WOMS
C code chassis Medium severity

C1906 Ride Control LR Shock Actuator Circuit Open

The OBD2 code C1906 indicates that there is an open circuit in the left rear shock actuator of the ride control system, meaning the actuator is not receiving power or is not functioning properly

Definition

The OBD2 code C1906 indicates that there is an open circuit in the left rear shock actuator of the ride control system, meaning the actuator is not receiving power or is not functioning properly

Common causes

  • Faulty shock actuator
  • Open or damaged wiring
  • Poor electrical connections
  • Failed ride control module
  • Corroded connectors
  • Blown fuse
  • Grounding issues

Common misdiagnoses

  • Faulty shock absorber
  • Bad wiring or connectors
  • Defective ride control module
  • Incorrectly calibrated suspension system
  • Faulty body control module
  • Low battery voltage
  • Issues with other suspension components
  • Software or programming errors in the vehicle's control systems

Troubleshooting steps

  1. 1. Check the Vehicle's Manual

    Refer to the vehicle's service manual for specific information related to the ride control system and the C1906 code. This can provide valuable insights into the circuit layout and components involved

  2. 2. Visual Inspection

  3. 3. Inspect the wiring and connectors associated with the left rear shock actuator. Look for any signs of damage, corrosion, or loose connections

  4. 4. Check the actuator itself for physical damage or signs of wear

  5. 5. Test the Shock Actuator

  6. 6. Use a multimeter to check the resistance of the shock actuator. Compare the readings to the specifications in the service manual

  7. 7. If the actuator is not within the specified range, it may need to be replaced

  8. 8. Check for Open Circuits

  9. 9. Use a multimeter to test for continuity in the wiring harness leading to the left rear shock actuator. Look for any breaks or opens in the circuit

  10. 10. If an open circuit is found, repair or replace the damaged wiring

  11. 11. Inspect the Control Module

  12. 12. Check the ride control module for any fault codes or issues. If the module is malfunctioning, it may not be sending the correct signals to the actuator

  13. 13. Ensure that the module is properly grounded and that all connections are secure

  14. 14. Scan for Additional Codes

  15. 15. Use an OBD-II scanner to check for any additional trouble codes that may provide more context to the issue. Other codes may indicate related problems that need to be addressed

  16. 16. Clear Codes and Test Drive

  17. 17. After performing repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns

  18. 18. Consult a Professional

  19. 19. If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician who has experience with the specific vehicle's ride control system. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the C1906 code. Always ensure safety precautions are taken when working on vehicle electrical systems