2006 INFINITI QX56 warning light

LT-2Revision: November 20092006 QX56
System Description ..............................................
... 48
OUTLINE .......................................................... ... 48
COMBINATION SWITCH READING FUNCTION ... 48
EXTERIOR LAMP BATTERY SAVER CONTROL ... 48
DELAY TIMER FUNCTION .............................. ... 48
CAN Communication System Description ........... ... 48
Major Components and Functions ....................... ... 48
Schematic ............................................................ ... 49
Wiring Diagram — AUTO/L — ............................. ... 50
Terminals and Reference Values for BCM ........... ... 53
Terminals and Reference Values for IPDM E/R ... ... 54
How to Proceed With Trouble Diagnosis ............. ... 55
Preliminary Check ............................................... ... 55
SETTING CHANGE FUNCTIONS .................... ... 55
CHECK POWER SUPPLY AND GROUND CIR-
CUIT ................................................................. ... 55
CONSULT-II Function (BCM) ............................... ... 57
CONSULT-II OPERATION ................................ ... 57
WORK SUPPORT ............................................ ... 58
DATA MONITOR ............................................... ... 58
ACTIVE TEST .................................................. ... 59
SELF-DIAGNOSTIC RESULTS ........................ ... 59
CONSULT-II Function (IPDM E/R) ....................... ... 60
CONSULT-II OPERATION ................................ ... 60
DATA MONITOR ............................................... ... 61
ACTIVE TEST .................................................. ... 61
Trouble Diagnosis Chart by Symptom ................. ... 62
Lighting Switch Inspection ................................... ... 62
Optical Sensor System Inspection ....................... ... 63
Optical Sensor ..................................................... ... 64
REMOVAL AND INSTALLATION ...................... ... 64
HEADLAMP AIMING CONTROL ........................... ... 65
System Description .............................................. ... 65
Wiring Diagram — H/AIM — ................................ ... 66
Headlamp Aiming Switch ..................................... ... 68
REMOVAL AND INSTALLATION ...................... ... 68
Switch Circuit Inspection ..................................... ... 68
FRONT FOG LAMP ............................................... ... 69
Component Parts and Harness Connector Location ... 69
System Description .............................................. ... 69
OUTLINE .......................................................... ... 69
COMBINATION SWITCH READING FUNCTION ... 70
EXTERIOR LAMP BATTERY SAVER CONTROL ... 70
CAN Communication System Description ........... ... 70
Wiring Diagram — F/FOG — ............................... ... 71
Terminals and Reference Values for BCM ........... ... 73
Terminals and Reference Values for IPDM E/R ... ... 74
How to Proceed With Trouble Diagnosis ............. ... 74
Preliminary Check ............................................... ... 75
CHECK POWER SUPPLY AND GROUND CIR-
CUIT ................................................................. ... 75
CONSULT-II Functions ........................................ ... 76
Front Fog Lamps Do Not Illuminate (Both Sides) ... 76
Front Fog Lamp Does Not Illuminate (One Side) ... 77
Aiming Adjustment ............................................... ... 78
Bulb Replacement ............................................... ... 79
FRONT FOG LAMP .......................................... ... 79INSTALLATION ................................................
... 79
Removal and Installation ...................................... ... 79
FRONT FOG LAMP .......................................... ... 79
INSTALLATION ................................................ ... 79
TURN SIGNAL AND HAZARD WARNING LAMPS ... 80
Component Parts and Harness Connector Location ... 80
System Description .............................................. ... 80
OUTLINE .......................................................... ... 80
TURN SIGNAL OPERATION ............................ ... 80
HAZARD LAMP OPERATION .......................... ... 81
REMOTE KEYLESS ENTRY SYSTEM OPERA-
TION ................................................................. ... 82
COMBINATION SWITCH READING FUNCTION ... 82
CAN Communication System Description ........... ... 82
Schematic ............................................................ ... 83
Wiring Diagram — TURN — ................................ ... 84
Terminals and Reference Values for BCM ........... ... 87
How to Proceed With Trouble Diagnosis ............. ... 88
Preliminary Check ................................................ ... 89
CHECK POWER SUPPLY AND GROUND CIR-
CUIT .................................................................. ... 89
CONSULT-II Function (BCM) ............................... ... 90
CONSULT-II OPERATION ................................ ... 90
DATA MONITOR ............................................... ... 91
ACTIVE TEST ................................................... ... 91
Front Turn Signal Lamp Does Not Operate ......... ... 92
Door Mirror Turn Signal Lamp Does Not Operate ... 93
Rear Turn Signal Lamp Does Not Operate .......... ... 94
Hazard Warning Lamp Does Not Operate But Turn
Signal Lamps Operate ......................................... ... 95
Turn Signal Indicator Lamp Does Not Operate .... ... 96
Bulb Replacement ................................................ ... 97
TURN SIGNAL LAMP (FRONT) ....................... ... 97
TURN SIGNAL LAMP (REAR) .......................... ... 97
Removal and Installation ...................................... ... 97
FRONT TURN SIGNAL LAMP .......................... ... 97
REAR TURN SIGNAL LAMP ............................ ... 97
LIGHTING AND TURN SIGNAL SWITCH ............. ... 98
Removal and Installation ...................................... ... 98
REMOVAL ........................................................ ... 98
INSTALLATION ................................................ ... 98
HAZARD SWITCH .................................................. ... 99
Removal and Installation ...................................... ... 99
REMOVAL ........................................................ ... 99
INSTALLATION ................................................ ... 99
COMBINATION SWITCH ....................................... .100
Wiring Diagram — COMBSW — ......................... .100
Combination Switch Reading Function ................ .101
CONSULT-II Function (BCM) ............................... .101
CONSULT-II OPERATION ................................ .101
DATA MONITOR ............................................... .102
Combination Switch Inspection ............................ .103
Removal and Installation ...................................... .105
Switch Circuit Inspection ...................................... .105
STOP LAMP ........................................................... .106
System Description .............................................. .106
Wiring Diagram — STOP/L — ............................. .107
Bulb Replacement ................................................ .108
HIGH-MOUNTED STOP LAMP ........................ .108

LT-4
PRECAUTIONS
Revision: November 20092006 QX56
PRECAUTIONS PFP:00011
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EKS00B7P
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER ”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
General precautions for service operationsEKS00B7Q

Never work with wet hands.

Xenon headlamp includes high voltage generating part. Be sure
to disconnect battery negative cable (negative terminal) or
power fuse before removing, installing, or touching the xenon
headlamp (including lamp bulb).

Turn the lighting switch OFF before disconnecting and connect-
ing the connector.

When turning the xenon headlamp on and while it is illuminated,
never touch the harness, bulb, and socket of the headlamp.

When checking the headlamp on/off operation, check it on vehi-
cle and with the power connected to the vehicle-side connector.

Do not touch the headlamp bulb glass surface with bare hands or allow oil or grease to get on it. Do not
touch the headlamp bulb just after the headlamp is turned off, because it is very hot.

Install the xenon headlamp bulb socket correctly. If it is installed
improperly, high-voltage leak or corona discharge may occur
that can melt the bulb, connector, and housing. Do not illuminate
the xenon headlamp bulb out of the headlamp housing. Doing
so can cause fire and harm your eyes.

When the bulb has burned out, wrap it in a thick vinyl bag and
discard. Do not break the bulb.

Leaving the bulb removed from the headlamp housing for a long
period of time can deteriorate the performance of the lens and
reflector (dirt, clouding). Always prepare a new bulb and have it
on hand when replacing the bulb.

Do not use organic solvent (paint thinner or gasoline) to clean
lamps and to remove old sealant.
WKIA0460E
EL-3422D

TURN SIGNAL AND HAZARD WARNING LAMPSLT-87
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Revision: November 2009 2006 QX56
Terminals and Reference Values for BCMEKS00B9T
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 ON Lighting, turn, wiper OFF
Wiper dial position 4
3 G/Y Combination switch input 4 ON Lighting, turn, wiper OFF
Wiper dial position 4
4 Y Combination switch input 3 ON Lighting, 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
29 W/B Hazard switch signal OFFHazard
switch ON
0V
OFF 5V
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
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E
SKIA5291E
SKIA5292E

LT-88
TURN SIGNAL AND HAZARD WARNING LAMPS
Revision: November 20092006 QX56
How to Proceed With Trouble DiagnosisEKS00B9U
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT- 8 0 , "
System Description" .
3. Perform preliminary check. Refer to LT- 8 9 , "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Do turn signal and hazard warning lamps operate normally? If YES: GO TO 6. If NO: GO TO 4.
6. Inspection End.
34 L Combination switch output 3 ON Lighting, turn, wiper OFF
Wiper dial position 4
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 —— —
60 G/B Turn signal (left) ONCombination
switch Turn left ON
61 G/Y Turn signal (right) ONCombination
switch Turn right ON
67 B Ground ON— 0V
70 W/B Battery power supply OFF— Battery voltage
Terminal
No. Wire
color Signal name Measuring condition
Reference value
(Approx.)
Ignition
switch Operation or condition
SKIA5291E
SKIA5292E
SKIA3009J
SKIA3009J

TURN SIGNAL AND HAZARD WARNING LAMPSLT-91
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Revision: November 2009 2006 QX56
4. Touch "FLASHER" on "SELECT TEST ITEM" screen.
DATA MONITOR
Operation Procedure
1. Touch "FLASHER" on "SELECT TEST ITEM" screen.
2. Touch "DATA MONITOR" on "SELECT DIAG MODE" screen.
3. Touch either "ALL SIGNALS" or "SELECTION FROM MENU" on the "SELECT MONITOR ITEM" screen.
4. Touch "START".
5. When "SELECTION FROM MENU" is selected, touch items to be monitored. When "ALL SIGNALS" is
selected, all the items will be monitored.
6. Touch "RECORD" while monitoring, then the status of the monitored item can be recorded. To stop recording, touch "STOP".
Display Item List
ACTIVE TEST
Operation Procedure
1. Touch "FLASHER" on "SELECT TEST ITEM" screen.
2. Touch "ACTIVE TEST" on "SELECT DIAG MODE" screen.
3. Touch item to be tested and check operation of the selected item.
4. During the operation check, touching "BACK" or "OFF" deactivates the operation.
Display Item List
LKIA0183E
ALL SIGNALS Monitors all the signals.
SELECTION FROM MENU Selects and monitors the individual signal.
Monitor item Contents
IGN ON SW "ON/OFF" Displays "IGN position (ON)/OFF, ACC position (OFF)" judged from the ignition switch signal.
HAZARD SW "ON/OFF" Displays "Hazard ON (ON)/Hazard OFF (OFF)" status, determined from hazard switch signal.
TURN SIGNAL R "ON/OFF" Displays "Turn right (ON)/Other (OFF)" status, determined from lighting switch signal.
TURN SIGNAL L "ON/OFF" Displays "Turn left (ON)/Other (OFF)" status, determined from lighting switch signal.
BRAKE SW "ON/OFF" Displays status of stop lamp switch.
Test item Description
FLASHER (RH) Turn signal lamp (right) can be operated by any ON-OFF operations.
FLASHER (LH) Turn signal lamp (left) can be operated by any ON-OFF operations.

LT-92
TURN SIGNAL AND HAZARD WARNING LAMPS
Revision: November 20092006 QX56
Front Turn Signal Lamp Does Not OperateEKS00B9X
1. CHECK COMBINATION SWITCH INPUT SIGNAL
With CONSULT-II
Select "BCM" on CONSULT-II. With "FLASHER" data monitor, make
sure "TURN SIGNAL R" and "TURN SIGNAL L" 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 "FLASHER" during active test. Refer to LT- 9 1 , "
ACTIVE
TEST" .
2. Make sure "FLASHER RH" and "FLASHER LH" operate.
Without CONSULT-II
GO TO 3.
OK or NG
OK >> Replace BCM. Refer to BCS-20, "BCM" .
NG >> GO TO 3.
3. CHECK TURN SIGNAL LAMPS CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector and front turn/fog lamp LH and RH connectors.
3. Check continuity between BCM harness connector M20 terminal 60 and front turn/fog lamp LH harness connector E101 terminal
2.
4. Check continuity between BCM harness connector M20 terminal 61 (G/Y) and front turn/fog lamp RH harness connector E102
terminal 2 (G/Y).
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector. When lighting switch is in
TURN RH position
: TURN SIGNAL R ON
When lighting switch is in
TURN LH position : TURN SIGNAL L ON
SKIA4499E
SKIA6190E
60 - 2
: Continuity should exist.
61 - 2 : Continuity should exist.
WKIA1890E

TURN SIGNAL AND HAZARD WARNING LAMPSLT-93
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4. CHECK GROUND
1. Check continuity between front turn/fog lamp LH harness con- nector E101 terminal 3 and ground.
2. Check continuity between front turn/fog lamp RH harness con- nector E102 terminal 3 and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.
5. CHECK BULB
Check bulb standard of each turn signal lamp is correct. Refer to LT- 1 7 5 , "
Exterior Lamp" .
OK or NG
OK >> Replace BCM if turn signal lamps do not work after setting the connector again. Refer to BCS-20,
"BCM" .
NG >> Replace turn signal lamp bulb. Refer to LT- 3 1 , "
FRONT PARKING LAMP (INNER OR
OUTER)"LT- 3 1 , "FRONT PARKING LAMP (INNER OR OUTER)" .
Door Mirror Turn Signal Lamp Does Not OperateEKS00GGS
1. CHECK COMBINATION SWITCH INPUT SIGNAL
With CONSULT-II
Select "BCM" on CONSULT-II. With "FLASHER" data monitor, make
sure "TURN SIGNAL R" and "TURN SIGNAL L" 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 "FLASHER" during active test. Refer to LT- 9 1 , "
ACTIVE
TEST" .
2. Make sure "FLASHER RH" and "FLASHER LH" operate.
Without CONSULT-II
GO TO 3.
OK or NG
OK >> Replace BCM. Refer to BCS-20, "REMOVAL AND
INSTALLATION" .
NG >> GO TO 3. 3 - Ground
: Continuity should exist.
3 - Ground : Continuity should exist.
WKIA1891E
When lighting switch is in
TURN RH position : TURN SIGNAL R ON
When lighting switch is in
TURN LH position : TURN SIGNAL L ON
SKIA4499E
SKIA6190E

PG-62
HARNESS
Revision: November 20092006 QX56
Wiring Diagram Codes (Cell Codes)EKS00BNE
Use the chart below to find out what each wiring diagram code stands for.
Refer to the wiring diagram code in the alphabetical index to find the location (page number) of each wiring
diagram.
CodeSection Wiring Diagram Name
A/C,A ATC Auto Air Conditioner
A/SUSP RSU Rear Air Suspension
AF1B1 EC Air Fuel Ratio (A/F) Sensor 1 (Bank 1)
AF1B2 EC Air Fuel Ratio (A/F) Sensor 1 (Bank 2)
AF1HB1 EC Air Fuel Ratio (A/F) Sensor 1 (Bank 1)
AF1HB2 EC Air Fuel Ratio (A/F) Sensor 1 (Bank 2)
APPS1 EC Accelerator Pedal Position Sensor
APPS2 EC Accelerator Pedal Position Sensor
APPS3 EC Accelerator Pedal Position Sensor
ASC/BS EC ASCD Brake Switch
ASC/SW EC ASCD Steering Switch
ASCBOF EC ASCD Brake Switch
ASCIND EC ASCD Indicator
A/T AT A/T Assembly
AT/IND DI A/T Indicator Lamp
AUDIO AV Audio
AUT/DP SE Automatic Drive Positioner
AUTO/L LT Auto Light Control
B/CLOS BL Back Door Auto Closure System
BACK/L LT Back-up Lamp
BRK/SW EC Brake Switch
CAN EC CAN Communication Line
CAN LAN CAN System
CHARGE SC Charging System
CHIME DI Warning Chime
CLOCK DI Clock
COOL/F EC Cooling Fan Control
COMBSW LT Combination Switch
COMM AV Audio Visual Communication System
COMPAS DI Compass and Thermometer
D/LOCK BL Power Door Lock
DEF GW Rear Window Defogger
DTRL LT Headlamp - With Daytime Light System
DVD AV DVD Entertainment System
ECM/PW EC ECM Power Supply for Back-Up
ECTS EC Engine Coolant Temperature Sensor
ETC1 EC Electric Throttle Control Function
ETC2 EC Throttle Control Motor Relay
ETC3 EC Throttle Control Motor
F/FOG LT Front Fog Lamp
F/PUMP EC Fuel Pump
FTTS EC Fuel Tank Temperature Sensor
FUELB1 EC Fuel Injection System Bank 1
FUELB2 EC Fuel Injection System Bank 2
H/AIM LT Headlamp Aiming Control
H/PHON AV Hands Free Telephone
H/LAMP LT Headlamp