WOMS
B code body Medium severity

B2303 Seat Headrest Feedback Potentiometer Circuit Open

The OBD2 code B2303 indicates a malfunction in the seat headrest feedback potentiometer circuit, specifically that the circuit is open, meaning there is a break or disconnection in the electrical path affecting the...

Definition

The OBD2 code B2303 indicates a malfunction in the seat headrest feedback potentiometer circuit, specifically that the circuit is open, meaning there is a break or disconnection in the electrical path affecting the headrest adjustment system

Common causes

  • Faulty headrest feedback potentiometer
  • Open or damaged wiring in the circuit
  • Poor electrical connections or corroded terminals
  • Malfunctioning seat control module
  • Software issues in the vehicle's control system
  • Grounding issues in the circuit

Common misdiagnoses

  • Faulty headrest motor
  • Wiring issues or shorts in the harness
  • Defective seat control module
  • Malfunctioning body control module
  • Incorrectly calibrated seat position sensors
  • Issues with the power supply to the seat system
  • Faulty connectors or terminals in the circuit

Troubleshooting steps

  1. 1. Check the Code

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

  2. 2. Visual Inspection

  3. 3. Inspect the wiring and connectors associated with the seat headrest feedback potentiometer. Look for any signs of damage, corrosion, or loose connections

  4. 4. Check the potentiometer itself for any physical damage

  5. 5. Test the Potentiometer

  6. 6. Use a multimeter to measure the resistance of the potentiometer. It should fall within the manufacturer's specified range. If it reads open (infinite resistance), the potentiometer may be faulty and need replacement

  7. 7. Check for Shorts or Opens

  8. 8. Inspect the wiring harness for any shorts to ground or open circuits. Use the multimeter to test continuity in the wires leading to the potentiometer

  9. 9. Inspect the Seat Control Module

  10. 10. If the wiring and potentiometer are in good condition, the issue may lie within the seat control module. Check for any fault codes related to the module and inspect its connections

  11. 11. Check for Ground Issues

  12. 12. Ensure that the ground connections for the seat headrest feedback circuit are secure and free of corrosion

  13. 13. Test the Circuit

  14. 14. With the multimeter, check the voltage supply to the potentiometer when the vehicle is on. Ensure that the correct voltage is present

  15. 15. Look for Related Codes

  16. 16. Check for any other related trouble codes that might indicate a broader issue with the seat system or other components

  17. 17. Refer to the vehicle’s service manual for specific testing procedures and specifications related to the seat headrest feedback potentiometer circuit

  18. 18. Replace Components if Necessary

  19. 19. If you identify a faulty potentiometer, wiring issue, or module, replace the necessary components and clear the codes. 1

  20. 20. Test Drive

  21. 21. After repairs, take the vehicle for a test drive to ensure the code does not return and that the seat headrest functions correctly. If you are not comfortable performing these steps or if the issue persists after troubleshooting, it may be best to consult a professional mechanic for further diagnosis and repair