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C code chassis High severity

C1795 Air Suspension RR Air Spring/Shock Solenoid Output Circuit Failure

The OBD2 code C1795 indicates a failure in the output circuit for the rear air spring or shock solenoid in the air suspension system, suggesting a malfunction in the electrical circuit or the solenoid itself

Definition

The OBD2 code C1795 indicates a failure in the output circuit for the rear air spring or shock solenoid in the air suspension system, suggesting a malfunction in the electrical circuit or the solenoid itself

Common causes

  • Faulty air spring/shock absorber
  • Damaged wiring or connectors
  • Failed solenoid
  • Air suspension control module malfunction
  • Air leak in the system
  • Corroded or loose electrical connections
  • Faulty relay
  • Low air pressure in the system

Common misdiagnoses

  • Faulty air spring or shock absorber
  • Air suspension compressor failure
  • Wiring or connector issues
  • Faulty air suspension control module
  • Low air pressure in the system
  • Air leaks in the suspension system
  • Incorrectly calibrated height sensors
  • Battery or electrical system issues

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 the Wiring and Connectors

    Visual Inspection: Look for any visible damage to the wiring harness, connectors, or terminals related to the rear air suspension system

  3. 3. Corrosion

    Check for corrosion or loose connections at the solenoid and any related connectors

  4. 4. Continuity Test

    Use a multimeter to test for continuity in the wiring between the control module and the solenoid. Look for breaks or shorts in the circuit

  5. 5. Test the Solenoid

    Functionality: If accessible, test the solenoid itself to ensure it is functioning properly. You can apply direct power to the solenoid to see if it activates

  6. 6. Resistance Check

    Measure the resistance of the solenoid with a multimeter. Compare the reading to the manufacturer’s specifications

  7. 7. Check the Air Suspension Control Module

    Connections: Ensure that the control module is properly connected and that there are no issues with the module itself

  8. 8. Software Updates

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

  9. 9. Inspect the Air Suspension System

    Air Leaks: Check for any air leaks in the air spring or associated components that could affect the system's performance

  10. 10. Air Pressure

    Ensure that the air suspension system is maintaining the correct air pressure

  11. 11. Test the Vehicle’s Battery and Charging System

    A weak battery or charging system can cause erratic behavior in electronic components. Ensure the battery is fully charged and the alternator is functioning properly

  12. 12. Clear Codes and Test Drive

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

  13. 13. Seek Professional Help

    If you are unable to resolve the issue after these steps, it may be best to consult a professional mechanic or technician who specializes in air suspension systems. By following these steps, you should be able to identify the root cause of the C1795 code and take appropriate action to fix the issue