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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 160 (Park Brake) >> Diagnostic Information and Procedures >> DTC C060B >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
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, 13, 16

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: M104L Parking 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 12 @ K160 Brake System Control Module Harness Connector & Ground
    • Terminal 13 @ K160 Brake System Control Module Harness Connector & 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 12 @ K160 Brake System Control Module Harness Connector & Ground
    • Terminal 13 @ K160 Brake System Control Module Harness Connector & 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 Parking Brake Actuator - Left & Terminal 13 @ 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 Parking Brake Actuator - Left & Terminal 12 @ 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 & 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 & Ground

    Reverse the jumper wires 2 times between the terminals.

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

    • If not the specified state 

      Replace the component: M104L Parking Brake Actuator - Left

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

C060B 49, 92

  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC 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 Parking 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 98

  1. Allow the parking brake actuators to cool
  2. Ignition - On / Vehicle - In Service Mode
  3. Verify DTC is not set:
    • If the DTC is set 

      Replace the component: M104L Parking Brake Actuator - Left

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