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Home >> Infiniti >> 2022 >> QX55 Essential >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control System >> Symptom Diagnosis >> Does Not Operate >> Diagnosis Procedure

Diagnosis Procedure

VDC function, TCS function, ABS function, EBD function, Brake assist function, hill start assist function or Brake force distribution function does not operate.

CAUTION:
  • VDC function, TCS function, ABS function, EBD function, Brake assist function, hill start assist function and Brake force distribution function never operate when the vehicle speed is 10 km/h (6.2 MPH) or less. However, TCS function and hill start assist function operates when the vehicle speed is 0 km/h (0 MPH) (the vehicle is in stop status).
  • VDC function and TCS function never operate when VDC OFF switch is operated (when VDC OFF indicator lamp turns ON).
  1. CHECK ABS WARNING LAMP 

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

    Is the inspection result normal?

    YES

    Normal

    NO

    GO TO 2.

  2. PERFORM SELF DIAGNOSTIC RESULT 

    SYMBOL CONSULT

    1. Ignition switch OFF -> ON.
      CAUTION:
      • Be sure to wait of 10 seconds after pressing ignition switch OFF or ON.
      • Start the engine.
    2. Repeat step 1 two or more times.
    3. Select "Self Diagnostic Result" mode of "ABS".

    Is any DTC detected?

    YES

    Check the DTC. Refer to DTC Index .

    NO

    Inspection End.