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Home >> GMC >> 2022 >> Hummer EV >> Repair and Diagnosis >> Brakes >> Traction Control >> Antilock Brake System >> Diagnostic Information and Procedures >> DTC C06AF >> Circuit/System Verification

Circuit/System Verification

  1. Verify there are no DTCs set related to the following component/system: Antilock Braking System
    • Go to next step: If none of the DTCs are set 
  2. Inspect the following components:
    • B5 Wheel Speed Sensor Correct part
    • B5 Wheel Speed Sensor = Visible Damage
    • If a condition exists 

      Replace the component: B5 Wheel Speed Sensor

    • Go to next step: If no conditions exist 
  3. Test drive the vehicle.

    All sensors must show the same speed when driving in a straight line at a speed greater than 40 km/h (25 MPH).

  4. Verify the following parameters are within 1.6 km/h (1 MPH) of each other: Wheel Speed Sensor
    • If within 1.6 km/h (1 MPH) of each other 

      Replace the component for which the DTC was set.

    • Go to next step: If not within 1.6 km/h (1 MPH) of each other 
  5. Inspect the wheel speed sensor reluctor ring for foreign debris. Refer to: Wheel Speed Sensor Reluctor Ring Cleaning and Inspection 
  6. Replace the appropriate component: B5 Wheel Speed Sensor
  7. Verify the DTC does not set.
    • If the DTC is set 

      Replace the module that set the DTC.

    • Go to next step: If the DTC is not set 
  8. All OK.