WOMS
B code body Medium severity

B1957 Seat Front Up/Down Potentiometer Feedback Circuit Short To Ground

The OBD2 code B1957 indicates a malfunction in the front seat's up/down potentiometer feedback circuit, specifically that there is a short to ground, which means the circuit is improperly connected to the ground,...

Definition

The OBD2 code B1957 indicates a malfunction in the front seat's up/down potentiometer feedback circuit, specifically that there is a short to ground, which means the circuit is improperly connected to the ground, affecting the seat adjustment functionality

Common causes

  • Damaged wiring or connectors in the potentiometer circuit
  • Shorted potentiometer
  • Faulty seat control module
  • Corroded or loose electrical connections
  • Grounding issues in the circuit
  • Malfunctioning seat adjustment switch

Common misdiagnoses

  • Faulty seat control module
  • Wiring issues or shorts in the harness
  • Defective seat potentiometer
  • Corroded connectors
  • Malfunctioning body control module
  • Incorrectly calibrated seat position sensors
  • Software or firmware issues in the vehicle's control systems
  • Battery or power supply problems

Troubleshooting steps

  1. 1. Scan Tool Verification

    Use an OBD-II scanner to confirm the 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 seat adjustment system. Look for any signs of damage, fraying, or corrosion

  4. 4. Check the potentiometer itself for physical damage or wear

  5. 5. Check the Potentiometer

  6. 6. Test the potentiometer for proper resistance values. You can do this using a multimeter. The resistance should change smoothly as the seat is adjusted

  7. 7. If the potentiometer is faulty, it may need to be replaced

  8. 8. Inspect Ground Connections

  9. 9. Check the ground connections for the seat adjustment system. Ensure that they are clean, tight, and free of corrosion

  10. 10. Use a multimeter to test for continuity between the ground point and the vehicle's chassis

  11. 11. Wiring Continuity Test

  12. 12. Perform a continuity test on the wiring between the potentiometer and the control module. Look for any breaks or shorts in the wiring

  13. 13. If you find a short to ground, trace the wiring to locate the source of the short

  14. 14. Check the Control Module

  15. 15. If the wiring and potentiometer are in good condition, the issue may lie within the control module itself. Check for any software updates or known issues with the module

  16. 16. If necessary, test the control module for proper operation or consider replacing it

  17. 17. Clear Codes and Test Drive

  18. 18. After performing repairs, clear the trouble codes using the OBD-II scanner

  19. 19. Take the vehicle for a test drive to see if the code returns. Monitor the seat adjustment function to ensure it operates correctly

  20. 20. Professional Help

    If you are unable to resolve the issue after these steps, consider seeking assistance from a professional mechanic or an automotive technician who specializes in electrical systems. By following these steps, you should be able to diagnose and potentially resolve the issue related to the B1957 code