WOMS
U code network Medium severity

U0207 Lost Communication With Movable Roof Control Module

The OBD2 code U0207 indicates a loss of communication with the movable roof control module, suggesting that the vehicle's diagnostic system is unable to communicate with the module responsible for controlling the...

Definition

The OBD2 code U0207 indicates a loss of communication with the movable roof control module, suggesting that the vehicle's diagnostic system is unable to communicate with the module responsible for controlling the movable roof

Common causes

  • Faulty Movable Roof Control Module
  • Damaged wiring or connectors
  • Corroded terminals
  • Poor ground connection
  • Faulty communication network (CAN bus issues)
  • Software or firmware issues
  • Blown fuses related to the module
  • Intermittent electrical connections

Common misdiagnoses

  • Faulty movable roof control module
  • Wiring issues or damaged connectors
  • Battery or power supply problems
  • Faulty body control module
  • Software or programming issues
  • Faulty switches or sensors related to the roof system
  • Grounding issues in the electrical system

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 other issues affecting the communication

  2. 2. Inspect the Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors associated with the movable roof control module for any signs of damage, corrosion, or loose connections

  3. 3. Repair or Replace

    If you find any damaged wires or connectors, repair or replace them as necessary

  4. 4. Check the Movable Roof Control Module

    Location: Identify the location of the movable roof control module in your vehicle

  5. 5. Connections

    Ensure that the module is properly connected and that there are no loose or corroded pins

  6. 6. Module Condition

    If possible, test the module for functionality. This may require specialized equipment or a professional diagnostic tool

  7. 7. Inspect the CAN Bus System

    Communication Lines: The movable roof control module communicates over the CAN (Controller Area Network) bus. Inspect the CAN bus wiring for any issues

  8. 8. Termination Resistors

    Ensure that the CAN bus has the proper termination resistors and that they are functioning correctly

  9. 9. Check for Power and Ground

    Power Supply: Verify that the movable roof control module is receiving the correct voltage and that the power supply is stable

  10. 10. Ground Connections

    Ensure that the ground connections for the module are secure and free of corrosion

  11. 11. Perform a Network Scan

    Use a professional scan tool to perform a network scan of the vehicle’s modules. This can help identify if other modules are experiencing communication issues that may affect the movable roof control module

  12. 12. Reset the System

    After performing inspections and repairs, clear the trouble codes using the OBD-II scanner and see if the code returns after a test drive

  13. 13. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the movable roof control module for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

  14. 14. Seek Professional Help

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or dealership for further diagnosis. They may have access to advanced diagnostic tools and resources.Conclusion Troubleshooting the U0207 code involves a systematic approach to check for communication issues, inspect wiring and connections, and ensure that the movable roof control module is functioning correctly. Following these steps can help you identify and resolve the problem effectively