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Nissan Pathfinder. Manual - part 264

BRAKE PEDAL VIBRATION OR OPERATION SOUND OCCURS

BRC-115

< SYMPTOM DIAGNOSIS >

[VDC/TCS/ABS]

BRC

BRAKE PEDAL VIBRATION OR OPERATION SOUND OCCURS

Description

INFOID:0000000009177343

• Brake pedal vibrates and motor sound from ABS actuator and electric unit (control unit) occurs when the

engine starts.

• Brake pedal vibrates during braking.

CAUTION:

Vibration may be felt during brake pedal is lightly depressed (just placing a foot on it) in the following

conditions. This is normal.

• When shifting gears

• When driving on slippery road

• During cornering at high speed

• When passing over bumps or grooves [Approx. 50 mm (1.97 in) or more]

• When pulling away just after starting engine [at approx. 10 km/h (6.2 MPH) or higher]

Diagnosis Procedure

INFOID:0000000009177344

SYMPTOM CHECK 1

Check that there are pedal vibrations when the engine is started.
Do vibrations occur?

YES

>> GO TO 2.

>> Check brake pedal. Refer to

BR-7, "Inspection"

SYMPTOM CHECK 2

Check that motor sound from ABS actuator occurs when the engine starts.
Does the operation sound occur?

YES

>> GO TO 3.

>> Perform self-diagnosis result. Refer to

BRC-32, "CONSULT Function"

SYMPTOM CHECK 3

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

YES

>> Check that radio (including wiring), antenna and antenna lead-in wires are not located near ABS

actuator and electric unit (control unit). Move them if they are located near ABS actuator and elec-

tric unit (control unit).

>> Inspection End.

BRC-116

< SYMPTOM DIAGNOSIS >

[VDC/TCS/ABS]

VEHICLE JERKS DURING VDC/TCS/ABS CONTROL

VEHICLE JERKS DURING VDC/TCS/ABS CONTROL

Description

INFOID:0000000009177345

The vehicle jerks when VDC function, TCS function, ABS function, EBD function or hill start assist function

operates.

Diagnosis Procedure

INFOID:0000000009177346

CHECK SYMPTOM

Check that the vehicle jerks when VDC function, TCS function, ABS function, EBD function or hill start assist

function operates.
Is the inspection result normal?

YES

>> Inspection End.

>> GO TO 2.

PERFORM THE SELF-DIAGNOSIS

With CONSULT

Perform self-diagnosis result. Refer to

BRC-32, "CONSULT Function"

Is any DTC detected?

YES

>> Check the DTC. Refer to

BRC-42, "DTC Index"

>> GO TO 3.

CHECK CONNECTOR

With CONSULT

1. Turn the ignition switch OFF.

2. Disconnect ABS actuator and electric unit (control unit) harness connector.

3. Check connector terminal for deformation, disconnection and looseness.

4. Connect harness connector and perform self-diagnosis result. Refer to

BRC-32, "CONSULT Function"

Is the inspection result normal?

YES

>> GO TO 4.

>> Repair or replace connector terminal.

CHECK ECM AND TCM SELF-DIAGNOSIS RESULTS

With CONSULT

Perform self-diagnosis result for “ENGINE” and “TRANSMISSION”.
Is any DTC detected?

YES

>> Check the DTC.

>> Replace ABS actuator and electric unit (control unit). Refer to

BRC-123, "Removal and Installa-

tion"

NORMAL OPERATING CONDITION

BRC-117

< SYMPTOM DIAGNOSIS >

[VDC/TCS/ABS]

BRC

NORMAL OPERATING CONDITION

Description

INFOID:0000000009177347

Symptom

Result

Brake pedal slightly vibrates and operation sound (motor sound and sound from suspen-
sion) occurs when VDC function, TCS function, ABS function, EBD function or hill start as-
sist function operates.

This is not a malfunction, because it is
caused by VDC function, TCS function,
ABS function, EBD function and hill start
assist function that are normally operat-
ed.

Brake stopping distance may become longer than models without ABS function depending
on the road conditions, when ABS function is operated on slippery road like rough road,
gravel road or snowy road.

Brake pedal vibrates and operation sound occurs during sudden acceleration and corner-
ing, when VDC function or TCS function is operated.

Brake pedal vibrates and motor sound from the engine room occurs when the engine starts
or the vehicle starts just after starting the engine.

This is not a malfunction because it is
caused by operation check of ABS actua-
tor and electric unit (control unit).

Acceleration may be felt insufficient depending on the road conditions.

This is not a malfunction because it is
caused by TCS function that puts the
highest priority to obtain the optimum
traction (stability).

TCS function may operate momentarily while driving on a road where friction coefficient
varies or when downshifting or fully depressing accelerator pedal.

ABS warning lamp and VDC warning lamp may turn ON when the vehicle is on a rotating
turntable or is given a strong shaking or large vibrations on a ship while the engine is run-
ning.

In this case, restart the engine on a nor-
mal road. If the normal condition is re-
stored, there is no malfunction. In that
case, erase “ABS” self-diagnosis result
memory with CONSULT.

VDC warning lamp may turn ON and VDC function and TCS function may not normally op-
erate, when driving on a special road the is extremely slanted (bank in a circuit course).

A malfunction in yaw rate/side/decel G sensor system may be detected when the vehicle
sharply turns during a spin turn, acceleration turn or drift driving while VDC function and
TCS function are OFF (VDC OFF switch is pressed and VDC OFF indicator lamp is in ON
status).

The vehicle speed does not increase when the accelerator pedal is depressed while the
vehicle is on a 2-wheel chassis dynamometer for speedometer check.

This is normal. (When checking the vehi-
cle on a chassis dynamometer, operate
VDC OFF switch so that TCS function is
OFF.)

BRC-118

< UNIT REMOVAL AND INSTALLATION >

[VDC/TCS/ABS]

WHEEL SENSOR

UNIT REMOVAL AND INSTALLATION

WHEEL SENSOR

Exploded View - Front Wheel Sensor

INFOID:0000000009177348

Removal and Installation - Front Wheel Sensor

INFOID:0000000009177349

CAUTION:

• Be careful not to damage front wheel sensor edge and sensor rotor teeth.

• When removing the front wheel hub and bearing, first remove the front wheel sensor from the steer-

ing knuckle. Failure to do so may result in damage to the front wheel sensor wires making the front

wheel sensor inoperative.

• Pull out the front wheel sensor, being careful to turn it as little as possible. Do not pull on the front

wheel sensor harness.

• Before installation, check if foreign objects such as iron fragments are adhered to the pick-up part of

the front wheel sensor or to the inside of the hole in the steering knuckle for the front wheel sensor,

or if a foreign object is caught in the surface of the mating surface for the sensor rotor. Fix as neces-

sary and then install the front wheel sensor.

REMOVAL

1. Remove the front wheel and tire using power tool. Refer to

WT-58, "Adjustment"

2. Partially remove the fender protector to gain access to the wheel sensor harness connector.
3. Disconnect the harness connector from the front wheel sensor.
4. Remove the front wheel sensor bolt.
5. Remove the front wheel sensor from the strut bracket and body brackets.
6. Remove the front wheel sensor from the steering knuckle.

INSTALLATION

Front wheel sensor

A. Color line (slant line)

B. Front wheel sensor connector

Front

AWFIA0886GB

Content .. 262 263 264 265 ..