2007 INFINITI QX56 turn signal

LT-88
< SERVICE INFORMATION >
PARKING, LICENSE PLATE AND TAIL LAMPS
How to Proceed with Trouble Diagnosis
INFOID:0000000003533441
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT-82, "
System Description" .
3. Carry out the Preliminary Check. Refer to LT-88, "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Do the parking, license and tail lamps operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.
Preliminary CheckINFOID:0000000003533442
CHECK POWER SUPPLY AND GROUND CIRCUIT FOR BCM
Refer to BCS-15, "BCM Power Supply and Ground Circuit Inspection" .
CHECK POWER SUPPLY AND GROUND CIRCUIT FOR IPDM E/R
Refer to PG-26, "IPDM E/R Power/Ground Circuit Inspection" .
CONSULT-II Function for BCMINFOID:0000000003533443
Refer to BCS-16, "CONSULT-II Function (BCM)" .
CONSULT-II Function for IPDM E/RINFOID:0000000003533444
Refer to PG-18, "CONSULT-II Function (IPDM E/R)" .
Parking, License Plate and/or Tail Lamps Do Not IlluminateINFOID:0000000003533445
1.CHECK COMBINATION SWITCH INPUT SIGNAL
With CONSULT-II
Select "BCM" on CONSULT-II. With "HEAD LAMP" data monitor,
make sure "LIGHT SW 1ST" turns ON-OFF linked with operation of
lighting switch.
Without CONSULT-II
Refer toLT-73, "
Combination Switch Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Check lighting switch. Refer to LT-73, "
Combination
Switch Inspection" .
2.ACTIVE TEST
With CONSULT-II
1. Select "IPDM E/R" on CONSULT-II, and select "ACTIVE TEST"
on "SELECT DIAG MODE" screen.
2. Select "EXTERNAL LAMPS" on "SELECT TEST ITEM" screen.
3. Touch "TAIL" on "ACTIVE TEST" screen.
4. Make sure parking, license plate and tail lamp operation.
Without CONSULT-II
1. Start auto active test. Refer to PG-20, "
Auto Active Test" .
2. Make sure parking, license plate and tail lamp operation.
OK or NG
When lighting switch is in
1ST position: LIGHT SW 1ST ON
SKIA5956E
Parking, license plate and tail lamp should operate
Parking, license plate and tail lamp should operate
WKIA1438E

PARKING, LICENSE PLATE AND TAIL LAMPS
LT-89
< SERVICE INFORMATION >
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OK >> GO TO 3.
NG >> GO TO 4.
3.CHECK IPDM E/R
1. Select "IPDM E/R" on CONSULT-II, and select "DATA MONI-
TOR" on "SELECT DIAG MODE" screen.
2. Make sure "TAIL&CLR REQ" turns ON when lighting switch is in
1ST position.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-28, "Removal and
Installation of IPDM E/R" .
NG >> Replace BCM. Refer to BCS-24, "
BCM" .
4.CHECK INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch OFF.
2. Disconnect front combination lamp, license plate lamp and rear combination lamp connectors.
3. Turn ignition switch ON.
4. Select "IPDM E/R" on CONSULT-II, and select "ACTIVE TEST" on "SELECT DIAG MODE" screen.
5. Select "TAIL LAMP" on "SELECT TEST ITEM" screen.
6. Touch "ON" on "ACTIVE TEST" screen.
7. When tail lamp is operating, check voltage between front combination lamp, license plate lamp, rear com-
bination lamp harness connector and ground.
Without CONSULT-II
1. Start auto active test. Refer to PG-20, "
Auto Active Test".
2. When tail lamp is operating, check voltage between front combination lamp, license plate lamp, rear com-
bination lamp connector and ground.When lighting switch is in
1ST position: TAIL&CLR REQ ON
SKIA5958E
Front combination lamp (+)
(–) Voltage
Connector Terminal
RH E107
3 Ground Battery voltage
LH E11
WKIA1900E
License plate lamps (+)
(–) Voltage
Connector Terminal
D703 1 Ground Battery voltage
WKIA4613E

REAR COMBINATION LAMP
LT-93
< SERVICE INFORMATION >
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REAR COMBINATION LAMP
Bulb ReplacementINFOID:0000000003533449
SIDE MARKER LAMP (REAR)
Side marker lamps (rear) are LED's and are not serviceable separately. Replace rear combination lamp. Refer
to LT-93, "
Removal and Installation".
TAIL LAMP
Tail lamps are LED's and are not serviceable separately. Replace rear combination lamp. Refer to LT-93,
"Removal and Installation" .
TURN SIGNAL
Removal
1. Remove rear combination lamp bolts.
2. Pull rear combination lamp to remove from the vehicle.
3. Turn bulb socket counterclockwise and remove turn signal
socket.
4. Remove turn signal lamp bulb.
Installation
Installation is in the reverse order of removal.
STOP LAMP
Stop lamps are LED's and are not serviceable separately. Replace rear combination lamp. Refer to LT-93,
"Removal and Installation".
Removal and InstallationINFOID:0000000003533450
REAR COMBINATION LAMP
Removal
1. Remove rear combination lamp mounting bolts.
2. Pull rear combination lamp to remove from the vehicle.
3. Disconnect rear combination lamp connectors.
Installation
Installation is in the reverse order of removal.
WKIA1393E
WKIA1393E

TRAILER TOW
LT-95
< SERVICE INFORMATION >
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• to trailer tow relay 1 terminal 3,
• through 20A fuse (No. 53, located in the IPDM E/R)
• to CPU (central processing unit) of the IPDM E/R,
• through 30A fusible link (letter j , located in the fuse and fusible link box)
• to trailer tow relay 2 terminals 3 and 6, and
• through 40A fusible link (letter k , located in the fuse and fusible link box)
• to electric brake (pre-wiring) terminal 5.
With the ignition switch in the ON or START position, power is supplied
• to ignition relay, located in the IPDM E/R,
• through 10A fuse (No. 59, located in the fuse and relay box)
• to BCM terminal 38, and
• through 10A fuse (No. 51, located in the IPDM E/R)
• to trailer tow relay 2 terminal 1.
Ground is supplied
• to BCM terminal 67
• to electric brake (pre-wiring) terminal 1,
• through grounds M57, M61 and M79,
• to IPDM E/R terminals 38 and 59
• to trailer tow relay 1 terminal 2
• to trailer tow relay 2 terminal 2, and
• to trailer connector terminal 2
• to trailer turn relay LH and RH terminal 2
• through grounds E9, E15 and E24.
TRAILER TAIL LAMP OPERATION
The trailer tail lamps are controlled by the trailer tow relay 1.
With the lighting switch in the parking and tail lamp ON (1ST) position, AUTO position (and the auto light sys-
tem is activated) or headlamp ON (2ND) position, power is supplied
• through the tail lamp relay, located in the IPDM E/R
• through 10A fuse (No. 36, located in the IPDM E/R)
• through IPDM E/R terminal 49
• to trailer tow relay 1 terminal 1.
When energized, trailer tow relay 1 supplies tail lamp power to trailer connector terminal 6.
TRAILER TURN SIGNAL AND HAZARD LAMP OPERATION
The trailer turn signal and hazard lamps are controlled by the BCM through trailer turn relays (LH and RH). If
either turn signal or the hazard lamps are turned on, the BCM supplies voltage to the trailer turn relays (LH
and RH) to make them cycle on and off.
Trailer turn relay LH output is supplied
• through BCM terminal 52
• to trailer turn relay LH terminal 1.
Trailer turn relay RH output is supplied
• through BCM terminal 51
• to trailer turn relay RH terminal 1.
Left turn signal and hazard lamp output is supplied
• through trailer turn relay LH terminal 3
• to trailer connector terminal 1.
Right turn signal and hazard lamp output is supplied
• through trailer turn relay RH terminal 3
• to trailer connector terminal 4.
TRAILER STOP LAMP OPERATION
The trailer stop lamps are controlled by the electric brake. The electric brake receives stop lamp switch signal
when the brake pedal is pressed.
When the brake pedal is pressed, power is supplied
• through electric brake (pre-wiring) terminal 3
• to trailer connector terminal 3.
TRAILER POWER SUPPLY OPERATION
The trailer power supply is controlled by the trailer tow relay 2.
When the ignition switch is in the ON or START position, power is supplied
• through 10A fuse (No. 51, located in the IPDM E/R)

LT-102
< SERVICE INFORMATION >
INTERIOR ROOM LAMP
switch LH, unlock signal from keyfob, door lock and unlock switch, front door lock assembly LH (key cylinder
switch), ignition switch, and glass hatch ajar switch.
When room lamp and personal lamp turns ON, there is a gradual brightening over 1 second. When room lamp
and personal lamp turns OFF, there is a gradual dimming over 1 second.
The room lamp and personal lamp timer is controlled by the BCM (body control module).
Room lamp and personal lamp timer control settings can be changed with CONSULT-II.
Ignition keyhole illumination turns ON when front door LH is opened (door switch ON) or key is removed from
key cylinder. Illumination turns OFF when front door LH is closed (door switch OFF).
Step and foot lamps turn ON when front or rear doors are opened (door switch ON). Lamps turn OFF when
front and rear doors are closed (all door switches OFF).
POWER SUPPLY AND GROUND
Power is supplied at all times
• through 10A fuse [No. 19, located in the fuse block (J/B)]
• to key switch and key lock solenoid terminal 3,
• through 15A fuse [No. 22, located in the fuse block (J/B)]
• to BCM terminal 57, and
• through 50A fusible link (letter f , located in the fuse and fusible link box)
• to BCM terminal 70.
When the key is inserted in key switch and key lock solenoid, power is supplied
• through the key switch and key lock solenoid terminal 4
• to BCM terminal 37.
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.
Ground is supplied
• to BCM terminal 67
• through grounds M57, M61 and M79.
When the front door LH is opened, ground is supplied
• to BCM terminal 47
• through case ground of front door switch LH.
When the front door RH is opened, ground is supplied
• to BCM terminal 12
• through case ground of front door switch RH.
When the rear door LH is opened, ground is supplied
• to BCM terminal 48
• through case ground of rear door switch LH.
When the rear door RH is opened, ground is supplied
• to BCM terminal 13
• through case ground of rear door switch RH.
When the liftgate is opened, ground is supplied
• to BCM terminal 43
• through back door latch (door ajar switch) terminal 7
• through back door latch (door ajar switch) terminal 8
• through grounds B7 and B19.
When the glass hatch is opened, ground is supplied
• to BCM terminal 42
• through case ground of glass hatch ajar switch.
When the front door LH or front door RH door 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

INTERIOR ROOM LAMP
LT-103
< SERVICE INFORMATION >
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• through grounds M57, M61 and M79.
When a signal, or combination of signals is received by BCM, ground is supplied
• through BCM terminal 63
• 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, and
• through BCM terminal 49
• to cargo lamp terminal 1.
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 lamp LH and RH terminal 1
• to personal lamp 2nd row and 3rd row 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 all conditions below are met, BCM performs timer control (maxi-
mum 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)]
• to key switch and key lock solenoid terminal 3.
Key is removed from ignition key cylinder (key switch OFF), power will not be supplied to BCM terminal 37.
Serial data is supplied
• to BCM terminal 22
• through main power window and door lock/unlock switch terminal 14.
At the time that front door LH is opened, BCM detects that front door LH is unlocked. It determines that interior
room lamp and map lamp timer operation conditions are met, and turns the interior room lamps ON for 30 sec-
onds.
Key is in ignition key cylinder (key switch ON), power is supplied
• through key switch and key lock solenoid terminal 4
• to BCM terminal 37.
When key is removed from key switch and key lock solenoid (key switch OFF), power supply to BCM terminal
37 is terminated. BCM detects that key has been removed, determines that interior room lamp and map lamp
timer conditions are met, and turns the interior room lamps ON for 30 seconds.
When front door LH opens → closes, and the key is not inserted in the key switch and key lock solenoid (key
switch OFF), BCM terminal 47 changes between 0V (door open) → 12V (door closed). The BCM determines
that conditions for interior room lamp operation are met and turns the interior room lamp ON for 30 seconds.
Timer control is canceled under the following conditions.
• Front door LH is locked [when locked by keyfob, main power window and door lock/unlock switch, or front
door lock assembly LH (key cylinder switch)]
• Front door LH is opened (front door switch LH turns ON)
• Ignition switch ON.
INTERIOR LAMP BATTERY SAVER CONTROL

LT-104
< SERVICE INFORMATION >
INTERIOR ROOM LAMP
If interior lamp is left “ON”, it will not be turned off even when door is closed.
BCM turns off interior lamp automatically to save battery 30 minutes after ignition switch is turned off.
BCM controls interior lamps listed below:
• Vanity lamp
• Room/map lamp
• Cargo lamp
• Personal lamp
• Step lamps
• Puddle lamps
• Foot lamps
• Ignition keyhole illumination
After lamps turn OFF by the battery saver system, the lamps illuminate again when
• signal received from keyfob, or main power window and door lock/unlock switch or front door lock assembly
LH (key cylinder switch) is locked or unlocked
• door is opened or closed
• key is removed from ignition key cylinder (key switch OFF) or inserted in ignition key cylinder (key switch
ON).
Interior lamp battery saver control period can be changed by the function setting of CONSULT-II.

LT-114
< SERVICE INFORMATION >
INTERIOR ROOM LAMP
3. Carry out the Preliminary Check. Refer to LT-114, "Preliminary Check" .
4. Check symptom and repair or replace the component.
5. Does the interior room lamp operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.
Preliminary CheckINFOID:0000000003533461
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT FOR BCM
Refer to BCS-15, "BCM Power Supply and Ground Circuit Inspection" .
CONSULT-II Function (BCM)INFOID:0000000003533462
Refer to BCS-16, "CONSULT-II Function (BCM)" .
CONSULT-II START PROCEDURE
Refer to GI-36, "CONSULT-II Start Procedure" .
WORK SUPPORT
Display Item List
Reference between "MODE" and "TIME" for "TURN ON/OFF".
DATA MONITOR
Display Item List
Item Description CONSULT-II
SET I/L D-UNLCK INTCONThe 30 seconds operating function of the interior room lamps and the
ignition keyhole illumination can be selected when front door LH is re-
leased (unlocked). ON/OFF
ROOM LAMP ON TIME SETThe time in order to escalate illumination can be adjusted when the inte-
rior room lamps and the ignition keyhole illumination is turned on.MODE 1 - 7
ROOM LAMP OFF TIME SETThe time in order to diminish illumination can be adjusted when the inte-
rior room lamps and the ignition keyhole illumination is turned off.MODE 1 - 7
MODE 123 4 5 6 7
Time (sec.) 0.5 1 2 3 4 5 0
Monitor item Contents
IGN ON SW "ON/OFF" Displays "IGN position (ON)/OFF, ACC position (OFF)" judged from the ignition switch signal.
KEY ON SW "ON/OFF" Displays "Key inserted (ON)/key removed (OFF)" status judged from the key switch signal.
DOOR SW-DR "ON/OFF"Displays status of the front door LH as judged from the front door switch LH signal. (Door is
open: ON/Door is closed: OFF)
DOOR SW-AS "ON/OFF"Displays "Door open (ON)/Door closed (OFF)" status, determined from front door switch RH
signal.
DOOR SW-RR "ON/OFF"Displays "Door open (ON)/Door closed (OFF)" status, determined from rear door switch RH
signal.
DOOR SW-RL "ON/OFF"Displays "Door open (ON)/Door closed (OFF)" status, determined from rear door switch LH
signal.
BACK DOOR SW "ON/OFF"Displays "Door open (ON)/Door closed (OFF)" status, determined from back door latch (door
ajar switch) signal.
KEY CYL LK-SW "ON/OFF"Displays "Door locked (ON)" status, determined from front door lock assembly LH (key cylin-
der switch) in front door LH.
KEY CYL UN-SW "ON/OFF"Displays "Door unlocked (OFF)" status, determined from front door lock assembly LH (key
cylinder switch) in front door LH.
CDL LOCK SW "ON/OFF"Displays "Door locked (ON)/Door unlocked (OFF)" status, determined from locking detection
switch in front door LH.