2006 INFINITI QX56 sensor

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSBRC-53
[VDC/TCS/ABS]
C
DE
G H
I
J
K L
M A
B
BRC
Revision: November 2009 2006 QX56
3. REAR PRESSURE SENSOR CIRCUIT INSPECTION
1. Measure the continuity between the ABS actuator and electric unit (control unit) connector E125 and rear pressure sensor connector E32.
2. Measure the continuity between the ABS actuator and electric unit (control unit) connector E125 and body ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness or connector.
4. REAR PRESSURE SENSOR INSPECTION
1. Reconnect the rear pressure sensor and ABS actuator and electric unit (control unit) connectors.
2. Use "DATA MONITOR" to check if the status of "PRESS SEN 2" is normal.
OK or NG
OK >> Inspection End.
NG >> Replace rear pressure sensor.
Steering Angle Sensor Safe Mode InspectionEFS0068B
INSPECTION PROCEDURE
1. INDICATOR LAMP CHECK
Check that VDC OFF indicator lamp is on.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Adjust steering angle sensor neutral position. Refer to BRC-62, "
Adjustment of Steering Angle Sensor Neutral
Position" .
OK or NG
OK >> GO TO 3.
NG >> Check steering angle sensor. Refer to BRC-40, "
Steering Angle Sensor System" .
ABS actuator and electric unit
(control unit) connector E125 Rear pressure sensor con-
nector E32 Continuity
21 1
Yes
22 3
23 2
ABS actuator and electric unit (control unit) connector E125 Body ground
Continuity
21 —No
22
23
Condition Data monitor display (Approx.)
PRESS SEN 2
When brake pedal is depressed Positive value
When brake pedal is released 0 bar

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSBRC-55
[VDC/TCS/ABS]
C
DE
G H
I
J
K L
M A
B
BRC
Revision: November 2009 2006 QX56
3. ICC CONTROL UNIT CIRCUIT INSPECTION
1. Measure the continuity between ABS actuator and electric unit (control unit) connector E125 and ICC con- trol unit connector B13.
2. Measure the continuity between ABS actuator and electric unit (control unit) connector E125 and body ground.
OK or NG
OK >> Replace ABS actuator and electric unit (control unit). Refer to BRC-66, "Removal and Installation"
.
NG >> Repair or replace harness or connector.
Inspection For Self-diagnosis Result "ST ANG SEN SIGNAL"EFS004Y5
INSPECTION PROCEDURE
1. DISPLAY SELF-DIAGNOSIS RESULTS
Perform ABS actuator and electric unit (control unit) self-diagnosis.
Do self-diagnosis results indicate anything other than shown above?
YES >> Perform repair or replacement for the item indicated.
NO >> Perform adjustment of steering angle sensor neutral position. GO TO 2.
2. PERFORM SELF-DIAGNOSIS AGAIN
1. Turn the ignition switch to OFF and then to ON and erase self-diagnosis results.
2. Perform ABS actuator and electric unit (control unit) self-diagnosis again.
Are any self-diagnosis results displayed?
YES >> Replace steering angle sensor. Refer to BRC-68, "Removal and Installation" .
NO >> Inspection End.
Inspection For Self-diagnosis Result "DECEL G SEN SET"EFS004Y6
INSPECTION PROCEDURE
1. PERFORM SELF-DIAGNOSIS
Perform ABS actuator and electric unit (control unit) self-diagnosis.
Do self-diagnosis results indicate anything other than shown above?
YES >> Perform repair or replacement for the item indicated.
NO >> Perform calibration of yaw rate/side/decel G sensor. Refer to BRC-62, "
Calibration of Decel G
Sensor" . GO TO 2.
ABS actuator and electric unit
(control unit) connector E125 ICC control unit connector
B13 Continuity
71 0Yes
ABS actuator and electric unit (control unit) connector E125 Body ground
Continuity
7—N o
Self-diagnosis results
ST ANG SEN SIGNAL
Self-diagnosis results DECEL G SEN SET

BRC-56
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: November 20092006 QX56
2. PERFORM SELF-DIAGNOSIS AGAIN
1. Turn the ignition switch to OFF and then to ON and erase self-diagnosis results.
2. Perform ABS actuator and electric unit (control unit) self-diagnosis again.
Are any self-diagnosis results displayed?
YES >> Replace yaw rate/side/decel G sensor. Refer to BRC-69, "Removal and Installation" .
NO >> Inspection End.
VDC OFF Indicator lamp Does Not IlluminateEFS004Y7
INSPECTION PROCEDURE
1. CHECK VDC OFF INDICATOR LAMP
Disconnect ABS actuator and electric unit (control unit) connector E125.
Do the ABS warning lamp and VDC OFF indicator lamp illuminate?
YES >> Replace ABS actuator and electric unit (control unit). Refer to BRC-66, "Removal and Installation"
.
NO >> Replace combination meter. Refer to IP-13, "
COMBINATION METER" .
Component InspectionEFS004Y8
VDC OFF SWITCH
Check the continuity between terminals 1 and 2.
1 - 2 : Continuity should exist when pushing the switch.
Continuity should not exist when releasing
the switch.
PFIA0307E

TROUBLE DIAGNOSES FOR SYMPTOMSBRC-57
[VDC/TCS/ABS]
C
DE
G H
I
J
K L
M A
B
BRC
Revision: November 2009 2006 QX56
TROUBLE DIAGNOSES FOR SYMPTOMSPFP:99999
ABS Works FrequentlyEFS004Y9
1. CHECK WARNING LAMP ACTIVATION
Make sure warning lamp remains off while driving.
OK or NG
OK >> GO TO 2.
NG >> Carry out self-diagnosis. Refer to BRC-29, "
SELF-DIAGNOSIS" .
2. CHECK WHEEL SENSORS
Check the following.

Wheel sensor mounting for looseness

Wheel sensors for physical damage

Wheel sensor connectors for terminal damage or loose connections
OK or NG
OK >> GO TO 3.
NG >> Repair or replace as necessary.
3. CHECK FRONT AND REAR AXLES
Check front and rear axles for excessive looseness. Refer to FAX-5, "
WHEEL BEARING INSPECTION" or
RAX-5, "
WHEEL BEARING INSPECTION" .
OK or NG
OK >> GO TO 4.
NG >> Repair as necessary.
4. CHECK BRAKE FLUID PRESSURE
Check brake fluid pressure distribution.
Refer to BRC-23, "
Basic Inspection" .
Is brake fluid pressure distribution normal?
YES >> Inspection End.
NO >> Perform Basic Inspection. Refer to BRC-23, "
Basic Inspection" .

BRC-58
[VDC/TCS/ABS]
TROUBLE DIAGNOSES FOR SYMPTOMS
Revision: November 20092006 QX56
Unexpected Pedal ActionEFS004YA
1. CHECK WARNING LAMP ACTIVATION
Make sure warning lamp remains off while driving.
OK or NG
OK >> GO TO 2.
NG >> Carry out self-diagnosis. Refer to BRC-29, "
SELF-DIAGNOSIS" .
2. CHECK BRAKE PEDAL STROKE
Check brake pedal stroke.
Is pedal stroke excessive?
YES >> Perform Basic Inspection. Refer to BRC-23, "Basic
Inspection" .
NO >> GO TO 3.
3. CHECK CONNECTOR AND BRAKING PERFORMANCE
1. Disable ABS by disconnecting ABS actuator and electric unit (control unit) connector.
2. Drive vehicle and check brake operation. NOTE:

Stopping distance may be longer than vehicles without ABS when road condition is slippery.

Driving the vehicle with the ABS actuator and electric unit (control unit) disconnected may induce DTCs
in electrical control units using CAN communication. After the inspection, clear all DTCs. Refer to BRC-
10, "CAN COMMUNICATION" .
OK or NG
OK >> GO TO 4.
NG >> Perform Basic Inspection. Refer to BRC-23, "
Basic Inspection" .
4. CHECK WHEEL SENSORS
Check the following.

Wheel sensor mounting for looseness

Wheel sensors for physical damage

Wheel sensor connectors for terminal damage or loose connections
OK or NG
OK >> Check ABS actuator and electric unit (control unit) connector terminals for deformation, discon- nection, looseness or damage. Reconnect ABS actuator and electric unit (control unit) harness
connector. Then retest.
NG >> Repair or replace as necessary.
SBR540A

BRC-62
[VDC/TCS/ABS]
ON-VEHICLE SERVICE
Revision: November 20092006 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: November 20092006 QX56
WHEEL SENSORSPFP:47910
Removal and InstallationEFS0068D
REMOVAL
1. Remove wheel sensor bolt.

When removing the front wheel sensor, first remove the disc rotor to gain access to the front wheel sen-
sor bolt. Refer to BR-22, "
Removal and Installation of Brake Caliper 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 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 attaching points.
INSTALLATION
Installation is in the reverse order of removal. Tighten wheel sensor bolt to specification.
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 hole or on the rotor mating
surface.

Apply a coat of suitable grease to the wheel sensor O-ring and hole. Refer to MA-11, "RECOM-
MENDED FLUIDS AND LUBRICANTS" .
WFIA0376E

SENSOR ROTORBRC-65
[VDC/TCS/ABS]
C
DE
G H
I
J
K L
M A
B
BRC
Revision: November 2009 2006 QX56
SENSOR ROTORPFP:47970
Removal and Installation EFS0068E
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 FA X - 5 , "
Removal and Installation" (front), RAX-5, "Removal and Installation"
(rear).