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Home › GMC › 2021 › Acadia SL › Repair and Diagnosis › Brakes › Parking Brake System › Diagnostic Information and Procedures › DTC C060B › Circuit/System Testing

Circuit/System Testing

NOTE:

The park brake is disabled as long as the DTC is set. It might be necessary to clear the DTC with a scan tool after repairing the fault to make the park brake work again.

C060B 00, 03, 05

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: M104L Park Brake Actuator - Left & K160 Brake System Control Module
  3. Ignition - On/Vehicle - In Service Mode
  4. Test for less than 1 V between the test points:
    • Terminal 2 @ K160 Brake System Control Module & Ground
    • Terminal 3 @ K160 Brake System Control Module & Ground
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • Go to next step: If less than 1 V 
  5. Ignition/Vehicle - Off
  6. Test for infinite resistance between the test points:
    • Terminal 2 @ K160 Brake System Control Module & Ground
    • Terminal 3 @ K160 Brake System Control Module & Ground
    • If less than infinite resistance - Repair the short to ground on the circuit. 
    • Go to next step: If infinite resistance 
  7. Test for less than 2 ohms between the test points: Terminal 1 @ Harness Connector-M104L Park Brake Actuator - Left & Terminal 3 @ Harness Connector-K160 Brake System Control Module
    • If 2 ohms or greater - Repair the open/high resistance in the circuit. 
    • Go to next step: If less than 2 ohms 
  8. Test for less than 2 ohms between the test points: Terminal 2 @ Harness Connector-M104L Park Brake Actuator - Left & Terminal 2 @ Harness Connector-K160 Brake System Control Module
    • If 2 ohms or greater - Repair the open/high resistance in the circuit. 
    • Go to next step: If less than 2 ohms 
  9. Connect a 25 A fused jumper wire between the test points: Control terminal 1 or Control terminal 2 & 12 V
    10. CAUTION:

    Complete the testing as quickly as possible in order to prevent overheating and damaging the component.

  10. Momentarily connect a jumper wire between the test points: Control terminal 2 or Control terminal 1 & Ground

    Reverse the jumper wires 2 times between the terminals.

    Verify the component works as specified: M104L Park Brake Actuator - Left = Apply & Release

    • If not the specified state 

      Replace the component: M104L Park Brake Actuator - Left

    • Go to next step: If the specified state 
  11. Replace the component: K160 Brake System Control Module

C060B 39

  1. Ignition - On/Vehicle - In Service Mode
  2. Verify DTC C060B 39 is not set.
    • If the DTC is set 
    1. Perform the following learn procedure: Park Brake Calibration .
    2. Ignition - On/Vehicle - In Service Mode
    3. Apply the parking brake.
    4. Release the parking brake.
    5. Verify the DTC does not set.
      • If the DTC sets - Replace the component: M104L Park Brake Actuator - Left
      • Go to next step: If the DTC is not set
    6. All OK.
    • Go to next step: If the DTC is not set 
  3. All OK.

C060B 58

  1. Ignition - On/Vehicle - In Service Mode
  2. Verify DTC C060B 58 is not set.
    • If the DTC is set 

      Replace the component: K160 Brake System Control Module

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