B2303 – Seat Headrest Feedback Potentiometer Circuit Open

The ODBII 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.

The severity of ODBII code B2303 is generally considered moderate.

Common Causes For: B2302 Seat Headrest Feedback Potentiometer Circuit Failure

• 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 misdiagnosis for B2303 Seat Headrest Feedback Potentiometer Circuit Open

• 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

Common Troubleshooting Steps

When dealing with an OBD-II code B2303, which indicates a problem with the seat headrest feedback potentiometer circuit being open, you can follow these common troubleshooting steps:

• Check the Code: Use an OBD-II scanner to confirm the code. Clear the code and see if it returns after a short drive.
• Visual Inspection:
• Inspect the wiring and connectors associated with the seat headrest feedback potentiometer. Look for any signs of damage, corrosion, or loose connections.
• Check the potentiometer itself for any physical damage.
• Test the Potentiometer:
• 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.
• Check for Shorts or Opens:
• 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.
• Inspect the Seat Control Module:
• 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.
• Check for Ground Issues:
• Ensure that the ground connections for the seat headrest feedback circuit are secure and free of corrosion.
• Test the Circuit:
• With the multimeter, check the voltage supply to the potentiometer when the vehicle is on. Ensure that the correct voltage is present.
• Look for Related Codes:
• Check for any other related trouble codes that might indicate a broader issue with the seat system or other components.
• Consult Service Manual:
• Refer to the vehicle’s service manual for specific testing procedures and specifications related to the seat headrest feedback potentiometer circuit.
• Replace Components if Necessary:
• If you identify a faulty potentiometer, wiring issue, or module, replace the necessary components and clear the codes. 1
• Test Drive:
• 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.