn the ignition switch OFF.
2. Check that the following fuses are not open.
(+) (−)Voltage
Connector Terminal
LH E11 6 Ground Battery voltage
RH E107 6
ALLIA0852ZZ
AB Continuity
Connector Terminal Connector Terminal
LH E123 55
E11 6
Ye s
RH 56E107 6
AWLIA1371ZZ
Connector Terminal —Continuity
LH E11 2
Ground Yes
RH E107 2
ALLIA0854ZZ
Revision: April 20092010 QX56

EXL-32
< COMPONENT DIAGNOSIS >
HEADLAMP (HI) CIRCUIT
Is the fuse open?
YES >> Repair the harness and replace the fuse.
NO >> GO TO 2.
2.CHECK HEADLAMP (HI) OUTPUT VOLTAGE
1. Turn the ignition switch OFF.
2. Disconnect the front combination lamp connector E6 or E108.
3. Turn the ignition switch ON.
4. Turn the high beam headlamps ON.
5. With the high beam headlamps ON, check the voltage between the combination lamp connector and ground.
Are the voltage readings as specified?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK HEADLAMP (HI) CIRCUIT FOR OPEN
1. Turn the ignition switch OFF.
2. Disconnect IPDM E/R connector E123.
3. Check continuity between the IPDM E/R harness connector (A) and the front combination lamp harness connector (B).
Does continuity exist?
YES >> GO TO 4.
NO >> Repair the harnesses or connectors.
4.CHECK FRONT COMBINATION LAMP (HI) 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 daytime light rela y. If OK, repair harness. If NG,
replace the daytime light relay.
Unit LocationFuse No.Capacity
Headlamp HI (LH) IPDM E/R3510A
Headlamp HI (RH) IPDM E/R3410A
(+)
(−)Voltage
Connector Terminal
LH E6 6 GroundBattery voltage
RH E108 6
ALLIA0852ZZ
AB
Continuity
Connector Terminal Connector Terminal
LH E123 55
E66
Ye s
RH 56E108 6
AWLIA1371ZZ
Connector Terminal —Continuity
LH E6 2
Ground Yes
RH E108 2
ALLIA0854ZZ
Revision: April 20092010 QX56

HEADLAMP (LO) CIRCUITEXL-33
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HEADLAMP (LO) CIRCUIT
DescriptionINFOID:0000000005146643
The IPDM E/R (intelligent power distribution modul e engine room) controls the headlamp low relay based on
inputs from the BCM via the CAN communication li nes. When the headlamp low relay is energized, power
flows through fuses 40 and 41, located in the IPDM E/R. Power then flows to the front combination lamps to
the headlamp low beam.
Component Function CheckINFOID:0000000005146644
1.CHECK HEADLAMP (LO) OPERATION
WITHOUT CONSULT-III
1. Start IPDM E/R auto active test. Refer to PCS-12, "
Diagnosis Description".
2. Check that the headlamp is turned ON. NOTE:
HI/LO is repeated 1 second each when using the IPDM E/R auto active test.
CONSULT-III
1. Select "EXTERNAL LAMPS" of IPDM E/R active test item.
2. With the test items operating, c heck that the headlamp is turned ON.
Is the headlamp turned ON?
YES >> Headlamp (LO) is normal.
NO >> Refer to EXL-33, "
Diagnosis Procedure - Without Daytime Light System", EXL-34, "Diagnosis
Procedure - With Daytime Light System".
Diagnosis Procedure - Without Daytime Light SystemINFOID:0000000005146645
Regarding Wiring Diagram information, refer to EXL-52, "Wiring Diagram".
1.CHECK HEADLAMP (LO) 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 HEADLAMP (LO) OUTPUT VOLTAGE Lo : Headlamp ON
Off : Headlamp OFF
Unit
LocationFuse No.Capacity
Headlamp LO (LH) IPDM E/R4015A
Headlamp LO (RH) IPDM E/R4115A
Revision: April 20092010 QX56

EXL-34
< COMPONENT DIAGNOSIS >
HEADLAMP (LO) CIRCUIT
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 betweenthe 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 >> Repair the harness.
Diagnosis Procedure - With Daytime Light SystemINFOID:0000000005146646
Regarding Wiring Diagram information, refer to EXL-56, "Wiring Diagram".
1.CHECK HEADLAMP (LO) FUSES
1. Turn the ignition switch OFF.
2. Check that the following fuses are not open.
(+) (−)V olt a ge
Connector Terminal
LH E11 5
Ground Battery voltage
RH E107 5
ALLIA0855ZZ
AB
Continuity
Connector Terminal Connector Terminal
LH E123 52
E11 5
Ye s
RH 54E107 5
AWLIA1372ZZ
Connector Terminal —Continuity
LH E11 1
Ground Yes
RH E107 1
ALLIA0856ZZ
Revision: April 20092010 QX56

HEADLAMP (LO) CIRCUITEXL-35
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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-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-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-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

OPTICAL SENSOREXL-47
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OPTICAL SENSOR
DescriptionINFOID:0000000005146657
The optical sensor converts the outside brightness (lux) to voltage and transmits the optical sensor signal to
the BCM.
Component Function CheckINFOID:0000000005146658
1.CHECK OPTICAL SENSOR SIGNAL BY CONSULT-III
CONSULT-III
1. Turn the ignition switch ON.
2. Select "OPTICAL SENSOR" of BC M (HEAD LAMP) DATA MONITOR item.
3. Turn the lighting switch to AUTO.
4. With the optical sensor illuminat ing, check the monitor status.
*: Illuminates the optical sensor. The value may be less than the standard value if brightness is weak.
Is the item status normal?
YES >> Optical sensor is normal.
NO >> Refer to EXL-47, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005146659
Regarding Wiring Diagram information, refer to EXL-62, "Wiring Diagram".
1.CHECK OPTICAL SENSOR GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect BCM connector M18 and optical sensor connector M302.
3. Check continuity between BCM harness connector M18 (A) ter-
minal 18 and optical sensor harness connector M302 (B) termi-
nal 3.
4. Check continuity between BCM harness connector M18 (A) ter- minal 18 and ground.
Are continuity test results as specified?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK OPTICAL SENSOR SIGNAL CIRCUIT
Monitor item ConditionVoltage
OPTICAL SENSOR When illuminating
3.1V or more *
When shutting off light 0.6V or less
AB
Connector Terminal Connector Terminal Continuity M181 8M3023 Y es
A —Contin u it y
Connector Terminal
M18 18Ground No
AWLIA1620ZZ
Revision: April 20092010 QX56

HEADLAMP AIMING SWITCHEXL-49
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HEADLAMP AIMING SWITCH
DescriptionINFOID:0000000005146660
The manual headlamp aiming system uses a headlamp aiming switch to adjust the axis of the headlamp aim-
ing motor. The headlamp aiming switch has four settings, each with a different resistance value. The head-
lamp aiming motor adjusts to the proper axis based off the position of the headlamp aiming switch.
Diagnosis Procedure - Without Daytime Light SystemINFOID:0000000005146661
Regarding Wiring Diagram information, refer to EXL-69, "Wiring Diagram".
1.CHECK HEADLAMP AIMING SWITCH SIGNAL FOR OPEN OR SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect headlamp aiming switch connector M148 (A), headlamp aiming motor LH connector E11 and
headlamp aiming motor RH connector E107 (B).
3. Check continuity between the headlamp aiming switch connec-
tor M148 terminal 1 (A) and headlamp aiming motor LH E11 and
RH E107 terminal 7 (B).
4. Check continuity between the headlamp aiming switch connec- tor M148 terminal 1 and ground.
Are the continuity test results as specified?
YES >> GO TO 2.
NO >> Repair the harness or connector.
2.CHECK HEADLAMP AIMING SWITCH
1. Check resistance between the headlamp aiming switch termi- nals 1 and 2 in each switch position.
Are the resistance check results as specified?
YES >> GO TO 3.
NO >> Replace the headlamp aiming switch.
3.CHECK HEADLAMP AIMING SWITCH GROUND CIRCUIT
Connector Terminal Connector Terminal Continuity
M148 1E11
7Y es
E107
Connector Terminal —Continuity
M148 1Ground No
AWLIA1093ZZ
Component Terminal Switch Position Resistance
Headlamp
aiming switch 12 06
04 Ω
13 24 Ω
21 91 Ω
31 30 Ω
AWLIA1027ZZ
Revision: April 20092010 QX56