WOMS
C code chassis Medium severity

C1796 Air Suspension RR Air Spring/Shock Solenoid Output Circuit Open

The OBD2 code C1796 indicates that there is an open circuit in the output circuit for the rear right air spring or shock solenoid in the air suspension system, which means the solenoid is not receiving the necessary...

Definition

The OBD2 code C1796 indicates that there is an open circuit in the output circuit for the rear right air spring or shock solenoid in the air suspension system, which means the solenoid is not receiving the necessary electrical signal to operate

Common causes

  • Open circuit in the wiring
  • Faulty air spring/shock solenoid
  • Poor electrical connections or corroded terminals
  • Damaged or frayed wiring harness
  • Failed air suspension control module
  • Blown fuse related to the air suspension system
  • Grounding issues in the circuit

Common misdiagnoses

  • Faulty air spring or shock absorber
  • Bad air compressor
  • Damaged wiring or connectors
  • Faulty air suspension control module
  • Incorrectly calibrated height sensors
  • Air leaks in the suspension system
  • Low air pressure in the system
  • Faulty relay or fuse related to the air suspension system

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: Check the wiring harness and connectors associated with the rear air suspension system. Look for signs of damage, fraying, corrosion, or loose connections

  3. 3. Connector Condition

    Ensure that all connectors are securely attached and free of dirt or moisture

  4. 4. Test the Solenoid

    Resistance Check: Use a multimeter to measure the resistance of the solenoid. Compare the reading to the manufacturer’s specifications. If the resistance is out of range, the solenoid may be faulty

  5. 5. Power Supply Check

    Verify that the solenoid is receiving the correct voltage when activated. This may require activating the suspension system and measuring voltage at the solenoid connector

  6. 6. Check the Air Suspension Control Module

    Inspect the air suspension control module for any signs of damage or corrosion

  7. 7. If possible, perform a reset or reprogramming of the module to see if that resolves the issue

  8. 8. Inspect the Air Springs and Shock Absorbers

    Check the rear air springs and shock absorbers for leaks or damage. A leak can cause the system to malfunction and trigger the code

  9. 9. Test the Ground Connections

    Ensure that all ground connections related to the air suspension system are clean and secure. Poor grounding can lead to circuit issues

  10. 10. Perform a System Calibration

    Some vehicles may require a calibration or reset of the air suspension system after repairs. Consult the vehicle’s service manual for specific procedures

  11. 11. Check for Software Updates

    Verify if there are any software updates available for the vehicle’s control modules. Sometimes, manufacturers release updates that can resolve known issues

  12. 12. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the air suspension system for your specific vehicle make and model. These bulletins can provide valuable information 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 technician who specializes in air suspension systems.Conclusion By following these troubleshooting steps, you can systematically identify and address the cause of the C1796 code. Always refer to the vehicle’s service manual for specific diagnostic procedures and specifications