2004 INFINITI QX56 wiring diagram

PRECAUTIONS
BRC-5
[VDC/TCS/ABS]
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BRC
Revision: August 20072004 QX56

Area to be repaired must be soldered and wrapped with tape.
Make sure that fraying of twisted wire is within 110 mm (4.33 in).

Do not make a bypass connection to repaired area. (If the circuit
is bypassed, characteristics of twisted wire will be lost.)
Wiring Diagrams and Trouble Diagnosis EF S0 03 QF
When you read wiring diagrams, refer to the following:

GI-15, "How to Read Wiring Diagrams".

PG-4, "POWER SUPPLY ROUTING CIRCUIT".
When you perform trouble diagnosis, refer to the following:

GI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES".

GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident".
PKIA0306E
PKIA0307E

BRC-16
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
Wiring Diagram — VDC —EFS003QT
WFWA0289E

DI-1
DRIVER INFORMATION SYSTEM
K ELECTRICAL
CONTENTS
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SECTION DI
A
B
DI
Revision: August 20072004 QX56 PRECAUTION ............................................................ 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Wiring Diagrams and Trouble Diagnosis .................. 3
PREPARATION ........................................................... 4
Commercial Service Tool ......................................... 4
COMBINATION METERS ........................................... 5
System Description .................................................. 5
UNIFIED METER CONTROL UNIT ...................... 5
POWER SUPPLY AND GROUND CIRCUIT ........ 6
WATER TEMPERATURE GAUGE ........................ 6
ENGINE OIL PRESSURE GAUGE ....................... 6
A/T OIL TEMPERATURE GAUGE ........................ 6
VOLTAGE GAUGE ................................................ 6
TACHOMETER ..................................................... 6
FUEL GAUGE ....................................................... 6
SPEEDOMETER ................................................... 6
CAN COMMUNICATION SYSTEM DESCRIP-
TION ...................................................................... 6
Component Parts and Harness Connector Location ..... 7
Combination Meter ................................................... 8
CHECK .................................................................. 8
Circuit Diagram ........................................................ 9
Wiring Diagram — METER — ................................ 10
Terminals and Reference Value for Combination
Meter ...................................................................... 12
Meter/Gauge Operation and Odo/Trip Meter ......... 13
SELF-DIAGNOSIS FUNCTION .......................... 13
HOW TO INITIATE COMBINATION METER
SELF- DIAGNOSIS MODE ................................. 13
COMBINATION METER SELF-DIAGNOSIS
MODE FUNCTIONS ........................................... 13
How to Proceed With Trouble Diagnosis ................ 17
Diagnosis Flow ....................................................... 17
Power Supply and Ground Circuit Inspection ........ 18
Symptom Chart ...................................................... 19
Vehicle Speed Signal Inspection ............................ 19
Engine Oil Pressure Signal Inspection ................... 19
Water Temperature Signal Inspection .................... 21Engine Speed Signal Inspection ............................. 21
Fuel Level Sensor Unit Inspection .......................... 22
FUEL LEVEL SENSOR UNIT ............................. 22
LOW-FUEL WARNING LAMP ............................. 22
Fuel Gauge Fluctuates, Indicates Wrong Value, or
Varies ...................................................................... 24
Fuel Gauge Does Not Move to Full-position ........... 24
Electrical Components Inspection .......................... 25
FUEL LEVEL SENSOR UNIT CHECK ................ 25
Removal and Installation of Combination Meter ..... 25
COMPASS AND THERMOMETER ........................... 26
System Description ................................................. 26
OUTSIDE TEMPERATURE DISPLAY ................. 26
DIRECTION DISPLAY ......................................... 26
Wiring Diagram — COMPAS — ............................. 27
Trouble Diagnoses ................................................. 28
PRELIMINARY CHECK FOR THERMOMETER ... 28
INSPECTION/COMPASS AND THERMOME-
TER ..................................................................... 28
Calibration Procedure for Compass ....................... 29
CORRECTION FUNCTIONS OF COMPASS ...... 29
INITIAL CORRECTION PROCEDURE FOR
COMPASS ........................................................... 30
WARNING LAMPS .................................................... 31
Schematic ............................................................... 31
Wiring Diagram — WARN — .................................. 32
Oil Pressure Warning Lamp Stays Off (Ignition
Switch ON) ............................................................. 38
Oil Pressure Warning Lamp Does Not Turn Off (Oil
Pressure Is Normal) ................................................ 40
A/T INDICATOR ........................................................ 41
Wiring Diagram — AT/IND — ................................. 41
A/T Indicator Does Not Illuminate ........................... 42
WARNING CHIME ..................................................... 43
Component Parts and Harness Connector Location ... 43
System Description ................................................. 44
FUNCTION .......................................................... 44
IGNITION KEY WARNING CHIME ..................... 44
LIGHT WARNING CHIME ................................... 44
SEAT BELT WARNING CHIME ........................... 44

DI-2Revision: August 20072004 QX56 CAN Communication System Description .............. 45
Wiring Diagram — CHIME — ................................. 46
Terminals and Reference Value for BCM ................ 48
Terminals and Reference Value for Combination
Meter ...................................................................... 49
How to Proceed With Trouble Diagnosis ................ 49
Preliminary Check .................................................. 49
INSPECTION FOR POWER SUPPLY AND
GROUND CIRCUIT ............................................. 49
CONSULT-II Function (BCM) .................................. 51
CONSULT-II BASIC OPERATION PROCEDURE
... 51
DATA MONITOR .................................................. 52
ACTIVE TEST ..................................................... 52
SELF-DIAGNOSTIC RESULTS ........................... 52
All Warning Chimes Do Not Operate ...................... 53
Key Warning Chime and Light Warning Chime Do
Not Operate (Seat Belt Warning Chime Does Oper-
ate) ......................................................................... 53
Key Warning Chime Does Not Operate .................. 54
Light Warning Chime Does Not Operate ................ 56
Seat Belt Warning Chime Does Not Operate ......... 57
REAR SONAR SYSTEM ........................................... 59
Component Parts and Harness Connector Location ... 59
System Description ................................................. 60
FUNCTION .......................................................... 60
REAR SONAR SYSTEM OFF SWITCH .............. 60
SONAR BUZZER ................................................ 60
REAR SONAR SENSOR ..................................... 61
Wiring Diagram — SONAR — ................................ 62
Terminals And Reference Value For Sonar Control
Unit ......................................................................... 64
How to Proceed With Trouble Diagnosis ................ 64
Pre-diagnosis Inspection ........................................ 65
SENSOR STATUS CHECK ................................. 65
Self-diagnosis Function .......................................... 65
ENTERING DIAGNOSTICS MODE .................... 65
REQUESTING NUMBER OF FAULT CODES
MODE .................................................................. 65
REQUESTING FAULT CODES MODE ............... 66
IDLING OR CLEARING FAULT CODES MODE ... 66
Preliminary Check .................................................. 67INSPECTION FOR POWER SUPPLY AND
GROUND CIRCUIT .............................................67
Symptom Chart .......................................................68
Component Inspection ............................................69
SONAR BUZZER .................................................69
REAR SONAR SYSTEM OFF SWITCH ..............69
REAR SONAR SYSTEM OFF INDICATOR .........69
Removal and Installation of Rear Sonar System ....69
REAR SONAR SENSORS ...................................69
SONAR CONTROL UNIT ....................................69
CLOCK ......................................................................70
Wiring Diagram — CLOCK — .................................70
Removal and Installation of Clock ...........................71
REMOVAL ............................................................71
INSTALLATION ....................................................71
REAR VIEW MONITOR .............................................72
System Description .................................................72
POWER SUPPLY AND GROUND .......................72
AV COMMUNICATION LINE ...............................72
REAR VIEW CAMERA OPERATION ..................72
Component Parts and Harness Connector Location ...73
Schematic ...............................................................74
Wiring Diagram — R/VIEW — ................................75
Terminals and Reference Value for Rear View Cam-
era Control Unit .......................................................78
CONSULT-II Function (REARVIEW CAMERA) ......79
CONSULT-II BASIC OPERATION .......................79
WORK SUPPORT ...............................................80
DATA MONITOR ..................................................80
Side Distance Guideline Correction ........................81
SIDE DISTANCE GUIDELINE CORRECTION
PROCEDURE ......................................................81
Power Supply and Ground Circuit Inspection .........83
Rear View Is Not Displayed With The A/T Selector
Lever In R Position ..................................................84
Removal and Installation of Rear View Camera Con-
trol Unit ....................................................................88
REMOVAL ............................................................88
INSTALLATION ....................................................88
Removal and Installation of Rear View Camera .....88
REMOVAL ............................................................88
INSTALLATION ....................................................88

PRECAUTION
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Revision: August 20072004 QX56
PRECAUTION PFP:00011
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EKS007DI
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.
WA RN ING:

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.
Wiring Diagrams and Trouble Diagnosis EKS007DJ
When you read wiring diagrams, refer to the following:

Refer to GI-15, "How to Read Wiring Diagrams" .

Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT" for power distribution circuit.
When you perform trouble diagnosis, refer to the following:

Refer to GI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" .

Refer to GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident" .

DI-10
COMBINATION METERS
Revision: August 20072004 QX56
Wiring Diagram — METER —EKS007DP
WKWA3052E

DI-18
COMBINATION METERS
Revision: August 20072004 QX56
Power Supply and Ground Circuit InspectionEKS007DU
1. CHECK FUSES
Check for blown combination meter fuses.
Refer to DI-10, "Wiring Diagram — METER —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-
4, "POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect combination meter connector.
2. Check voltage between combination meter harness connector
terminals and ground.
OK or NG
OK >> GO TO 3.
NG >> Check the harness for open between combination meter and fuse.
3. CHECK GROUND CIRCUIT
Check continuity between combination meter harness connector ter-
minals and ground.
OK or NG
OK >> Inspection End.
NG >> Repair harness or connector.
Unit Power source Fuse No.
Combination meter Battery 19
Ignition switch ON or START 14
Ignition switch ACC or ON 4
Terminals Ignition switch position
(+)
(–) OFF ACC ON
ConnectorTe r m i n a l
(Wire color)
M241 (O)
Ground0VBattery
voltageBattery
voltage
8 (Y/R)Battery
voltageBattery
voltageBattery
voltage
24 (O/L) 0V 0VBattery
voltage
WKIA1815E
Te r m i n a l s
Continuity (+)
(–)
ConnectorTe r m i n a l
(Wire color)
M24 17 (B) Ground Yes
WKIA1526E

COMPASS AND THERMOMETER
DI-27
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Revision: August 20072004 QX56
Wiring Diagram — COMPAS —EKS007E5
WKWA3054E