WOMS
P code powertrain Medium severity

P1853 Transmission Transfer Case Contact Plate 'B' Short Circuit To Ground

The OBD2 code P1853 indicates a short circuit to ground in the contact plate 'B' of the transmission transfer case, which can affect the operation of the transfer case and its related functions

Definition

The OBD2 code P1853 indicates a short circuit to ground in the contact plate 'B' of the transmission transfer case, which can affect the operation of the transfer case and its related functions

Common causes

  • Damaged wiring or connectors
  • Faulty transfer case contact plate
  • Short circuit in the wiring harness
  • Corroded connectors
  • Water intrusion or moisture in the electrical system
  • Faulty transmission control module (TCM)
  • Poor ground connections

Common misdiagnoses

  • Faulty transfer case control module
  • Wiring issues or damaged harness
  • Faulty transfer case motor
  • Incorrectly diagnosed transmission issues
  • Battery or electrical system problems
  • Faulty sensors related to the transfer case
  • Software or calibration issues in the vehicle's ECU

Troubleshooting steps

  1. 1. Read the Codes

    Use an OBD-II scanner to confirm the P1853 code and check for any additional codes that may provide more context about the issue

  2. 2. Visual Inspection

  3. 3. Inspect the wiring and connectors associated with the transfer case contact plate. Look for signs of damage, fraying, corrosion, or loose connections

  4. 4. Check the condition of the contact plate itself for any physical damage or wear

  5. 5. Check for Short Circuits

  6. 6. Use a multimeter to test for continuity in the wiring harness. Disconnect the battery and the connectors to the contact plate before testing

  7. 7. Check for continuity between the contact plate terminals and ground. A short circuit will show continuity where there shouldn't be any

  8. 8. Inspect the Transfer Case Control Module (TCCM)

  9. 9. If applicable, check the TCCM for any signs of damage or corrosion. Ensure that it is properly connected and functioning

  10. 10. Test the Contact Plate

  11. 11. If possible, test the contact plate itself for proper operation. This may involve checking resistance values or other specifications as outlined in the vehicle's service manual

  12. 12. Check Ground Connections

  13. 13. Ensure that all ground connections related to the transfer case and contact plate are clean, tight, and free of corrosion

  14. 14. Repair or Replace

  15. 15. If you identify damaged wiring, repair or replace it as necessary

  16. 16. If the contact plate is faulty, replace it with a new one

  17. 17. If the TCCM is found to be defective, consider replacing it

  18. 18. Clear Codes and Test Drive

  19. 19. After making repairs, clear the trouble codes using the OBD-II scanner

  20. 20. Take the vehicle for a test drive to see if the code returns. Monitor the vehicle's performance to ensure that the issue has been resolved

  21. 21. If the problem persists, consult the vehicle's service manual for specific diagnostic procedures related to the transfer case and contact plate

  22. 22. Seek Professional Help

  23. 23. If you are unable to resolve the issue after following these steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these steps, you should be able to diagnose and potentially resolve the issue related to the P1853 code