B1963 – Seat Horizontal Forward/Rearward Potentiometer Feedback Circuit Open

The ODBII code B1963 indicates a malfunction in the seat’s horizontal forward/rearward potentiometer feedback circuit, specifically that the circuit is open, meaning there is a break or disconnection in the electrical path affecting the seat adjustment function.

The severity of ODBII code B1963 is moderate.

Common Causes For: B1962 Seat Horizontal Forward/Rearward Potentiometer Feedback Circuit Failure

• Faulty seat position potentiometer
• Damaged wiring or connectors in the feedback circuit
• Corroded or loose electrical connections
• Failed seat control module
• Short circuit in the wiring harness
• Malfunctioning seat adjustment motor
• Software issues in the vehicle’s control module

Common misdiagnosis for B1963 Seat Horizontal Forward/Rearward Potentiometer Feedback Circuit Open

• Faulty seat motor
• Bad wiring or connectors
• Defective seat control module
• Malfunctioning body control module
• Incorrectly calibrated seat position sensor
• Issues with the power supply to the seat system
• Software or firmware issues in the vehicle’s control systems

Common Troubleshooting Steps

When dealing with an OBD-II code B1963, which indicates a problem with the seat horizontal forward/rearward potentiometer feedback circuit being open, you can follow these common troubleshooting steps:

• Verify the Code: Use an OBD-II scanner to confirm that the B1963 code is present. Clear the code and see if it returns after a short drive.
• Inspect the Wiring and Connectors:
• Check the wiring harness connected to the seat potentiometer for any signs of damage, such as fraying, corrosion, or disconnection.
• Inspect the connectors for bent pins, corrosion, or loose connections. Ensure that all connections are secure.
• Test the Potentiometer:
• Locate the seat potentiometer (usually part of the seat adjustment mechanism).
• Use a multimeter to measure the resistance across the potentiometer terminals. Compare the readings to the specifications in the vehicle’s service manual.
• If the potentiometer is faulty, it may need to be replaced.
• Check for Short Circuits:
• Inspect the wiring for any shorts to ground or power. Use a multimeter to check for continuity and ensure that the circuit is not shorted.
• Inspect the Seat Control Module:
• If the wiring and potentiometer are functioning correctly, the issue may lie with the seat control module. Check for any fault codes related to the module.
• If necessary, test the module according to the manufacturer’s specifications.
• Check for Ground Issues:
• Ensure that the ground connections for the seat adjustment system are secure and free of corrosion. A poor ground can cause feedback circuit issues.
• Look for Related Codes:
• Check for any other related trouble codes that may provide additional context for the issue. Sometimes, multiple codes can point to a common problem.
• Consult the Service Manual:
• Refer to the vehicle’s service manual for specific diagnostic procedures and specifications related to the seat adjustment system.
• Perform a Visual Inspection:
• Look for any signs of water intrusion or damage in the area where the seat control module and potentiometer are located.
• Test Drive:
• After performing repairs or adjustments, take the vehicle for a test drive to see if the code returns. If you are unable to resolve the issue after these steps, it may be advisable to consult a professional mechanic or technician who has experience with your specific vehicle make and model.