Nissan Frontier. Manual - part 174

BRC-224

< SYMPTOM DIAGNOSIS >

[TYPE 2]

UNEXPECTED PEDAL REACTION

UNEXPECTED PEDAL REACTION

Diagnosis Procedure

INFOID:0000000009479543

1.

CHECK BRAKE PEDAL STROKE

Check brake pedal stroke. Refer to 

BR-16, "Inspection and Adjustment"

.

Is the stroke too large?

YES

>> • Bleed air from brake tube and hose. Refer to 

BR-18, "Bleeding Brake System"

.

• Check brake pedal, brake booster, and master cylinder for mount play, looseness, brake system

fluid leakage, etc. Refer to 

BR-16, "Inspection and Adjustment"

 (brake pedal), 

BR-11, "On Board

Inspection"

 (master cylinder), 

BR-9, "Inspection"

 (brake booster).

NO

>> GO TO 2

2.

CHECK FUNCTION

Disconnect ABS actuator and electric unit (control unit) connector to deactivate ABS. Check if braking force is

normal in this condition. Connect connector after inspection.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Check brake system.

THE BRAKING DISTANCE IS LONG

BRC-225

< SYMPTOM DIAGNOSIS >

[TYPE 2]

C

D

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A

B

BRC

N

O

P

THE BRAKING DISTANCE IS LONG

Diagnosis Procedure

INFOID:0000000009479544

CAUTION:

The stopping distance on slippery road surfaces might be longer with the ABS operating than when

the ABS is not operating.

1.

CHECK FUNCTION

Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector to deactivate

ABS. In this condition, check stopping distance. After inspection, connect connector.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Check brake system.

BRC-226

< SYMPTOM DIAGNOSIS >

[TYPE 2]

ABS FUNCTION DOES NOT OPERATE

ABS FUNCTION DOES NOT OPERATE

Diagnosis Procedure

INFOID:0000000009479545

CAUTION:

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

1.

CHECK ABS WARNING LAMP DISPLAY

Make sure that the ABS warning lamp turns OFF after ignition switch is turned ON or when driving.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Perform self-diagnosis. Refer to 

BRC-147, "CONSULT Function (ABS)"

. 

PEDAL VIBRATION OR ABS OPERATION SOUND OCCURS

BRC-227

< SYMPTOM DIAGNOSIS >

[TYPE 2]

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A

B

BRC

N

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PEDAL VIBRATION OR ABS OPERATION SOUND OCCURS

Diagnosis Procedure

INFOID:0000000009479546

CAUTION:

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

depressed. However, this is normal.

• When shifting gears

• When driving on slippery road

• During cornering at high speed

• When passing over bumps or grooves [at 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 vibrations 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 the operation noises occur?

YES

>> GO TO 3

NO

>> Perform self -diagnosis. Refer to 

BRC-147, "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.