2004 INFINITI QX56 Combination

LT-120
PARKING, LICENSE PLATE AND TAIL LAMPS
Revision: August 20072004 QX56
6. CHECK GROUND
1. Check continuity between front combination lamp harness con-
nector and ground.
2. Check continuity between license lamps plate harness connec-
tor and ground.
3. Check continuity between rear combination lamp harness con-
nector and ground.
OK or NG
OK >> Check bulbs.
NG >> Repair harness or connector.
Parking, License Plate and Tail Lamps Do Not Turn OFF (After Approx. 10 Min-
utes)
EKS007CO
1. CHECK IPDM E/R
1. Turn ignition switch ON. Turn the combination switch (lighting switch) to the OFF position. Turn ignition
switch OFF.
2. Verify that the parking, license plate, and tail lamps turn on and off after approximately 10 minutes.
OK or NG
OK >> Ignition relay malfunction. Refer to PG-18, "Function of Detecting Ignition Relay Malfunction" .
NG >> Inspection End.
Front combination lamp
Continuity
ConnectorTe r m i n a l
(wire color)
RH E107
4 (B) Ground Yes
LH E11
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License plate lamps
Continuity
ConnectorTerminal
(wire color)
D703 – (B) Ground Yes
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Rear combination lamp
Continuity
ConnectorTe r m i n a l
(wire color)
RH B130
1 (B) Ground Yes
LH B70
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PARKING, LICENSE PLATE AND TAIL LAMPS
LT-121
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Front Parking LampEKS007CP
BULB REPLACEMENT
For bulb replacement, refer to LT- 3 2 , "FRONT PARKING LAMP (INNER OR OUTER)" or LT-32, "FRONT
SIDE MARKER LAMP" .
Tail LampEKS007CQ
BULB REPLACEMENT
The tail lamp bulbs are not serviceable separately. Replace rear combination lamp. Refer to LT-122, "Removal
and Installation" .
License Plate LampEKS007TR
BULB REPLACEMENT
1. Remove back door lower finisher. Refer to EI-41, "Removal and Installation" .
2. Turn bulb socket counterclockwise to remove it.
3. Pull bulb from socket.
Installation is in the reverse order of removal.

LT-122
REAR COMBINATION LAMP
Revision: August 20072004 QX56
REAR COMBINATION LAMPPFP:26554
Bulb Replacement (Turn Signal)EKS007CR
NOTE:
The tail/stop lamp bulbs are LEDs and are not serviceable separately.
1. Remove rear combination lamp mounting bolts.
2. Pull rear combination lamp to remove from the vehicle.
3. Turn bulb socket counterclockwise and unlock it.
4. Remove bulb.
Installation is in the reverse order of removal.
Removal and InstallationEKS007CS
1. Remove rear combination lamp mounting bolts.
2. Pull rear combination lamp to remove from the vehicle.
3. Disconnect rear combination lamp connectors.
Installation is in the reverse order of removal.
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Rear combination lamp
mounting bolts: 2.4 Nm (0.24 kg-m, 21 in-lb)
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INTERIOR ROOM LAMP
LT-131
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When the front door LH or RH is unlocked by the door lock and unlock switch, BCM receives serial data

to BCM terminal 22

through main power window and door lock/unlock switch terminal 14 or power window and door lock/
unlock switch RH terminal 16

through main power window and door lock/unlock switch terminal 17 or power window and door lock/
unlock switch RH terminal 11

through grounds M57, M61 and M79.
When the front door LH is unlocked by the key, the BCM receives serial data

to BCM terminal 22

through main power window and door lock/unlock switch terminal 14

through main power window and door lock/unlock switch terminal 6

through front door lock assembly LH (key cylinder switch) terminal 6

through front door lock assembly LH (key cylinder switch) terminal 5

through grounds M57, M61 and M79.
When a signal, or combination of signals is received by BCM, ground is supplied

to door mirror LH and RH terminal 13

to front room/map lamp assembly terminal 1

through front room/map lamp assembly terminal 2

to personal lamps terminal 1

through BCM terminal 63, and

to cargo lamp terminal 1

through BCM terminal 49.
With power and ground supplied, the lamps illuminate.
SWITCH OPERATION
When any door switch is ON (door is opened), ground is supplied

to front and rear step lamps LH and RH and foot lamp LH and RH terminal –

through BCM terminal 62.
And power is supplied

through BCM terminal 56

to front and rear step lamps LH and RH terminal +

to ignition keyhole illumination terminal +

to door mirror LH and RH terminal 12

to front room/map lamp assembly terminal 6

to vanity lamps terminal 1

to personal lamps terminal 3

to cargo lamp terminal 2, and

to foot lamp LH and RH terminal +.
When map lamp switch is ON, ground is supplied

to front room/map lamp assembly terminal 5

through grounds M57, M61 and M79.
When vanity lamp (LH and RH) is ON, ground is supplied

to vanity lamp (LH and RH) terminal 2

through grounds M57, M61 and M79.
When cargo lamp is ON, ground is supplied through cargo lamp case ground.
ROOM LAMP TIMER OPERATION
When lamp switch is in DOOR position, and when all conditions below are met, BCM performs timer control
(maximum 30 seconds) for interior room lamp and map lamp ON/OFF.
Power is supplied

through 10A fuse [No. 19, located in the fuse block (J/B)]

LT-152
ILLUMINATION
Revision: August 20072004 QX56
ILLUMINATIONPFP:27545
Component Parts and Harness Connector LocationEKS007D9
System DescriptionEKS007DA
Control of the illumination lamps operation is dependent upon the position of the lighting switch (combination
switch). When the lighting switch is placed in the 1ST or 2ND position (or if the auto light system is activated)
the BCM (body control module) receives input signal requesting the illumination lamps to illuminate. This input
signal is communicated to the IPDM E/R (intelligent power distribution module engine room) across the CAN
communication lines. The CPU (central processing unit) of the IPDM E/R controls the tail lamp relay coil. This
relay, when energized, directs power to the illumination lamps, which then illuminate.
Power is supplied at all times

to tail lamp relay, located in the IPDM E/R, and

through 50A fusible link (letter f , located in the fuse and fusible link box)

to BCM terminal 70, and

through 20A fuse (No. 53, located in the IPDM E/R)

to CPU of the IPDM E/R, and

through 10A fuse [No.19, located in fuse block (J/B)]

to combination meter terminal 8, and
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ILLUMINATION
LT-153
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to ignition relay, located in the IPDM E/R.
With the ignition switch in the ON or START position, power is supplied

through 10A fuse (No. 59, located in the fuse and relay box)

to BCM terminal 38, and

to ignition relay in the IPDM E/R, and

through 10A fuse [No. 14, located in the fuse block (J/B)]

to combination meter terminal 24.
Ground is supplied

to BCM terminal 67 and

to combination meter terminal 17

through grounds M57, M61 and M79, and

to IPDM E/R terminals 38 and 59

through grounds E9, E15 and E24.
ILLUMINATION OPERATION BY LIGHTING SWITCH
With the lighting switch in the 1ST or 2ND position (or if the auto light system is activated), the BCM receives
input signal requesting the illumination lamps to illuminate. This input signal is communicated to the IPDM E/R
across the CAN communication lines. The CPU of the IPDM E/R controls the tail lamp relay coil, which, when
energized, directs power

through 10A fuse (No. 36, located in the IPDM E/R)

through IPDM E/R terminal 49

to illumination control switch terminal 1

to power liftgate switch terminal 3

to front room/map lamp assembly (console box illumination) terminal 7

to hazard switch terminal 3

to rear sonar system OFF switch terminal 3

to glove box lamp terminal +

to display control unit terminal 14

to 4WD shift switch terminal 7 (with 4-wheel drive)

to front air control terminal 23

to rear power vent window switch terminal 5

to DVD player terminal 12 (with DVD entertainment system)

to NAVI control unit terminal 25

to pedal adjusting switch terminal 5

to electric brake (pre-wiring) terminal 4

to heated seat switches terminal 5

to A/T device terminal 11

to VDC OFF switch terminal 3

to tow mode switch terminal 3

to headlamp aiming switch terminal 3

to clock terminal 3

to compass and thermometer terminal 4, and

through 10A fuse (No. 37, located in the IPDM E/R)

through IPDM E/R terminal 57

to AV switch terminal 3

to audio unit terminal 8

to rear air control terminal 1 and

to rear audio remote control unit terminal 6.
Illumination is controlled

through illumination control switch terminal 2

LT-154
ILLUMINATION
Revision: August 20072004 QX56

to power liftgate switch terminal 4

to front room/map lamp assembly (console box illumination) terminal 8

to AV switch terminal 4

to hazard switch terminal 4

to audio unit terminal 7

to rear sonar system OFF switch terminal 4

to 4WD switch terminal 8 (with 4-wheel drive)

to front air control terminal 24 and

to rear power vent window switch terminal 6

to DVD player terminal 10 (with DVD entertainment system)

to pedal adjusting switch terminal 6

to A/T device terminal 12

to front heated seat switches terminal 6

to VDC OFF switch terminal 4

to tow mode switch terminal 4

to headlamp aiming switch terminal 4

to clock terminal 4 and

to combination meter terminal 18.
Ground is supplied

to illumination control switch terminal 3

to glove box lamp terminal –

to display control unit terminal 3

to rear heated seat switches terminal 6

to electric brake (pre-wiring) terminal 1 and

to compass and thermometer terminal 7

through grounds M57, M61 and M79, and

to NAVI control unit terminal 30

to rear air control terminal 3 and

to rear audio remote control unit terminal 15

through grounds B117 and B132.
With power and ground supplied, illumination lamps illuminate.
EXTERIOR LAMP BATTERY SAVER CONTROL
When the combination switch (lighting switch) is in the 1ST or 2ND position (or if auto light system is acti-
vated), and the ignition switch is turned from ON or ACC to OFF, the battery saver control function is activated.
Under this condition, the illumination lamps remain illuminated for 5 minutes, then the illumination lamps are
turned off.
When the lighting switch is turned from OFF to 1ST or 2ND position (or if auto light system is activated) after
illumination lamps are turned off by the battery saver control, the illumination lamps illuminate again.
Exterior lamp battery saver control mode can be changed by the function setting of CONSULT-II.
CAN Communication System DescriptionEKS007DB
Refer to LAN-5, "CAN COMMUNICATION" .

ILLUMINATION
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Removal and InstallationEKS007DE
ILLUMINATION CONTROL SWITCH
1. Remove cluster lid A. Refer to DI-25, "Removal and Installation of Combination Meter" .
2. Carefully pry tabs and remove illumination control switch from
cluster lid A.
Installation is in the reverse order of removal.
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