2010 INFINITI QX56 bulb

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

FRONT FOG LAMP CIRCUITEXL-37
< COMPONENT DIAGNOSIS >
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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

PARKING LAMP CIRCUITEXL-41
< COMPONENT DIAGNOSIS >
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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

PARKING LAMP CIRCUITEXL-43
< COMPONENT DIAGNOSIS >
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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

EXL-136
< SYMPTOM DIAGNOSIS >
EXTERIOR LIGHTING SYSTEM SYMPTOMS
SYMPTOM DIAGNOSIS
EXTERIOR LIGHTING SYSTEM SYMPTOMS
Symptom TableINFOID:0000000005146686
CAUTION:
Perform the self-diagnosis with CONSULT-III before the symptom diagnosis. Perform the trouble diag-
nosis if any DTC is detected.
Symptom Possible causeInspection item
Headlamp does not
switch to the high beam. One side•Fuse
• Harness between IPDM E/R
and the front combination lamp
• Front combination lamp
(High beam relay)
• IPDM E/R Headlamp (HI) circuit
Refer to EXL-30, "
Description".
Both sides Symptom diagnosis
"BOTH SIDE HEADLAMPS DO NOT SWITCH TO HIGH BEAM"
Refer to
EXL-139
.
High beam indicator lamp is not turned ON.
(Headlamp switches to the high beam.) • Combination meter
•BCM• Combination meter.
Data monitor "HI-BEAM IND".
• BCM (HEAD LAMP) Active test "HEADLAMP".
Headlamp does not
switch to the low beam. One side
Front combination lamp (Low
beam relay)
—
Both sides • Combination switch (lighting
and turn signal switch)
• Harness between the combina-
tion switch and BCM
•BCM Combination switch
Refer to BCS-38
.
High beam request signal
•BCM
• IPDM E/R IPDM E/R
Data monitor "HL HI REQ".
IPDM E/R —
Headlamp does not turn
ON. One side•Fuse
•Bulb
• Harness between IPDM E/R
and the front combination lamp
• Front combination lamp
• IPDM E/R Headlamp (L
O) circuit
Refer to EXL-33
.
Both sides Symptom diagnosis
"BOTH SIDE HEADLAMPS (LO) ARE NOT TURNED ON"
Refer to
EXL-140, "
Description".
Headlamp does not turn
OFF. When the ignition
switch is turned ON•BCM
• Combination switch (lighting
and turn signal switch) Combination switch (lighting and
turn signal switch)
Refer to BCS-38
.
Headlamp is not turned ON/OFF with the lighting
switch AUTO. • Combination switch (lighting
and turn signal switch)
• Harness between the combina-
tion switch and BCM
•BCM Combination switch (lighting and
turn signal switch)
Refer to BCS-38
.
• Optical sensor
• Harness between the optical sensor and BCM
•BCM Optical sensor
Refer to EXL-47
.
Revision: April 20092010 QX56

EXTERIOR LIGHTING SYSTEM SYMPTOMSEXL-137
< SYMPTOM DIAGNOSIS >
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Daytime light system does not activate. • Either high beam bulb
• Parking brake switch
• Combination switch (lighting
and turn signal switch)
•BCM
• IPDM E/R
• Daytime light relay
• Harness between IPDM E/R
and daytime light relay. Daytime light system description.
Refer to
EXL-9, "System Descrip-
tion".
Front fog lamp is not
turned ON. One side
• Front fog lamp bulb
• Harness between IPDM E/R
and the front combination lamp
• Front combination lamp
• IPDM E/R Front fog lamp circuit
Refer to
EXL-36
.
Both sides Symptom diagnosis
"BOTH SIDE FRONT FOG LAMPS ARE NOT TURNED ON"
Refer to EXL-142
.
Parking lamp is not turned
ON. One side•Fuse
• Parking lamp bulb
• Harness between IPDM E/R
and the front/rear combination
lamp
• Front/rear combination lamp
• IPDM E/R Parking lamp circuit
Refer to
EXL-38
.
Both sides Symptom diagnosis
"PARKING, LICENSE PLATE AND TAIL LAMPS ARE NOT TURNED
ON"
Refer to EXL-141
.
Turn signal lamp does not
blink. Indicator lamp is nor-
mal.
(The applicable side
performs the high flash-
er activation).• Harness between BCM and
each turn signal lamp
• Turn signal lamp bulb
• Door mirror Turn signal lamp circuit
Refer to
EXL-44
.
Turn signal indicator lamp
does not blink. One side
Combination meter —
Both sides
(Always) • Turn signal indicator lamp sig-
nal
• Combination meter
•BCM • Combination meter.
Data monitor "TURN IND".
• BCM (FLASHER) Active test "FLASHER".
Both sides
(Does blink when acti-
vating the hazard warn-
ing lamp with the
ignition switch OFF) • The combination meter power
supply and the ground circuit
• Combination meter Combination meter
Power supply and the ground circuit
Refer to
MWI-28
.
Symptom
Possible causeInspection item
Revision: April 20092010 QX56

EXL-138
< SYMPTOM DIAGNOSIS >
NORMAL OPERATING CONDITION
NORMAL OPERATING CONDITION
DescriptionINFOID:0000000005146687
XENON HEADLAMPS
The brightness and color of the light may vary slightly immediately after turning the headlamp ON. This condi-
tionwill remain until the xenon bulb becomes stable. This is normal.
• Illumination time lag may occur between right and left. This is normal.
AUTO LIGHT SYSTEM
The auto light system may not turn the headlamp ON/OF F immediately after passing a dark area or a bright
area (short tunnel, sky bridge, shadowed area etc.). This is normal.
Revision: April 20092010 QX56