WOMS
C code chassis High severity

C1205 ABS Outlet Valve Coil Rear Circuit Short To Ground

The OBD2 code C1205 indicates a short circuit to ground in the rear outlet valve coil of the ABS system, which can affect the operation of the anti-lock braking system

Definition

The OBD2 code C1205 indicates a short circuit to ground in the rear outlet valve coil of the ABS system, which can affect the operation of the anti-lock braking system

Common causes

  • Damaged wiring or connectors
  • Shorted ABS outlet valve coil
  • Faulty ABS control module
  • Corroded terminals
  • Poor ground connection
  • Water intrusion in electrical components
  • Manufacturing defects in the ABS system

Common misdiagnoses

  • Faulty ABS module
  • Damaged wiring or connectors
  • Faulty wheel speed sensors
  • Incorrectly installed or defective brake components
  • Faulty brake pedal position sensor
  • Malfunctioning hydraulic control unit (HCU)
  • Issues with the power supply to the ABS system

Troubleshooting steps

  1. 1. Verify the Code

    Use an OBD-II scanner to confirm the presence of the C1205 code

  2. 2. Check for any additional codes that may provide more context

  3. 3. Inspect the ABS System

    Visual Inspection: Check the ABS module, wiring harness, and connectors for any visible damage, corrosion, or loose connections

  4. 4. Wiring

    Look for frayed wires, broken insulation, or any signs of wear that could cause a short to ground

  5. 5. Check the ABS Module

    Ensure that the ABS module is securely mounted and that all connectors are properly seated

  6. 6. Inspect the module for any signs of damage or moisture intrusion

  7. 7. Test the Outlet Valve Coil

    Use a multimeter to measure the resistance of the outlet valve coil. Compare the reading to the manufacturer's specifications

  8. 8. If the resistance is too low (indicating a short), the coil may need to be replaced

  9. 9. Check for Shorts to Ground

    With the multimeter, check for continuity between the outlet valve coil circuit and ground. A reading of zero ohms indicates a short

  10. 10. Trace the wiring back to the ABS module to identify where the short may be occurring

  11. 11. Inspect Ground Connections

    Ensure that all ground connections related to the ABS system are clean, tight, and free of corrosion

  12. 12. Check the ground points for the ABS module and outlet valve coil

  13. 13. Test the ABS Relay (if applicable)

    If the vehicle has an ABS relay, test it to ensure it is functioning properly

  14. 14. Replace the relay if it is found to be faulty

  15. 15. Clear the Codes and Test Drive

    After performing repairs, clear the codes using the OBD-II scanner

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

  17. 17. Seek Professional Help

    If the issue persists after following these steps, consider seeking assistance from a professional mechanic or an automotive technician with experience in ABS systems.Additional Tips: - Always disconnect the battery before working on electrical components to prevent shorts or damage. - Document any changes or repairs made during the troubleshooting process for future reference. By following these steps, you should be able to identify and resolve the issue related to the C1205 code