service INFINITI QX56 2007 Factory Service Manual

LT-74
< SERVICE INFORMATION >
COMBINATION SWITCH
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. Connect CONSULT-II, and select "COMB SW" on "SELECT
TEST ITEM" screen.
2. Select "DATA MONITOR".
3. Select "START", and confirm that other switches in malfunction-
ing system operate normally.
Example: When auto light switch is malfunctioning, confirm that
"FRONT WIPER LOW" and "FRONT WIPER INT" in System 3,
to which the auto light switch belongs, turn ON-OFF normally.
Without CONSULT-II
Operate combination switch, and confirm that other switches in malfunctioning system operate normally.
Example: When auto light switch is malfunctioning, confirm that "FRONT WIPER LOW" and "FRONT WIPER
INT" in System 3, to which the auto light switch belongs, operate normally.
Check results
Other switches in malfunctioning system operate normally.>>Replace lighting switch or wiper switch.
Other switches in malfunctioning system do not operate normally.>>GO TO 3.
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.
SKIA7075E
Sus-
pect
systemTe r m i n a l s
Continuity BCM Combination switch
Connector Terminal Connector Terminal
1
M18Input 1 6
M286
Ye s Output 1 36 1
2Input 2 5 7
Output 2 35 2
3Input 3 4 10
Output 3 34 3
4Input 4 3 9
Output 4 33 4
5Input 5 2 8
Output 5 32 5
LKIA0284E

COMBINATION SWITCH
LT-75
< SERVICE INFORMATION >
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OK or NG
OK >> GO TO 4.
NG >> Check harness between BCM and combination switch for open or short circuit.
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-24, "
BCM" .
5.COMBINATION SWITCH INSPECTION
Referring to table below, perform combination switch inspection.
Suspect
systemTe r m i n a l s
Continuity BCM
Connector Terminal
1
M18Input 1 6
Ground No Output 1 36
2Input 2 5
Output 2 35
3Input 3 4
Output 3 34
4Input 4 3
Output 4 33
5Input 5 2
Output 5 32
Suspect systemTe r m i n a l s
Combination switch (+)
Connector Terminal
1
M28Input 1 1
2 Input 2 2
3 Input 3 3
4 Input 4 4
5 Input 5 5
SKIA4976E

LT-76
< SERVICE INFORMATION >
COMBINATION SWITCH
>> Inspection End.
Removal and InstallationINFOID:0000000003533425
Refer to LT-70, "Removal and Installation".
Switch Circuit InspectionINFOID:0000000003533426
Refer to "Switch Circuit Inspection".
Procedure
12 34567
Replace
lighting
switch.Confirm
check re-
sults.OK INSPECTION END
Confirm
check re-
sults.OK INSPECTION END
Confirm
check re-
sults.OK INSPECTION END
NGReplace wiper
switch.NGReplace switch
base.NGConfirm symptom
again.

STOP LAMP
LT-77
< SERVICE INFORMATION >
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STOP LAMP
System DescriptionINFOID:0000000003533427
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,
• 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.

LT-78
< SERVICE INFORMATION >
STOP LAMP
Wiring Diagram - STOP/L -
INFOID:0000000003533428
Bulb ReplacementINFOID:0000000003533429
HIGH-MOUNTED STOP LAMP
The high-mounted stop lamp bulbs are not serviceable.
STOP LAMP
WKWA3659E

STOP LAMP
LT-79
< SERVICE INFORMATION >
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The stop lamp bulbs are not serviceable separately. Replace rear combination lamp. Refer to LT-93, "Removal
and Installation".
Removal and InstallationINFOID:0000000003533430
HIGH-MOUNTED STOP LAMP
Removal
1. Remove back door upper finisher. Refer to EI-39.
2. Remove two nuts and remove high-mounted stop lamp.
Installation
Installation is in the reverse order of removal.
STOP LAMP
Refer to LT-93, "Removal and Installation".
WKIA1397E

LT-80
< SERVICE INFORMATION >
BACK-UP LAMP
BACK-UP LAMP
Wiring Diagram - BACK/L -INFOID:0000000003533431
Bulb ReplacementINFOID:0000000003533432
BACK-UP LAMP
Removal
AWLWA0434GB

BACK-UP LAMP
LT-81
< SERVICE INFORMATION >
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1. Remove back door lower finisher. Refer to EI-39.
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 InstallationINFOID:0000000003533433
BACK-UP LAMP
Removal
1. Remove license lamp finisher. Refer to EI-23.
2. Carefully release tabs to remove back up lamp housing from
license plate finisher.
Installation
Installation is in the reverse order of removal.
WKIA1898E

LT-82
< SERVICE INFORMATION >
PARKING, LICENSE PLATE AND TAIL LAMPS
PARKING, LICENSE PLATE AND TAIL LAMPS
Component Parts and Harness Connector LocationINFOID:0000000003533434
System DescriptionINFOID:0000000003533435
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,
• to tail lamp relay, located in the IPDM E/R,
• 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.
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
WKIA3468E

PARKING, LICENSE PLATE AND TAIL LAMPS
LT-83
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• 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,
• to rear combination lamp LH terminal 1
• through grounds B7 and B19,
• 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, "System Description" .
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 DescriptionINFOID:0000000003533436
Refer to LAN-4, "CAN Communication System".