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Home >> Infiniti >> 2015 >> Q50 Base, RWD >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Brake Control System (VDC - Diagnostic Trouble Codes (DTCS) Symptom Tests And Component R&R) (Exc Hybrid) >> Symptom Diagnosis >> Excessive Operation Frequency >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

  1. CHECK BRAKING FORCE

    Check brake force using a brake tester.

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Check brake system.

  2. CHECK FRONT AND REAR AXLE

    Check that there is no excessive looseness in front and rear axle.

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Repair / replace error-detecting of front or rear axle part.

  3. CHECK WHEEL SENSOR

    Check wheel sensor.

    • Check installation and damage of wheel sensor.
    • Check connection of wheel sensor harness connector.
    • Check terminal of wheel sensor harness connector.

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    Repair installation or replace wheel sensor.

  4. CHECK SENSOR ROTOR

    Check that there is no looseness, damage or foreign material on sensor rotor.

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Repair installation or replace sensor rotor.

  5. CHECK WARNING LAMP TURNS OFF

    Check that ABS warning lamp, brake warning lamp and VDC warning lamp turn OFF approx. 1 second after key switch is turned ON 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).

    Is the inspection result normal?

    YES 

    Normal

    NO 

    GO TO STEP 6  .

  6. PERFORM THE SELF-DIAGNOSIS

    With CONSULT

    1. Turn the ignition switch OFF → ON.
      CAUTION:
      • Be sure to wait of 10 seconds after turning ignition switch OFF or ON.
      • Start the engine.
    2. Repeat step 1 two or more times.
    3. Perform self-diagnosis for "ABS".

    Is any DTC detected?

    YES 

    Check the DTC. Refer to DTC INDEX .

    NO 

    INSPECTION END