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Home >> Infiniti >> 2002 >> QX4 RWD >> Repair and Diagnosis >> Brakes >> Anti-Lock/Traction Control >> Preparation >> Trouble Diagnosis - Basic Introduction >> Preliminary Check

Preliminary Check

  1. CHECK BRAKE FLUID 

    Check brake fluid for contamination.

    Has brake fluid been contaminated? 

    1. Yes : Replace. GO TO 2.
    2. No : GO TO 2.
  2. CHECK BRAKE FLUID LEVEL 

    Check brake fluid level in reservoir tank.

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

    Fig 1: Identifying Brake Fluid OK Level In Reservoir Tank
    G02004478Courtesy of NISSAN MOTOR CO., U.S.A.

    Is brake fluid filled between MAX and MIN lines on reservoir tank? 

    1. Yes : GO TO 3.
    2. No : Fill up brake fluid. GO TO 3.
  3. CHECK BRAKE LINE 

    Check brake line for leakage.

    Fig 2: Identifying Brake Line Leakage
    G02004479Courtesy 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 : Repair. GO TO 4.
    2. No : GO TO 4.
  4. CHECK BRAKE BOOSTER OPERATION 

    Check brake booster for operation and air tightness. Refer to "On-vehicle Service", "BRAKE BOOSTER " .

    Fig 3: Checking Brake Booster Operation
    G02004480Courtesy of NISSAN MOTOR CO., U.S.A.

    Is brake booster airtight and functioning properly? 

    1. Yes : GO TO 5.
    2. No : Replace. GO TO 5.
  5. CHECK BRAKE PAD AND ROTOR 

    Check brake pad and rotor. Refer to (FRONT DISC BRAKE , ROTOR ).

    Fig 4: Checking Brake Pad And Rotor
    G02004481Courtesy of NISSAN MOTOR CO., U.S.A.

    Are brake pads and rotors functioning properly? 

    1. Yes : GO TO 6.
    2. No : Replace.
  6. RECHECK BRAKE FLUID LEVEL 

    Check brake fluid level in reservoir tank again.

    Fig 5: Identifying Brake Fluid OK Level In Reservoir Tank
    G02004482Courtesy of NISSAN MOTOR CO., U.S.A.

    Is brake fluid filled between MAX and MIN lines on reservoir tank? 

    1. Yes : GO TO 7.
    2. No : Fill up brake fluid.
  7. CHECK WARNING LAMP ACTIVATION 

    Check warning lamp activation.

    Fig 6: Identifying ABS Warning Lamp
    G02004483Courtesy of NISSAN MOTOR CO., U.S.A.

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

    1. Yes : GO TO 8.
    2. No : Check fuse, warning lamp bulb and warning lamp circuit.
  8. CHECK WARNING LAMP DEACTIVATION 

    Check warning lamp for deactivation after engine is started.

    Does warning lamp turn off when engine is started? 

    1. Yes : GO TO 9.
    2. No : Go to Self-diagnosis (SELF-DIAGNOSIS , SELF-DIAGNOSTIC RESULTS MODE ).
  9. DRIVE VEHICLE 

    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 : INSPECTION END 
    2. No : Go to Self-diagnosis (FUNCTION , SELF-DIAGNOSTIC RESULTS MODE ).