INFINITI QX56 2006 Factory Service Manual

LT-104
COMBINATION SWITCH
Revision: November 20092006 QX56
3. HARNESS INSPECTION
1. Turn ignition switch OFF.
2. Disconnect BCM and combination switch connectors.
3. Check for continuity between BCM harness connector of the suspect system and the corresponding com- bination switch connector terminals.
4. Check for continuity between each terminal of BCM harness connector in suspect malfunctioning system and ground.
OK or NG
OK >> GO TO 4.
NG >> Check harness between BCM and combination switch for open or short circuit.
Sus- pect
system Terminals
Continuity
BCM Combination switch
Connector Terminal Connector Terminal
1
M18 Input 1 6
M286
Ye s
Output 1 36 1
2 Input 2 5 7
Output 2 35 2
3 Input 3 4
10
Output 3 34 3
4 Input 4 3
9
Output 4 33 4
5 Input 5 2
8
Output 5 32 5
Suspect system Terminals
Continuity
BCM
Connector Terminal
1
M18 Input 1
6
Ground No
Output 1
36
2 Input 2
5
Output 2 35
3 Input 3
4
Output 3 34
4 Input 4
3
Output 4 33
5 Input 5
2
Output 5 32
LKIA0284E

COMBINATION SWITCHLT-105
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Revision: November 2009 2006 QX56
4. BCM OUTPUT TERMINAL INSPECTION
1. Turn lighting switch and wiper switch to OFF.
2. Set wiper dial to position 4.
3. Connect BCM and combination switch connectors.
4. Turn ignition switch on.
5. Check BCM output terminal voltage waveform of suspect mal- functioning system.
OK or NG
OK >> Open circuit in combination switch, GO TO 5.
NG >> Replace BCM. Refer to BCS-20, "
BCM" .
5. COMBINATION SWITCH INSPECTION
Referring to table below, perform combination switch inspection.
>> Inspection End.
Removal and InstallationEKS00BAB
Refer to LT- 9 8 , "Removal and Installation" .
Switch Circuit InspectionEKS00BAC
Refer to LT- 1 0 3 , "Combination Switch Inspection" .
Suspect system Terminals
Combination switch (+)
Connector Terminal
1
M28Input 1
1
2 Input 22
3 Input 33
4 Input 44
5 Input 55
SKIA4976E
Procedure
12 34567
Replace lighting
switch. Confirm
check
results. OK INSPECTION END
Confirm
check
results.OK INSPECTION END
Confirm
check
results.OK INSPECTION END
NG Replace wiper
switch.
NGReplace switch
base.
NGConfirm symptom
again.

LT-106
STOP LAMP
Revision: November 20092006 QX56
STOP LAMPPFP:26550
System DescriptionEKS00BAD
Power is supplied at all times

through 10A fuse [No. 20, located in fuse block (J/B)]

to stop lamp switch terminal 3, and

to stop lamp relay terminal 1.
When the brake pedal is pressed, the stop lamp switch is closed and power is supplied

through stop lamp switch terminal 4

to stop lamp relay terminal 3

through stop lamp relay terminal 4

to rear combination lamp LH and RH terminal 2, and

to high-mounted stop lamp terminal 1.
Ground is supplied

to rear combination lamp LH terminal 1, and

to high-mounted stop lamp terminal 2

through grounds B7 and B19, and

to rear combination lamp RH terminal 1

through grounds B117 and B132.
With power and ground supplied, the stop lamps illuminate.

STOP LAMPLT-107
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Wiring Diagram — STOP/L —EKS00BAE
WKWA3659E

LT-108
STOP LAMP
Revision: November 20092006 QX56
Bulb ReplacementEKS00BAF
HIGH-MOUNTED STOP LAMP
The high-mounted stop lamp bulbs are not serviceable.
STOP LAMP
The stop lamp bulbs are not serviceable separately. Replace rear combination lamp. Refer to LT- 1 2 5 ,
"Removal and Installation" .
Removal and InstallationEKS00GDP
HIGH_MOUNTED STOP LAMP
Removal
1. Remove back door upper finisher.
2. Remove 2 nuts and remove high-mounted stop lamp.
Installation
Installation is in the reverse order of removal.
STOP LAMP
Refer to LT- 1 2 5 , "Removal and Installation" .
WKIA1397E

BACK-UP LAMPLT-109
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Revision: November 2009 2006 QX56
BACK-UP LAMPPFP:26550
Wiring Diagram — BACK/L —EKS00BAH
WKWA5520E

LT-110
BACK-UP LAMP
Revision: November 20092006 QX56
Bulb ReplacementEKS00BAI
BACK-UP LAMP
Removal
1. Remove back door lower finisher. Refer to EI-42, "Removal and Installation" .
2. Turn bulb socket counterclockwise and remove it from the lamp housing.
3. Pull bulb from socket.
INSTALLATION
Installation is in the reverse order of removal.
Removal and InstallationEKS00BAJ
BACK-UP LAMP
Removal
1. Remove license lamp finisher. Refer to EI-24, "Removal and Installation" .
2. Carefully release tabs to remove back up lamp housing from license plate finisher.
Installation
Installation is in the reverse order of removal.
WKIA1898E

PARKING, LICENSE PLATE AND TAIL LAMPSLT-111
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PARKING, LICENSE PLATE AND TAIL LAMPSPFP:26550
Component Parts and Harness Connector LocationEKS00BAK
System DescriptionEKS00BAL
Control of the parking, license plate, and tail lamp operation is dependent upon the position of the lighting
switch (combination switch). When the lighting switch is placed in the 1ST position, the BCM (body control
module) 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 (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 parking, license plate and tail lamps, which then illumi-
nate.
Power is supplied at all times

to ignition relay, located in the IPDM E/R, and

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

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

to CPU of the IPDM E/R, and

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

to BCM terminal 70.
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

to ignition relay, located in the IPDM E/R, and
Ground is supplied

to BCM terminal 67

through grounds M57, M61 and M79, and

to IPDM E/R terminals 38 and 59

through grounds E9, E15 and E24.
WKIA3468E

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-113
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Revision: November 2009 2006 QX56
SchematicEKS00BAN
WKWA3661E