WOMS
C code chassis Medium severity

C1247 ABS Outlet Valve Coil RR Circuit Open

The OBD2 code C1247 indicates that there is an open circuit in the rear right ABS outlet valve coil, which affects the operation of the anti-lock braking system

Definition

The OBD2 code C1247 indicates that there is an open circuit in the rear right ABS outlet valve coil, which affects the operation of the anti-lock braking system

Common causes

  • Damaged or frayed wiring
  • Faulty ABS outlet valve coil
  • Poor electrical connections
  • Corroded connectors
  • Failed ABS control module
  • Blown fuse related to the ABS system
  • Grounding issues in the ABS circuit

Common misdiagnoses

  • Faulty ABS module
  • Bad wheel speed sensor
  • Damaged wiring or connectors
  • Faulty brake pedal position sensor
  • Incorrectly diagnosed brake fluid level sensor issue
  • Misinterpreted fault in the traction control system
  • Incorrectly identified issues with the master cylinder or brake booster

Troubleshooting steps

  1. 1. Visual Inspection

    Wiring and Connectors: Check the wiring harness and connectors leading to the ABS outlet valve coil for any signs of damage, corrosion, or loose connections

  2. 2. ABS Module

    Inspect the ABS module for any physical damage or signs of water intrusion

  3. 3. Check for Other Codes

    Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues

  4. 4. Test the ABS Outlet Valve Coil

    Resistance Check: Use a multimeter to measure the resistance of the ABS outlet valve coil. Compare the reading to the manufacturer's specifications. If the resistance is out of range, the coil may be faulty

  5. 5. Power and Ground

    Check for proper power and ground at the ABS outlet valve coil connector. Use a multimeter to ensure that the coil is receiving the correct voltage when the ignition is on

  6. 6. Inspect the ABS Module

    If the wiring and coil are in good condition, the issue may lie within the ABS module itself. Check for any internal faults or failures in the module

  7. 7. Check for Short Circuits

    Inspect the wiring for any shorts to ground or other circuits that could cause an open circuit condition. Use a multimeter to check continuity in the wiring

  8. 8. Perform a System Reset

    After addressing any issues found, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns

  9. 9. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the ABS system for your specific vehicle make and model. There may be known issues or recalls that could provide additional guidance

  10. 10. Professional Diagnosis

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician who has experience with ABS systems and can perform more advanced diagnostics.Safety Note Always ensure that you take proper safety precautions when working on a vehicle's braking system. If you are not comfortable performing these steps, it is advisable to seek professional assistance