Nissan Quest E52. Manual - part 255

UNEXPECTED BRAKE PEDAL REACTION

BRC-113

< SYMPTOM DIAGNOSIS >

[WITH VDC]

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UNEXPECTED BRAKE PEDAL REACTION

Description

INFOID:0000000009651441

A malfunction of brake pedal feel (height or others) is detected when brake pedal is depressed.

Diagnosis Procedure

INFOID:0000000009651442

1.

CHECK FRONT AND REAR AXLE

Check that there is no excessive looseness in front and rear axle.
• Front axle: Refer to 

FAX-7, "Inspection"

.

• Rear axle: Refer to 

RAX-4, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK DISC ROTOR

Check disc rotor runout.
• Front: Refer to 

BR-14, "DISC ROTOR : Inspection and Adjustment"

.

• Rear: Refer to 

BR-16, "DISC ROTOR : Inspection and Adjustment"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>>

Refinish disc rotor.

• Front: Refer to 

BR-14, "DISC ROTOR : Inspection and Adjustment"

.

• Rear: Refer to 

BR-16, "DISC ROTOR : Inspection and Adjustment"

.

3.

CHECK BRAKE FLUID LEAKAGE

Check fluid leakage.
• Front: Refer to 

BR-22, "FRONT : Inspection"

.

• Rear: Refer to 

BR-25, "REAR : Inspection"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

4.

CHECK BRAKE PEDAL

Check each item of brake pedal. Refer to 

BR-7, "Inspection and Adjustment"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Adjust each item of brake pedal. Refer to 

BR-7, "Inspection and Adjustment"

.

5.

CHECK BRAKING FORCE

Check brake force using a brake tester.
Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Check each components of brake system.

6.

CHECK BRAKE PERFORMANCE

Disconnect ABS actuator and electric unit (control unit) connector so that ABS does not operate. Check that
brake force is normal in this condition. Connect harness connectors after checking.
Is the inspection result normal?

YES

>> Normal

NO

>> Check each components of brake system.

BRC-114

< SYMPTOM DIAGNOSIS >

[WITH VDC]

THE BRAKING DISTANCE IS LONG

THE BRAKING DISTANCE IS LONG

Description

INFOID:0000000009651443

Brake stopping distance is long when ABS function is operated.

Diagnosis Procedure

INFOID:0000000009651444

CAUTION:

Brake stopping distance on slippery road like rough road, gravel road or snowy road may become
longer when ABS is operated than when ABS is not operated.

1.

CHECK BRAKING FORCE

Check brake force using a brake tester.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Check each components of brake system.

2.

CHECK BRAKE PERFORMANCE

Disconnect ABS actuator and electric unit (control unit) connector so that ABS does not operate. Check brake
stopping distance in this condition. Connect harness connectors after checking.

Is the inspection result normal?

YES

>> Normal

NO

>> Check each components of brake system.

DOES NOT OPERATE

BRC-115

< SYMPTOM DIAGNOSIS >

[WITH VDC]

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DOES NOT OPERATE

Description

INFOID:0000000009651445

VDC function, TCS function, ABS function, EBD function and brake limited slip differential (BLSD) function
does not operate.

Diagnosis Procedure

INFOID:0000000009651446

CAUTION:

• VDC function, ABS function and EBD function never operate when the vehicle speed is 10 km/h (6.2

MPH) or less.

• VDC function and TCS function never operate when VDC OFF switch is operated (when VDC OFF

indicator lamp turns ON).

1.

CHECK WARNING LAMP

Check that ABS warning lamp, brake warning lamp and VDC warning lamp turn ON and turn OFF approx. 2
second after key switch is turned ON. Check that ABS warning lamp, brake warning lamp and VDC warning
lamp and stay in OFF status during driving.

CAUTION:

• Brake warning lamp turns ON when parking brake is operated (parking brake switch is ON) or brake

fluid is less than the specified level (brake fluid level switch is ON).

• VDC function and TCS function never operate when VDC OFF switch is operated (when VDC OFF

indicator lamp turns ON).

Is the inspection result normal?

YES

>> Normal

NO

>> Perform self-diagnosis for “ABS” with CONSULT.

BRC-116

< SYMPTOM DIAGNOSIS >

[WITH VDC]

BRAKE PEDAL VIBRATION OR OPERATION SOUND OCCURS

BRAKE PEDAL VIBRATION OR OPERATION SOUND OCCURS

Description

INFOID:0000000009651447

• 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. 15 km/h (9.3 MPH) or higher]

Diagnosis Procedure

INFOID:0000000009651448

1.

SYMPTOM CHECK 1

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

YES

>> GO TO 2.

NO

>> Check brake pedal. Refer to 

BR-19, "Inspection and Adjustment"

.

2.

SYMPTOM CHECK 2

Check that motor noise from ABS actuator and electric unit (control unit) occurs when the engine starts.

Does the operation sound occur?

YES

>> GO TO 3.

NO

>> Perform self-diagnosis for “ABS” with CONSULT.

3.

SYMPTOM CHECK 3

Check symptoms when electrical component (headlamps, 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).

NO

>> Normal