WOMS
B code body Medium severity

B2315 Mirror Passenger Horizontal Feedback Potentiometer Circuit Short to Ground

The OBD2 code B2315 indicates a short circuit condition in the passenger side mirror's horizontal feedback potentiometer circuit, which is responsible for detecting the position of the mirror

Definition

The OBD2 code B2315 indicates a short circuit condition in the passenger side mirror's horizontal feedback potentiometer circuit, which is responsible for detecting the position of the mirror

Common causes

  • Damaged wiring or connectors
  • Shorted potentiometer
  • Faulty mirror assembly
  • Corroded connections
  • Grounding issues
  • Water intrusion or moisture damage
  • Faulty control module

Common misdiagnoses

  • Faulty passenger side mirror assembly
  • Defective mirror control switch
  • Wiring harness issues
  • Shorted or damaged wiring
  • Faulty body control module (BCM)
  • Incorrectly calibrated mirror position sensors
  • Issues with the driver’s side mirror controls
  • Software or programming errors in the vehicle's computer system

Troubleshooting steps

  1. 1. Verify the Code

    Use an OBD-II scanner to confirm the presence of the B2315 code. Clear the code and see if it returns after a short drive

  2. 2. Inspect the Wiring and Connectors

  3. 3. Check the wiring harness connected to the passenger side mirror for any visible damage, such as fraying, corrosion, or broken wires

  4. 4. Inspect the connectors for signs of corrosion, dirt, or loose connections. Ensure that all connections are secure

  5. 5. Test the Potentiometer

  6. 6. The potentiometer is part of the mirror assembly and is responsible for providing feedback on the mirror's position. Use a multimeter to test the resistance of the potentiometer

  7. 7. Compare the readings to the specifications in the vehicle's service manual. If the readings are outside the specified range, the potentiometer may be faulty and need replacement

  8. 8. Check for Short Circuits

  9. 9. Use a multimeter to check for continuity between the potentiometer circuit and ground. If you find continuity where there shouldn't be any, there may be a short circuit in the wiring

  10. 10. Inspect the wiring for any points where it may be pinched or damaged, causing a short to ground

  11. 11. Inspect the Mirror Assembly

  12. 12. If the wiring and potentiometer check out, inspect the entire mirror assembly for any internal faults. Sometimes, the mirror motor or internal components can fail and cause feedback issues

  13. 13. Check the Body Control Module (BCM)

  14. 14. The BCM may be responsible for processing the signals from the mirror. If all other components are functioning correctly, consider checking the BCM for faults or software issues

  15. 15. Perform a Visual Inspection

  16. 16. Look for any signs of water intrusion or other environmental damage that could affect the electrical components

  17. 17. Consult Technical Service Bulletins (TSBs)

  18. 18. Check for any TSBs related to the B2315 code for your specific vehicle make and model. Manufacturers may have issued guidance or fixes for known issues

  19. 19. Reassemble and Test

  20. 20. After making any repairs or replacements, reassemble the components and clear the code. Test the system to see if the issue persists

  21. 21. Seek Professional Help

  22. 22. If you are unable to resolve the issue after these steps, consider seeking assistance from a professional mechanic or an automotive technician who has experience with electrical systems. By following these steps, you should be able to diagnose and potentially resolve the issue related to the B2315 code