WOMS
C code chassis Medium severity

C1167 Park Brake Actuator Assembly Switch Released Circuit Short to Gnd

The OBD2 code C1167 indicates a short circuit to ground in the park brake actuator assembly switch released circuit, suggesting a malfunction in the switch or its wiring that affects the park brake system's operation

Definition

The OBD2 code C1167 indicates a short circuit to ground in the park brake actuator assembly switch released circuit, suggesting a malfunction in the switch or its wiring that affects the park brake system's operation

Common causes

  • Damaged wiring or connectors
  • Faulty park brake actuator assembly
  • Short circuit in the park brake switch circuit
  • Corroded or loose connections
  • Malfunctioning brake control module
  • Grounding issues in the circuit

Common misdiagnoses

  • Faulty park brake actuator
  • Damaged wiring or connectors
  • Malfunctioning brake switch
  • Defective body control module (BCM)
  • Incorrectly installed or malfunctioning park brake assembly
  • Grounding issues in the electrical system
  • Faulty instrument cluster
  • Software issues in the vehicle's control modules

Troubleshooting steps

  1. 1. Understand the Code

    C1167 typically indicates that the vehicle's computer has detected a short circuit in the park brake actuator assembly switch circuit. This could be due to wiring issues, a faulty switch, or a problem with the actuator itself

  2. 2. Visual Inspection

    Wiring and Connectors: Inspect the wiring harness and connectors related to the park brake actuator assembly. Look for frayed wires, corrosion, or loose connections

  3. 3. Park Brake Switch

    Check the park brake switch for any visible damage or wear

  4. 4. Check for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are multiple issues

  5. 5. Test the Park Brake Switch

    Continuity Test: Disconnect the park brake switch and perform a continuity test to see if the switch is functioning correctly. It should show continuity when the brake is applied and none when released

  6. 6. Resistance Test

    Measure the resistance across the switch terminals to ensure it is within specifications

  7. 7. Inspect the Park Brake Actuator

    If the switch tests out fine, inspect the park brake actuator assembly itself. Look for any signs of damage or malfunction

  8. 8. Check for Shorts to Ground

    Use a multimeter to check for shorts to ground in the wiring harness. Disconnect the actuator and switch, then test the circuit for continuity to ground. If you find continuity, trace the wiring back to locate the short

  9. 9. Test the Circuit

    With the park brake switch and actuator disconnected, use a multimeter to test the voltage at the connector while applying the park brake. Ensure that the voltage readings are within the manufacturer's specifications

  10. 10. Repair or Replace Components

    Based on your findings, repair any damaged wiring or connectors. If the park brake switch or actuator is faulty, replace it with a new part

  11. 11. Clear the Codes

    After making repairs, clear the trouble codes using an OBD-II scanner and take the vehicle for a test drive to see if the code returns

  12. 12. Seek Professional Help

    If you are unable to resolve the issue after these steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these steps, you should be able to identify and address the cause of the C1167 code effectively