2006 INFINITI QX56 turn signal

LT-112
PARKING, LICENSE PLATE AND TAIL LAMPS
Revision: November 20092006 QX56
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 parking, license plate, side marker and tail 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 10 A fuse (No. 37, located in the IPDM E/R)

through IPDM E/R terminal 57

to front combination lamp LH and RH terminal 3

to license plate lamps terminal 1 and

to rear combination lamp LH and RH terminal 3.
Ground is supplied

to front combination lamp LH and RH terminal 4

through grounds E9, E15 and E24, and

to rear combination lamp LH terminal 1

through grounds B7 and B19, and

to rear combination lamp RH terminal 1 and

to license plate lamps terminal 2

through grounds B117 and B132.
With power and ground supplied, the parking, license plate and tail lamps illuminate.
COMBINATION SWITCH READING FUNCTION
Refer to BCS-3, "COMBINATION SWITCH READING FUNCTION" .
EXTERIOR LAMP BATTERY SAVER CONTROL
When the combination switch (lighting switch) is in the 1ST (or 2ND) position, and the ignition switch is turned
from ON or ACC to OFF, the battery saver control feature is activated.
Under this condition, the parking, license and tail lamps remain illuminated for 5 minutes, then the parking,
license plate and tail lamps are turned off.
Exterior lamp battery saver control mode can be changed by the function setting of CONSULT-II.
CAN Communication System DescriptionEKS00BAM
Refer to LAN-26, "CAN COMMUNICATION" .

PARKING, LICENSE PLATE AND TAIL LAMPSLT-117
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Terminals and Reference Values for BCMEKS00BAP
Te r m i n a l
No. Wire
color Signal name Measuring condition
Reference value
(Approx.)
Ignition
switch Operation or condition
2 SB Combination switch input 5 ONLighting, turn, wiper OFF
Wiper dial position 4
3 G/Y Combination switch input 4 ONLighting, turn, wiper OFF
Wiper dial position 4
4 Y Combination switch input 3 ONLighting, turn, wiper OFF
Wiper dial position 4
5 G/B Combination switch input 2 ONLighting, turn, wiper OFF
Wiper dial position 4
6 V Combination switch input 1
32 R/G Combination switch output 5 ON Lighting, turn, wiper OFF
Wiper dial position 4
33 R/Y Combination switch output 4 ON Lighting, turn, wiper OFF
Wiper dial position 4
34 L Combination switch output 3 ON Lighting, turn, wiper OFF
Wiper dial position 4
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E
SKIA5291E

LT-118
PARKING, LICENSE PLATE AND TAIL LAMPS
Revision: November 20092006 QX56
Terminals and Reference Values for IPDM E/REKS00BAQ
How to Proceed With Trouble DiagnosisEKS00BAR
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT- 111 , "
System Description" .
3. Carry out the Preliminary Check. Refer to LT- 11 8 , "
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 CheckEKS00BAS
CHECK POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES OR FUSIBLE LINK
Check for blown fuses or fusible link.
Refer to LT- 11 4 , "
Wiring Diagram — TAIL/L —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse or fusible link is blown, be sure to eliminate cause of malfunction before installing new fuse or fusible link. Refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
35 O/B Combination switch output 2
ONLighting, turn, wiper OFF
Wiper dial position 4
36 R/W Combination switch output 1
38 W/L Ignition switch (ON) ON— Battery voltage
39 L CAN-H ———
40 P CAN-L ———
67 B Ground ON— 0V
70 W/B Battery power supply (fusible link) OFF —Battery voltage
Terminal
No. Wire
color Signal name Measuring condition
Reference value
(Approx.)
Ignition
switch Operation or condition
SKIA5292E
Te r m i n a l
No. Wire
color Signal name Measuring condition
Reference value
(Approx.)
Ignition
switch Operation or condition
38 B Ground ON— 0V
39 L CAN-H —— —
40 P CAN-L —— —
57 R/L Parking, license, and tail
lamp ON
Lighting switch
1ST position OFF
0V
ON Battery voltage
59 B Ground ON— 0V
Unit Power sourceFuse and fusible link No.
BCM Battery
f
Ignition switch ON or START position 59
IPDM E/R Battery
53
Battery (Tail lamps ON) 37

LT-120
PARKING, LICENSE PLATE AND TAIL LAMPS
Revision: November 20092006 QX56
Parking, License Plate and/or Tail Lamps Do Not IlluminateEKS00BAU
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 to LT- 1 0 3 , "
Combination Switch Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Check lighting switch. Refer to LT- 1 0 3 , "
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-24, "
Auto Active Test" .
2. Make sure parking, license plate and tail lamp operation.
OK or NG
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-30, "Removal and
Installation of IPDM E/R" .
NG >> Replace BCM. Refer to BCS-20, "
BCM" .
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
When lighting switch is in
1ST position: TAIL&CLR REQ ON
SKIA5958E

PARKING, LICENSE PLATE AND TAIL LAMPSLT-121
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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-24, "
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.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
Front combination lamp (+) (– ) Voltage
Connector Terminal
RH E107 3Ground Battery voltage
LH E11
WKIA1900E
License plate lamps (+) (– ) Voltage
Connector Terminal
D703 1Ground Battery voltage
WKIA4613E
Rear combination lamp (+)
(– ) Voltage
Connector Terminal
RH B130 3Ground Battery voltage
LH B70
WKIA1901E

REAR COMBINATION LAMPLT-125
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REAR COMBINATION LAMPPFP:26554
Bulb ReplacementEKS00BAZ
SIDE MARKER LAMP (REAR)
Side marker lamps (rear) are LED's and are not serviceable separately. Replace rear combination lamp. Refer
to LT- 1 2 5 , "
REAR COMBINATION LAMP" .
TAIL LAMP
Tail lamps are LED's and are not serviceable separately. Replace rear combination lamp. Refer to LT- 1 2 5 ,
"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.
STOP LAMP
Stop lamps are LED's and are not serviceable separately. Replace rear combination lamp. Refer to LT- 1 2 5 ,
"Removal and Installation" .
INSTALLATION
Installation is in the reverse order of removal.
Removal and InstallationEKS00BB0
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 TOWLT-127
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through IPDM E/R terminal 61

to trailer tow relay 1 terminal 3, and

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

to CPU (central processing unit) of the IPDM E/R, and

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, and

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, and

through grounds M57, M61 and M79, and

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 BRAKE, TURN SIGNAL AND HAZARD LAMP OPERATION
The trailer brake, turn signal and hazard lamps are controlled by the BCM through trailer turn relays (LH and
RH). When the brake pedal is depressed, the BCM receives stop lamp switch signal through CAN communi-
cation. If the brake pedal is depressed or either turn signal or the hazard lamps are turned on, the BCM sup-
plies 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 trailer brake, turn signal and hazard lamp output is supplied

through trailer turn relay LH terminal 3

to trailer connector terminal 1.
Right trailer brake, turn signal and hazard lamp output is supplied

through trailer turn relay RH terminal 3

INTERIOR ROOM LAMPLT-135
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System DescriptionEKS00BB6
When room lamp and personal lamp switch is in DOOR position, room lamp and personal lamp ON/OFF is
controlled by timer according to signals from switches including key switch and key lock solenoid, front door
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, and

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.