From Ross-Tech Wiki
01329 - Convenience System Data Bus in Emergency Mode
- Wiring and/or Connectors faulty
- Door Control Module(s) faulty
- Check/Repair Wiring and/or Connectors
- Check/Replace Door Control Module(s)
- This fault code describes that the Convenience System Data Bus is operating in Single Wire mode.
- You can check the door control modules by disconnecting all of them and reconnecting them one after another, while checking the comfort system meas. blocks regarding the data bus status.