Preliminary Check

Check brake fluid level in reservoir tank. 

Low fluid level may indicate brake pad wear or leakage from brake line.

Fig 1: Checking Brake Fluid Level In Reservoir Tank

Courtesy of NISSAN MOTOR CO., U.S.A.

Is brake fluid filled between MAX and MIN lines on reservoir tank and/or has brake fluid been contaminated? 

1. Yes : GO TO 2.
2. No : Repair. GO TO 2.

Check brake line for leakage.

Fig 2: Checking Brake Line For Leakage

Courtesy of NISSAN MOTOR CO., U.S.A.

Is leakage present at or around brake lines, tubes or hoses or are any of these parts cracked or damaged? 

1. Yes : GO TO 3.
2. No : Repair. GO TO 3.

Check brake booster for operation and air tightness. Refer to POWER BRAKE UNIT in DISC article.

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Fig 3: Checking Brake Booster Operation And Air Tightness

Courtesy of NISSAN MOTOR CO., U.S.A.

Is brake booster airtight and functioning properly? 

1. Yes : GO TO 4.
2. No : Replace. GO TO 4.

Check brake pad and rotor. Refer to DISC article.

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Fig 4: Checking Brake Pad And Rotor

Courtesy of NISSAN MOTOR CO., U.S.A.

Are brake pads and rotors functioning properly? 

1. Yes : GO TO 5.
2. No : Replace.

Check brake fluid level in reservoir tank again.

Fig 5: Checking Brake Fluid Level In Reservoir Tank

Courtesy of NISSAN MOTOR CO., U.S.A.

Is brake fluid filled between MAX and MIN lines on reservoir tank and/or has brake fluid been contaminated? 

1. Yes : GO TO 6.
2. No : Fill up brake fluid.

Check warning lamp activation.

Fig 6: Checking Warning Lamp Activation

Courtesy of NISSAN MOTOR CO., U.S.A.

Does warning lamp turn on when ignition switch is turned "ON"? 

1. Yes : GO TO 7.
2. No : Check fuse, warning lamp bulb and warning lamp circuit.

Check warning lamp for deactivation after engine is started.

Does warning lamp turn off when engine is started? 

1. Yes : GO TO 8.
2. No: Go to Self-diagnosis. Refer to SELF-DIAGNOSIS PROCEDURE  .

Drive vehicle at speeds over 30 km/h (19 MPH) for at least one minute.

Does warning lamp remain off after vehicle has been driven at 30 km/h (19 MPH) for at least one minute? 

1. Yes : END
2. No : Go to Self-diagnosis. Refer to SELF-DIAGNOSIS PROCEDURE  .