C1873 Air Suspension RF Air Spring Solenoid Output Circuit Failure

Definition

Common causes

• Faulty air spring solenoid
• Damaged wiring or connectors
• Short circuit in the solenoid circuit
• Open circuit in the solenoid circuit
• Failed air suspension control module
• Corrosion or poor connections
• Air spring leakage or failure
• Faulty relay or fuse related to the air suspension system

Common misdiagnoses

• Faulty air spring
• Defective air compressor
• Wiring issues or shorts
• Bad relay
• Faulty suspension control module
• Air line leaks
• Incorrectly calibrated height sensors

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 right front air spring solenoid. Look for signs of damage, corrosion, or loose connections

3. 3. Continuity Test

   Use a multimeter to test for continuity in the wiring. Ensure there are no breaks in the wire

4. 4. Test the Solenoid

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

5. 5. Resistance Check

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

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 diagnostic test on the module to ensure it is functioning correctly

8. 8. Inspect the Air Spring

   Check the right front air spring for leaks or damage. A compromised air spring can affect the solenoid's operation

9. 9. Check for Ground Issues

   Ensure that the ground connections for the air suspension system are secure and free of corrosion. A poor ground can lead to circuit failures

10. 10. Review the Vehicle’s Power Supply

    Verify that the air suspension system is receiving the correct voltage. Check the fuses related to the air suspension system to ensure they are intact

11. 11. Clear Codes and Test Drive

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

12. 12. 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 C1873 code and take appropriate action to fix the issue