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C code chassis Medium severity

C1174 Park Brake Switch # 2 Applied Circuit Failure

The OBD2 code C1174 indicates a malfunction in the Park Brake Switch # 2 circuit, specifically that the switch is detecting an applied condition when it should not be

Definition

The OBD2 code C1174 indicates a malfunction in the Park Brake Switch # 2 circuit, specifically that the switch is detecting an applied condition when it should not be

Common causes

  • Faulty park brake switch
  • Damaged wiring or connectors
  • Short circuit in the circuit
  • Open circuit in the circuit
  • Corroded terminals
  • Faulty brake control module
  • Poor ground connection

Common misdiagnoses

  • Faulty park brake switch
  • Wiring issues or shorts in the circuit
  • Faulty brake control module
  • Malfunctioning ABS module
  • Incorrectly installed or damaged park brake assembly
  • Issues with the vehicle's body control module (BCM)
  • Low brake fluid level or brake system issues
  • Faulty connectors or terminals in the circuit

Troubleshooting steps

  1. 1. Check the Park Brake Switch:

    Inspect the park brake switch for any visible damage or wear

  2. 2. Ensure that the switch is properly connected and that the wiring harness is intact

  3. 3. Test the switch for continuity using a multimeter. It should show continuity when the parking brake is engaged

  4. 4. Inspect Wiring and Connectors:

    Look for damaged, frayed, or corroded wires in the circuit leading to the park brake switch

  5. 5. Check the connectors for corrosion or loose connections that could cause intermittent signals

  6. 6. Examine the Brake System:

    Ensure that the parking brake is functioning correctly and is not stuck or partially engaged

  7. 7. Check the brake fluid level and the condition of the brake components

  8. 8. Scan for Additional Codes:

    Use an OBD-II scanner to check for any other related trouble codes that may provide more context to the issue

  9. 9. Address any other codes that may be present, as they could be related

  10. 10. Inspect the Instrument Cluster:

    Some vehicles have the park brake indicator integrated into the instrument cluster. Ensure that the cluster is functioning correctly and that there are no issues with the display

  11. 11. Check for Ground Issues:

    Ensure that the ground connections for the park brake switch and related components are secure and free of corrosion

  12. 12. Test the Brake Control Module:

    If applicable, check the brake control module for faults. This may require specialized diagnostic equipment

  13. 13. Clear the Code and Test Drive:

    After performing the above checks and repairs, clear the code using the OBD-II scanner

  14. 14. Take the vehicle for a test drive to see if the code reappears

  15. 15. Seek Professional Help:

    If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician for further diagnosis. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the C1174 code