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Infiniti FX35 / FX45. Manual - part 266

BRC-50

< SERVICE INFORMATION >

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS FOR SYMPTOMS

The ABS Function Does Not Operate

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CAUTION:

The ABS does not operate when the speed is 10 km/h (6 MPH) or less.

CHECK ABS WARNING LAMP DISPLAY

Make sure warning lamp turns off approximately 2 seconds after the ignition switch is turned ON or when driv-
ing.
OK or NG

>> CHECK WHEEL SENSOR. Refer to

BRC-49, "Excessive ABS Function Operation Frequency"

>> Perform self-diagnosis. Refer to

BRC-26, "Self-Diagnosis"

Pedal Vibration or ABS Operation Sound Occurs

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CAUTION:

Under the following conditions, when brake pedal is lightly depressed (just place a foot on it), ABS is
activated and vibration is felt. However, this is normal.
• When shifting gears
• When driving on slippery road
• During cornering at high speed
• When passing over bumps or grooves
• When pulling away just after starting engine [at approximately 10 km/h (6 MPH) or higher]

SYMPTOM CHECK 1

Check if pedal vibration or operation sound occurs when engine is started.

OK or NG

>> Perform self-diagnosis. Refer to

BRC-26, "Self-Diagnosis"

>> GO TO 2.

SYMPTOM CHECK 2

Check symptom when electrical component (headlamps, etc.) switches are operated.

Does the symptom occur when the electrical component (head lamp, etc.) switches are operated?

YES

>> Check if there is a radio, antenna, antenna lead wire, or wiring close to ABS actuator and electric

unit (control unit) (or its wiring), and if there is, move it farther away.

>> CHECK WHEEL SENSOR. Refer to

BRC-49, "Excessive ABS Function Operation Frequency"

Vehicle Jerks During VDC/TCS/ABS Control

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CHECK ENGINE SPEED SIGNAL

Perform CONSULT-III “DATA MONITOR” to check engine speed.

Is engine speed at idle 400 rpm or higher?

YES

>> GO TO 3.

>> GO TO 2.

CHECK ABS WARNING LAMP DISPLAY

Make sure warning lamp turns off approximately 2 seconds after the ignition switch is turned ON or when driv-
ing.

OK or NG

>> System is normal.

>> GO TO 3.

CHECK ECM SELF-DIAGNOSTIC RESULTS

Perform ECM self-diagnosis.

Are self-diagnosis items displayed?

YES

>> Check the corresponding items. Refer to

EC-89

(VQ35DE),

EC-666

(VK45DE) in “Engine Control

(EC section)”.

>> GO TO 4.

TROUBLE DIAGNOSIS FOR SYMPTOMS

BRC-51

< SERVICE INFORMATION >

[VDC/TCS/ABS]

BRC

CHECK A/T SELF-DIAGNOSTIC RESULTS

Perform A/T self-diagnosis.
OK or NG

>> GO TO 5.

>> Check the corresponding items. Refer to

AT-41

in “A/T”.

CHECK SELF-DIAGNOSTIC RESULTS 1

Perform self-diagnosis of ABS actuator and electric unit (control unit).

Are self-diagnosis items displayed?

YES

>> Check the corresponding items, make repairs, and perform ABS actuator and electric unit (control

unit) self-diagnosis again.

>> GO TO 6.

CHECK CONNECTOR

Disconnect ABS actuator and electric unit (control unit) connector E56 and ECM connector, check termi-
nals for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace
connector.

Securely reconnect connector and perform self-diagnosis.

OK or NG

>> If poor connect, damaged, open or short circuit is found, repair or replace connector terminal.

>> GO TO 7.

CHECK SELF-DIAGNOSTIC RESULTS 2

Re-perform ABS actuator and electric unit (control unit) self-diagnosis.

Are self-diagnosis items displayed?

YES

>> Repair or replace malfunctioning items.

>> GO TO 8.

CHECK CIRCUIT BETWEEN ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) AND ECM

Check CAN communication circuit. Refer to

BRC-48, "DTC U1000 CAN COMM CIRCUIT"

OK or NG

>> INSPECTION END

>> Connect connectors, and perform ABS actuator and electric unit (control unit) self-diagnosis

again.

BRC-52

< SERVICE INFORMATION >

[VDC/TCS/ABS]

WHEEL SENSORS

WHEEL SENSORS

Removal and Installation

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REMOVAL

Disconnect wheel sensor connector.

Remove wheel sensor mounting bolts, grommets (front sensor) and clip.

Remove wheel sensor.

CAUTION:

Be careful of the following when installing sensor.
• As much as possible, avoid rotating sensor when removing it. Pull sensors out without pulling on

sensor harness.

• Take care to avoid damaging sensor edges or rotor teeth. Remove wheel sensor first before remov-

ing front wheel hub and bearing assembly and rear final drive. This is to avoid damage to sensor wir-
ing and loss of sensor function.

INSTALLATION

Note the following, and install in the reverse order of removal.

CAUTION:

Be careful of the following when installing sensor. Tighten installation bolts to specified torques.
• When installing, make sure there is no foreign material such as iron chips on pick-up and mounting

hole of sensor. Make sure no foreign material has been caught in the sensor rotor. Remove any for-
eign material and clean the mount.

• When installing front sensor, be sure to press rubber grommets in until they lock at the three loca-

tions shown in the figure (2 at shock absorbers and 1 at body panel). When installed, harness must
not be twisted. White line on harness must be visible from front.

• When installing rear sensor, attach harness at rear suspension member securely. Besides, harness

must not be twisted when installed.

PFIA0600E