WOMS
B code body Medium severity

B1955 Seat Front Up/Down Potentiometer Feedback Circuit Open

The OBD2 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...

Definition

The OBD2 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

Common causes

  • 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 misdiagnoses

  • 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

Troubleshooting steps

  1. 1. 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

  2. 2. 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

  3. 3. Connector Check

    Ensure that all connectors are securely attached and free of dirt or corrosion. Disconnect and reconnect them to ensure a good connection

  4. 4. 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

  5. 5. Voltage Check

    Check the voltage supply to the potentiometer while the seat is being adjusted. Ensure that the voltage is within the specified range

  6. 6. 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

  7. 7. If possible, perform a reset or reprogramming of the module according to the manufacturer’s specifications

  8. 8. 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

  9. 9. 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

  10. 10. 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

  11. 11. 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

  12. 12. 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