sensor INFINITI QX4 2005 Factory Service Manual

BRC-62
[VDC/TCS/ABS]
ON-VEHICLE SERVICE
Revision: October 20052005 QX56
ON-VEHICLE SERVICEPFP:00000
Adjustment of Steering Angle Sensor Neutral PositionEFS004YH
After removing/installing or replacing ABS actuator and electric unit (control unit), steering angle sensor, steer-
ing and suspension components which affect wheel alignment or after adjusting wheel alignment, be sure to
adjust neutral position of steering angle sensor before running vehicle.
NOTE:
Adjustment of steering angle sensor neutral position requires CONSULT-II.
1. Stop vehicle with front wheels in straight-ahead position.
2. Connect CONSULT-II and CONSULT-II CONVERTER to data
link connector on vehicle, and turn ignition switch ON (do not
start engine).
3. Touch “ABS”, “WORK SUPPORT” and “ST ANGLE SENSOR
ADJUSTMENT” on CONSULT-II screen in this order.
4. Touch “START”.
CAUTION:
Do not touch steering wheel while adjusting steering angle
sensor.
5. After approximately 10 seconds, touch “END”. (After approxi-
mately 60 seconds, it ends automatically.)
6. Turn ignition switch OFF, then turn it ON again.
7. Run vehicle with front wheels in straight-ahead position, then
stop.
8. Select “DATA MONITOR”, “SELECTION FROM MENU”, and
“STR ANGLE SIG” on CONSULT-II screen. Then check that
“STR ANGLE SIG” is within 0±3.5 deg. If value is more than specification, repeat steps 1 to 5.
9. Erase memory of ABS actuator and electric unit (control unit) and ECM.
10. Turn ignition switch to OFF.
Calibration of Decel G SensorEFS004YI
After removing/installing or replacing ABS actuator and electric unit (control unit), yaw rate/side/decel G sen-
sor, steering and suspension components which affect wheel alignment or after adjusting wheel alignment, be
sure to calibrate the decel G sensor before running vehicle.
NOTE:
Calibration of decel G sensor requires CONSULT-II.
1. Stop vehicle with front wheels in straight-ahead position.
CAUTION:

The work should be done on a level area with an unloaded vehicle.

Keep all the tires inflated to the correct pressures. Adjust the tire pressure to the specified pres-
sure value.
2. Connect CONSULT-II with CONSULT-II CONVERTER to data link connector on vehicle, and turn ignition
switch ON (do not start engine).
CAUTION:
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.
3. Touch "ABS", "WORK SUPPORT" and "DECEL G SEN CALIBRATION" on CONSULT-II screen in this
order. Refer to BRC-28, "
CONSULT-II BASIC OPERATION PROCEDURE" .
BBIA0369E
WFIA0239E

BRC-64
[VDC/TCS/ABS]
WHEEL SENSORS
Revision: October 20052005 QX56
WHEEL SENSORSPFP:47910
Removal and InstallationEFS004YJ
REMOVAL
1. Remove wheel sensor mounting screw.

When removing the front wheel sensor, first remove the disc rotor to gain access to the front wheel sen-
sor mounting bolt. Refer to BR-21, "
Removal and Installation of Brake Caliper Assembly and Disc
Rotor" .

When removing the rear wheel sensor, first remove the rear hub and bearing assembly to gain access
to the rear wheel sensor mounting bolt. Refer to RAX-5, "
Removal and Installation" .
2. Pull out the sensor, being careful to turn it as little as possible.
CAUTION:

Do not pull on the sensor harness.
3. Disconnect wheel sensor harness electrical connector, then remove harness from mounts.
INSTALLATION
Installation is in the reverse order of removal. Tighten wheel sensor bolt to the specified torque.
CAUTION:
Installation should be performed while paying attention to the following.

Inspect wheel sensor O-ring, replace sensor assembly if damaged.

Before installing wheel sensor, make sure no foreign materials (such as iron fragments) are
adhered to the pick-up part of the sensor, to the inside of the sensor mounting hole or on the rotor
mounting surface.

Apply a coat of suitable grease to the wheel sensor O-ring and mounting hole.
WFIA0376E

SENSOR ROTOR
BRC-65
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: October 20052005 QX56
SENSOR ROTORPFP:47970
Removal and Installation EFS004YK
NOTE:
The wheel sensor rotors are built into the wheel hubs and are not removable. If damaged, replace wheel hub
and bearing assembly. Refer to FAX-5, "
Removal and Installation" (Front), RAX-5, "Removal and Installation"
(Rear).

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
BRC-67
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: October 20052005 QX56
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
To install, use a flare nut wrench (commercial service tool).

Always tighten brake tubes to specification when installing. Refer to BR-11, "BRAKE PIPING AND
HOSE" .

Never reuse drained brake fluid.

After installation of the ABS actuator and electric unit (control unit), perform the following.
–Refill brake system with new brake fluid. Then bleed the air from the system. Refer to BR-10,
"Bleeding Brake System" .
–Adjust the steering angle sensor. Refer to BRC-62, "Adjustment of Steering Angle Sensor Neutral
Position" .
–Calibrate the decel G sensor. Refer to BRC-62, "Calibration of Decel G Sensor" .

BRC-68
[VDC/TCS/ABS]
STEERING ANGLE SENSOR
Revision: October 20052005 QX56
STEERING ANGLE SENSORPFP:25554
Removal and InstallationEFS004YM
NOTE:
The steering angle sensor is an integral part of the spiral cable.
Refer to SRS-48, "
Removal and Installation" .

G SENSOR
BRC-69
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: October 20052005 QX56
G SENSORPFP:47930
Removal and InstallationEFS004YN
REMOVAL
1. Remove center console. Refer to IP-10, "Removal and Installation" .
2. Remove yaw rate/side/decel G sensor attaching nuts.
CAUTION:

Do not use power tools to remove or install yaw rate/side/
decel G sensor.

Do not drop or strike the yaw rate/side/decel G sensor.
3. Disconnect harness connector and remove the yaw rate/side/
decel G sensor.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:

Do not drop or strike the yaw rate/side/decel G sensor.

After installation, calibrate the decel G sensor. Refer to BRC-62, "Calibration of Decel G Sensor" .
WFIA0230E

BRC-70
[VDC/TCS/ABS]
G SENSOR
Revision: October 20052005 QX56

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

DI-6
COMBINATION METERS
Revision: October 20052005 QX56
POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times

through 10A fuse [No.19, located in the fuse block (J/B)]

to combination meter terminal 8.
With the ignition switch in the ON or START position, power is supplied

through 10A fuse [No.14, located in the fuse block (J/B)]

to combination meter terminal 24.
With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No.4, located in the fuse block (J/B)]

to combination meter terminal 1.
Ground is supplied

to combination meter terminal 17

through body grounds M57, M61 and M79.
WATER TEMPERATURE GAUGE
The water temperature gauge indicates the engine coolant temperature.
ECM provides an engine coolant temperature signal to combination meter via CAN communication lines.
ENGINE OIL PRESSURE GAUGE
The engine oil pressure gauge indicates the engine oil pressure.
The engine oil pressure gauge is regulated by the unified meter control unit and input from the oil pressure
sensor.
A/T OIL TEMPERATURE GAUGE
The A/T oil temperature gauge indicates the A/T fluid temperature.
TCM (transmission control module) provides an A/T fluid temperature signal to combination meter via CAN
communication lines.
V O LTA G E G A U G E
The voltage gauge indicates the battery/charging system voltage.
The voltage gauge is regulated by the unified meter control unit.
TACHOMETER
The tachometer indicates engine speed in revolutions per minute (rpm).
ECM provides an engine speed signal to combination meter via CAN communication lines.
FUEL GAUGE
The fuel gauge indicates the approximate fuel level in the fuel tank.
The fuel gauge is regulated by the unified meter control unit and a variable resistor signal supplied

to combination meter terminal 15

through fuel level sensor unit and fuel pump terminal 2

through fuel level sensor unit and fuel pump terminal 5

from combination meter terminal 16.
SPEEDOMETER
ABS actuator and electric unit (control unit) provides a vehicle speed signal to the combination meter via CAN
communication lines.
CAN COMMUNICATION SYSTEM DESCRIPTION
Refer to LAN-5, "CAN COMMUNICATION" .