Nissan Sentra. Manual - part 179

PEDAL VIBRATION OR ABS OPERATION SOUND OCCURS

BRC-103

< SYMPTOM DIAGNOSIS >

[VDC/TCS/ABS]

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PEDAL VIBRATION OR ABS OPERATION SOUND OCCURS

Diagnosis Procedure

INFOID:0000000009757896

CAUTION:

Under the following conditions, ABS is activated and vibration is felt when brake pedal is lightly

depressed (just place a foot on it). However, this is normal.

• When shifting gears

• When driving on slippery road

• During cornering at high speed

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

• When pulling away just after starting engine [at approximately 10 km/h (6 MPH) or higher]

1.

SYMPTOM CHECK 1

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

YES

>> GO TO 2

NO

>> Inspect the brake pedal.

2.

SYMPTOM CHECK 2

Check that there are ABS operation noises when the engine is started.
Do symptoms occur?

YES

>> GO TO 3

NO

>> Perform self diagnostic result. Refer to 

BRC-31, "CONSULT Function (ABS)"

.

3.

SYMPTOM CHECK 3

Check symptoms when electrical component (headlamps, etc.) switches are operated.
Do symptoms occur?

YES

>> Check if there is a radio, antenna, antenna lead wire, or wiring close to the control unit. If there is,

move it farther away.

NO

>> Inspection End.

BRC-104

< SYMPTOM DIAGNOSIS >

[VDC/TCS/ABS]

VEHICLE JERKS DURING VDC/TCS/ABS CONTROL

VEHICLE JERKS DURING VDC/TCS/ABS CONTROL

Diagnosis Procedure

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1.

SYMPTOM CHECK

Check if the vehicle jerks during VDC/TCS/ABS control.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> GO TO 2

2.

CHECK SELF DIAGNOSTIC RESULT

Perform self diagnostic result of ABS actuator and electric unit (control unit). Refer to 

BRC-31, "CONSULT

Function (ABS)"

.

Are self diagnostic results indicated?

YES

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

unit) self diagnostic result again. Refer to 

BRC-31, "CONSULT Function (ABS)"

.

NO

>> GO TO 3

3.

CHECK CONNECTOR

1. Turn ignition switch OFF.

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

3. Check terminals for deformation, disconnection, looseness, etc.

4. Securely reconnect connector and perform ABS actuator and electric unit (control unit) self diagnostic

result. Refer to 

BRC-31, "CONSULT Function (ABS)"

.

Are self diagnostic results indicated?

YES

>> If poor contact, damage, open or short circuit of connector terminal is found, repair or replace.

NO

>> GO TO 4

4.

CHECK ECM AND TCM SELF DIAGNOSTIC RESULT

1. Perform ECM self diagnostic result. Refer to 

EC-66, "CONSULT Function"

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2. Perform TCM self diagnostic result. Refer to 

TM-108, "CONSULT Function"

.

Are self diagnostic results indicated?

YES

>> Check the corresponding items.

• ECM: Refer to 

EC-94, "DTC Index"

.

• TCM: Refer to 

TM-126, "DTC Index"

.

NO

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

BRC-110, "Removal and Installa-

tion"

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NORMAL OPERATING CONDITION

BRC-105

< SYMPTOM DIAGNOSIS >

[VDC/TCS/ABS]

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NORMAL OPERATING CONDITION

Description

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Symptom

Result

Slight vibrations are felt on the brake pedal and operation noises occur when VDC, TCS or ABS is activated. 

This is a normal condi-
tion due to the VDC, 
TCS or ABS activation.

Stopping distance is longer than that of vehicles without ABS when the vehicle drives on rough, gravel, or 
snow-covered (fresh, deep snow) roads.

The brake pedal moves and generates noises when TCS or VDC is activated due to rapid acceleration or 
sharp turn.

The brake pedal vibrates and motor operation noises occur from the engine room after the engine starts and 
just after the vehicle starts.

This is normal, and it is 
caused by the ABS op-
eration check.

Depending on the road conditions, the driver may experience a sluggish feel in the brake pedal. 

This is normal, because 
TCS places the highest 
priority on the optimum 
traction (stability).

TCS may activate momentarily if wheel speed changes when driving where road friction coefficient varies, 
when downshifting, or when fully depressing accelerator pedal.

The ABS warning lamp and SLIP indicator lamp may turn ON when the vehicle is subject to strong shaking 
or large vibration, such as when the vehicle is rotating on a turntable or located on a ship while the engine 
is running. 

In this case, restart the 
engine on a normal 
road. If the normal con-
dition is restored, there 
is no malfunction. At 
that time, erase the self-
diagnosis memory.

VDC may not operate normally or the ABS warning lamp, and SLIP indicator lamp may illuminate when driv-
ing on a road that is extremely slanted (e.g., bank in a circuit course). 

A malfunction may occur in the yaw rate/side/decel G sensor system when the vehicle turns sharply, such 
as during a spin turn, axle turn, or drift driving, while the VDC function is OFF (VDC OFF indicator lamp illu-
minated). 

The vehicle speed will not increase even though the accelerator pedal is depressed, when inspecting the 
speedometer on a 2-wheel chassis dynamometer. 

Normal (Deactivate the 
VDC/TCS function be-
fore performing an in-
spection on a chassis 
dynamometer.)

SLIP indicator lamp may simultaneously turn ON when low tire pressure warning lamp turns ON.

This is not a VDC sys-
tem error but results 
from characteristic 
change of tire.

BRC-106

< REMOVAL AND INSTALLATION >

[VDC/TCS/ABS]

WHEEL SENSOR

REMOVAL AND INSTALLATION

WHEEL SENSOR

FRONT WHEEL SENSOR
FRONT WHEEL SENSOR : Exploded View

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FRONT WHEEL SENSOR : Removal and Installation

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CAUTION:

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

• When removing the front or rear wheel hub, first remove the wheel sensor from the wheel hub. Fail-

ure to do so may result in damage to the wheel sensor wires, making the sensor inoperative.

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

sor harness.

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

the sensor or to the inside of the hole in the wheel hub for the wheel sensor, or if a foreign object is

caught in the surface of the mating surface for the sensor rotor. Clean as necessary and then install

the wheel sensor.

REMOVAL

1. Remove the front wheels and tires using power tool. Refer to 

WT-47, "Adjustment"

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2. Remove the fender protector (front). Refer to 

EXT-28, "FENDER PROTECTOR : Removal and Installation

- Front Fender Protector"

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3. Disconnect front wheel sensor harness connector.
4. Disconnect front wheel sensor harness from brackets.
5. Remove front wheel sensor bolt.
6. Remove front wheel sensor.

INSTALLATION

1.

Front wheel sensor

2.

Front wheel sensor harness connector

Front

JPFIC0191GB