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C1107 ABS Function Enabled Input Circuit Failure

The OBD2 code C1107 indicates a failure in the ABS function enabled input circuit, which means there is a problem with the signal or connection that allows the ABS system to function properly

Definition

The OBD2 code C1107 indicates a failure in the ABS function enabled input circuit, which means there is a problem with the signal or connection that allows the ABS system to function properly

Common causes

  • Faulty ABS control module
  • Damaged wiring or connectors in the ABS circuit
  • Corroded or loose electrical connections
  • Failed wheel speed sensors
  • Malfunctioning brake pedal position sensor
  • Issues with the power supply to the ABS module
  • Software or calibration issues in the ABS system

Common misdiagnoses

  • Faulty ABS module
  • Bad wheel speed sensors
  • Damaged wiring or connectors
  • Faulty brake pedal position sensor
  • Malfunctioning traction control system
  • Incorrectly calibrated ABS system
  • Low brake fluid level
  • Faulty power supply to ABS module

Troubleshooting steps

  1. 1. 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

  2. 2. Inspect Wiring and Connectors

    Visually inspect the wiring and connectors related to the ABS system. Look for signs of damage, corrosion, or loose connections

  3. 3. Pay special attention to the wiring harness leading to the ABS module and any associated sensors

  4. 4. Test the ABS Module

    If the wiring appears to be in good condition, the ABS module itself may be faulty. Use a multimeter to test the module's power and ground connections

  5. 5. Consult the vehicle's service manual for specific testing procedures and pin configurations

  6. 6. Check the ABS Sensors

    Inspect the wheel speed sensors for damage or dirt. Clean or replace them if necessary

  7. 7. Test the sensors' resistance and output using a multimeter. Compare the readings to the specifications in the service manual

  8. 8. Examine the Brake System

    Ensure that the brake fluid level is adequate and that there are no leaks in the brake system

  9. 9. Check the brake components for wear or damage that could affect the ABS operation

  10. 10. Clear Codes and Test Drive

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

  11. 11. Take the vehicle for a test drive to see if the code reappears. Monitor the ABS operation during the drive

  12. 12. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the ABS system for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

  13. 13. Seek Professional Help

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or an automotive technician with experience in ABS systems.Additional Tips: - Always refer to the vehicle's service manual for specific diagnostic procedures and specifications. - Ensure that you have the proper tools and safety equipment when working on the vehicle. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the C1107 code