WOMS
C code chassis High severity

C1903 Ride Control RR Shock Actuator Circuit Short To Battery

The OBD2 code C1903 indicates a short circuit in the rear right shock actuator circuit, meaning there is an electrical fault causing the circuit to connect directly to the battery, which can affect the ride control...

Definition

The OBD2 code C1903 indicates a short circuit in the rear right shock actuator circuit, meaning there is an electrical fault causing the circuit to connect directly to the battery, which can affect the ride control system's performance

Common causes

  • Damaged wiring or connectors
  • Short circuit in the actuator circuit
  • Faulty ride control shock actuator
  • Corroded terminals
  • Poor ground connection
  • Malfunctioning control module
  • Water intrusion in electrical components

Common misdiagnoses

  • Faulty shock absorber
  • Bad wiring or connectors
  • Defective ride control module
  • Incorrectly calibrated suspension system
  • Battery or charging system issues
  • Grounding problems
  • Faulty sensors related to ride control

Troubleshooting steps

  1. 1. Visual Inspection

    Wiring and Connectors: Check the wiring harness and connectors associated with the rear right shock actuator. Look for signs of damage, fraying, corrosion, or loose connections

  2. 2. Ground Connections

    Ensure that all ground connections are secure and free of corrosion

  3. 3. Check for Short Circuits

    Multimeter Testing: Use a multimeter to check for continuity in the wiring. Look for any shorts to battery voltage or ground. Disconnect the actuator and measure resistance between the actuator terminals and the vehicle ground

  4. 4. Inspect for Pinched Wires

    Look for any areas where the wiring may be pinched or chafed against metal surfaces

  5. 5. Test the Shock Actuator

    Actuator Functionality: If possible, test the shock actuator itself. You can do this by applying power directly to the actuator to see if it operates correctly

  6. 6. Resistance Check

    Measure the resistance of the actuator. Compare it to the manufacturer’s specifications to determine if it is within the acceptable range

  7. 7. Check the Control Module

    Module Functionality: Inspect the ride control module for any signs of damage or failure. If the module is faulty, it may send incorrect signals to the actuator

  8. 8. Software Updates

    Check if there are any software updates available for the control module that may address known issues

  9. 9. Scan for Additional Codes

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

  10. 10. Clear Codes and Test Drive

    Clear the Code: After performing the above checks and repairs, clear the trouble code using an OBD-II scanner

  11. 11. Test Drive

    Take the vehicle for a test drive to see if the code reappears. Monitor the ride control system to ensure it is functioning properly

  12. 12. Professional Diagnosis

    Seek Professional Help: If you are unable to resolve the issue, consider taking the vehicle to a qualified technician or dealership for further diagnosis. By following these steps, you should be able to identify the cause of the C1903 code and take appropriate action to resolve the issue