2005 INFINITI QX4 diagram

BL-146
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: October 20052005 QX56
SYMPTOM MATRIX CHART 2
Non self-diagnosis related item
*: CONSULT-II self-diagnostic results display screen “no malfunction is detected”.
DIAGNOSTIC SYSTEM DIAGRAM
SymptomDiagnostic Procedure
(Reference page)System
(Malfunctioning part or mode)Reference Part No. Of Illustra-
tion On System Diagram
Security indicator does not light
up*.PROCEDURE 6
(BL-154
)Combination meter (security
indictor lamp)—
Open circuit between fuse and
BCM—
BCM A
WIIA0550E

BL-156
HOMELINK UNIVERSAL TRANSCEIVER
Revision: October 20052005 QX56
HOMELINK UNIVERSAL TRANSCEIVERPFP:96401
Wiring Diagram — TRNSCV —EIS008SC
WIWA0759E

BRC-1
BRAKE CONTROL SYSTEM
F BRAKES
CONTENTS
C
D
E
G
H
I
J
K
L
M
SECTION BRC
A
B
BRC
Revision: October 20052005 QX56VDC/TCS/ABS
PRECAUTIONS .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Precautions for Brake System .................................. 3
Precautions When Using CONSULT-II ..................... 3
CHECK POINTS FOR USING CONSULT-II ......... 3
Precautions for Brake Control .................................. 4
Precautions for CAN System ................................... 4
Wiring Diagrams and Trouble Diagnosis .................. 5
PREPARATION ........................................................... 6
Special Service Tool ................................................. 6
Commercial Service Tools ........................................ 6
SYSTEM DESCRIPTION ............................................ 7
System Components ................................................ 7
ABS Function ........................................................... 8
EBD Function ........................................................... 8
TCS Function ........................................................... 8
VDC Function ........................................................... 8
Fail-Safe Function .................................................... 8
ABS/EBD SYSTEM ............................................... 9
VDC/TCS SYSTEM ............................................... 9
ACTIVE BOOSTER ............................................... 9
Hydraulic Circuit Diagram ........................................ 9
CAN COMMUNICATION .......................................... 10
System Description ................................................ 10
TROUBLE DIAGNOSIS .............................................11
How to Perform Trouble Diagnoses for Quick and
Accurate Repair ......................................................11
INTRODUCTION ..................................................11
WORK FLOW ...................................................... 12
CLARIFY CONCERN .......................................... 13
EXAMPLE OF DIAGNOSIS SHEET ................... 13
Component Parts and Harness Connector Location ... 14
Schematic .............................................................. 15
Wiring Diagram — VDC — ..................................... 16
Basic Inspection ..................................................... 23
BRAKE FLUID LEVEL, FLUID LEAK, AND
BRAKE PAD INSPECTION ................................. 23POWER SYSTEM TERMINAL LOOSENESS
AND BATTERY INSPECTION ............................. 23
ABS WARNING LAMP, SLIP INDICATOR LAMP
AND VDC OFF INDICATOR LAMP INSPECTION ... 23
Warning Lamp and Indicator Timing ....................... 24
Control Unit Input/Output Signal Standard ............. 24
REFERENCE VALUE FROM CONSULT-II ......... 24
CONSULT-II Function (ABS) .................................. 28
CONSULT-II BASIC OPERATION PROCEDURE
... 28
SELF-DIAGNOSIS .............................................. 29
DATA MONITOR ................................................. 32
ACTIVE TEST ..................................................... 36
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC
ITEMS ........................................................................ 38
Wheel Sensor System Inspection ........................... 38
Engine System Inspection ...................................... 39
ABS/TCS/VDC Control Unit Inspection .................. 40
Steering Angle Sensor System ............................... 41
Yaw Rate/Side/Decel G Sensor System Inspection ... 42
Solenoid and VDC Change-Over Valve System
Inspection ............................................................... 43
Actuator Motor, Motor Relay, and Circuit Inspection ... 44
Stop Lamp Switch System Inspection .................... 45
ABS/TCS/VDC Control Unit Power and Ground
Systems Inspection ................................................ 46
Brake Fluid Level Sensor System Inspection ......... 47
Active Booster System Inspection .......................... 49
Delta Stroke Sensor System Inspection ................. 50
Pressure Sensor System Inspection ...................... 51
Steering Angle Sensor Safe Mode Inspection ........ 54
CAN Communication System Inspection ................ 55
Inspection For Self-diagnosis Result "ST ANGLE
SEN SIGNAL" ......................................................... 55
Inspection For Self-diagnosis Result "DECEL G
SEN SET" ............................................................... 55
VDC OFF Indicator lamp Does Not Illuminate ........ 56
Component Inspection ............................................ 56
VDC OFF SWITCH ............................................. 56

PRECAUTIONS
BRC-5
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: October 20052005 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 EFS004X8
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

SYSTEM DESCRIPTION
BRC-9
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: October 20052005 QX56
ABS/EBD SYSTEM
In case of an electrical malfunction with the ABS, the ABS warning lamp, VDC OFF indicator lamp and SLIP
indicator lamp will turn on. In case of an electrical malfunction with the EBD system, the BRAKE warning lamp,
ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp will turn on.
The system will revert to one of the following conditions of the Fail-Safe function.
1. For ABS malfunction, only the EBD is operative and the condition of the vehicle is the same condition of
vehicles without ABS/TCS/VDC system.
2. For EBD malfunction, the EBD and ABS become inoperative, and the condition of the vehicle is the same
as the condition of vehicles without ABS/TCS/VDC or EBD system.
VDC/TCS SYSTEM
In case of TCS/VDC system malfunction, the VDC OFF indicator lamp and SLIP indicator lamp are turned on
and the condition of the vehicle is the same as the condition of vehicles without TCS/VDC system. In case of
an electrical malfunction with the TCS/VDC system, the ABS control continues to operate normally without
TCS/VDC control.
ACTIVE BOOSTER
The active brake booster consists of a vacuum booster, an active booster control group and a delta stroke
sensor. In case of brake booster system malfunction due to loss of vacuum, the delta stroke sensor will signal
the ABS actuator and electric unit (control unit) that a booster failure has occurred. The active booster then
applies supplemental force to the master cylinder relative to the amount of force exerted on the brake pedal.
Hydraulic Circuit DiagramEFS004XH
WFIA0187E

BRC-16
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
Wiring Diagram — VDC —EFS004XM
WFWA0183E

DI-1
DRIVER INFORMATION SYSTEM
K ELECTRICAL
CONTENTS
C
D
E
F
G
H
I
J
L
M
SECTION DI
A
B
DI
Revision: October 20052005 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 ........................................................... 29
WARNING LAMPS .................................................... 30
Schematic ............................................................... 30
Wiring Diagram — WARN — .................................. 31
Oil Pressure Warning Lamp Stays Off (Ignition
Switch ON) ............................................................. 37
Oil Pressure Warning Lamp Does Not Turn Off (Oil
Pressure Is Normal) ................................................ 39
A/T INDICATOR ........................................................ 40
Wiring Diagram — AT/IND — ................................. 40
A/T Indicator Does Not Illuminate ........................... 41
WARNING CHIME ..................................................... 42
Component Parts and Harness Connector Location ... 42
System Description ................................................. 42
FUNCTION .......................................................... 42
IGNITION KEY WARNING CHIME ..................... 43
LIGHT WARNING CHIME ................................... 43
SEAT BELT WARNING CHIME ........................... 43

DI-2Revision: October 20052005 QX56 CAN Communication System Description .............. 43
Wiring Diagram — CHIME — ................................. 44
Terminals and Reference Value for BCM ................ 46
Terminals and Reference Value for Combination
Meter ...................................................................... 47
How to Proceed With Trouble Diagnosis ................ 47
Preliminary Check .................................................. 47
INSPECTION FOR POWER SUPPLY AND
GROUND CIRCUIT ............................................. 47
CONSULT-II Function (BCM) .................................. 49
CONSULT-II BASIC OPERATION PROCEDURE
... 49
DATA MONITOR .................................................. 50
ACTIVE TEST ..................................................... 50
SELF-DIAGNOSTIC RESULTS ........................... 51
All Warning Chimes Do Not Operate ...................... 51
Key Warning Chime and Light Warning Chime Do
Not Operate (Seat Belt Warning Chime Does Oper-
ate) ......................................................................... 52
Key Warning Chime Does Not Operate .................. 53
Light Warning Chime Does Not Operate ................ 55
Seat Belt Warning Chime Does Not Operate ......... 56
REAR SONAR SYSTEM ........................................... 58
Component Parts and Harness Connector Location ... 58
System Description ................................................. 59
FUNCTION .......................................................... 59
REAR SONAR SYSTEM OFF SWITCH .............. 59
SONAR BUZZER ................................................ 59
REAR SONAR SENSOR ..................................... 60
Wiring Diagram — SONAR — ................................ 61
Terminals And Reference Value For Sonar Control
Unit ......................................................................... 63
How to Proceed With Trouble Diagnosis ................ 63
Pre-diagnosis Inspection ........................................ 64
SENSOR STATUS CHECK ................................. 64
Self-diagnosis Function .......................................... 64
ENTERING DIAGNOSTICS MODE .................... 64
REQUESTING NUMBER OF FAULT CODES
MODE .................................................................. 64
REQUESTING FAULT CODES MODE ............... 65
IDLING OR CLEARING FAULT CODES MODE ... 65
Preliminary Check .................................................. 66INSPECTION FOR POWER SUPPLY AND
GROUND CIRCUIT .............................................66
Symptom Chart .......................................................67
Component Inspection ............................................68
SONAR BUZZER .................................................68
REAR SONAR SYSTEM OFF SWITCH ..............68
REAR SONAR SYSTEM OFF INDICATOR .........68
Removal and Installation of Rear Sonar System ....68
REAR SONAR SENSORS ...................................68
SONAR CONTROL UNIT ....................................68
CLOCK ......................................................................69
Wiring Diagram — CLOCK — .................................69
Removal and Installation of Clock ...........................70
REMOVAL ............................................................70
INSTALLATION ....................................................70
REAR VIEW MONITOR .............................................71
Component Parts and Harness Connector Location ...71
System Description .................................................72
POWER SUPPLY AND GROUND .......................72
AV COMMUNICATION LINE ...............................72
REAR VIEW CAMERA OPERATION ..................72
Schematic ...............................................................73
Wiring Diagram — R/VIEW — ................................74
Terminals and Reference Value for Rear View Cam-
era Control Unit .......................................................77
CONSULT-II Function (REARVIEW CAMERA) ......78
CONSULT-II BASIC OPERATION .......................78
WORK SUPPORT ...............................................79
DATA MONITOR ..................................................79
Side Distance Guideline Correction ........................80
SIDE DISTANCE GUIDELINE CORRECTION
PROCEDURE ......................................................80
Power Supply and Ground Circuit Inspection .........82
Rear View Is Not Displayed With The A/T Selector
Lever In R Position ..................................................83
Removal and Installation of Rear View Camera Con-
trol Unit ....................................................................87
REMOVAL ............................................................87
INSTALLATION ....................................................87
Removal and Installation of Rear View Camera .....87
REMOVAL ............................................................87
INSTALLATION ....................................................87