B1955 – Seat Front Up/Down Potentiometer Feedback Circuit Open

The ODBII code B1955 indicates a malfunction in the front seat up/down potentiometer feedback circuit, specifically that the circuit is open, meaning there is a break or disconnection in the electrical path that prevents proper signal transmission from the seat adjustment mechanism.

The severity of ODBII code B1955 is moderate.

Common Causes For: B1954 Seat Front Up/Down Potentiometer Feedback Circuit Failure

• Faulty seat position potentiometer
• Open circuit in wiring or connectors
• Corroded or damaged connectors
• Short circuit in the wiring
• Faulty seat control module
• Poor ground connection
• Intermittent electrical connection

Common misdiagnosis for B1955 Seat Front Up/Down Potentiometer Feedback Circuit Open

• Faulty seat control module
• Wiring issues or shorts
• Defective seat motor
• Malfunctioning body control module
• Incorrectly calibrated seat position sensors
• Battery or power supply issues
• Faulty connectors or terminals
• Software or firmware issues in the vehicle’s control systems

Common Troubleshooting Steps

When dealing with an OBD-II code B1955, which indicates a problem with the “Seat Front Up/Down Potentiometer Feedback Circuit Open,” there are several common troubleshooting steps you can follow to diagnose and potentially resolve the issue. Here’s a structured approach:

• Check for Additional Codes: Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are multiple issues.
• Inspect the Wiring and Connectors: **Visual Inspection: Look for any visible damage to the wiring harness connected to the seat adjustment motor and potentiometer. Check for frayed wires, corrosion, or loose connections.
• **Connector Check: Ensure that all connectors are securely attached and free of dirt or corrosion. Disconnect and reconnect them to ensure a good connection.
• Test the Potentiometer: **Resistance Check: Use a multimeter to measure the resistance of the potentiometer. It should change smoothly as you move the seat up and down. If it shows an open circuit or inconsistent readings, the potentiometer may be faulty.
• **Voltage Check: Check the voltage supply to the potentiometer while the seat is being adjusted. Ensure that the voltage is within the specified range.
• Inspect the Seat Control Module: If the wiring and potentiometer are functioning correctly, the issue may lie within the seat control module. Check for any signs of damage or malfunction.
• If possible, perform a reset or reprogramming of 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 lead to erratic behavior and open circuit codes.
• Test the Seat Motor: If the potentiometer and wiring are fine, test the seat motor itself. It may be malfunctioning, which can cause the feedback circuit to register as open.
• Consult Wiring Diagrams: Refer to the vehicle’s service manual for wiring diagrams to understand the circuit better. This can help identify any other components that may be involved in the feedback circuit.
• Perform a System Reset: After addressing any issues, clear the trouble codes using the OBD-II scanner and perform a test drive to see if the code returns.
• Seek Professional Help: If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has access to specialized diagnostic tools and equipment.Conclusion By following these troubleshooting steps, you should be able to identify the cause of the B1955 code and take appropriate action to resolve the issue. Always refer to the specific vehicle’s service manual for detailed procedures and specifications.