Lost Communication with Mirror Control Module
2000-2002 Rolls-Royce Corniche 6.75L V8 🇨🇦
Description
Cannot communicate with the power mirror or auto-dimming mirror control module.
Symptoms
- Mirror adjustment not working
- Auto-dimming not functioning
- Mirror memory not working
- Auto-fold mirrors disabled
Common Causes
- Mirror module failure
- Wiring issue
- Module power loss
- Fuse blown
- Mirror motor failure
Diagnostic Steps
- Check mirror module fuse
- Test power and ground
- Inspect door jamb wiring
- Test mirror motors
- Check mirror switch
Repair Notes
Check door jamb wiring. Mirror wiring passes through flex point and commonly breaks.
Related Codes
Other Network Codes
- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- U0006High Speed CAN Communication Bus (-) Open
- U0007High Speed CAN Communication Bus (-) Low
- U0008High Speed CAN Communication Bus (-) High
- U0009High Speed CAN Communication Bus Shorted Together
- U0010Medium Speed CAN Communication Bus
U0204 on Other Vehicles
Rolls-Royce Cullinan
2019-2024 6.75L V12 Twin Turbo
Rolls-Royce Dawn
2016-2024 6.6L V12 Twin Turbo
Rolls-Royce Ghost
2010-2024 6.6L V12 Twin Turbo
Rolls-Royce Phantom VII
2003-2017 6.75L V12
Rolls-Royce Phantom VIII
2018-2024 6.75L V12 Twin Turbo
Rolls-Royce Silver Seraph
1998-2002 5.4L V12
Rolls-Royce Silver Spirit
1990-1998 6.75L V8
Rolls-Royce Silver Spur
1990-1998 6.75L V8
Common Questions
What does code U0204 mean on a 2000-2002 Rolls-Royce Corniche?
U0204 stands for "Lost Communication with Mirror Control Module". Cannot communicate with the power mirror or auto-dimming mirror control module.
What are the symptoms of U0204 on a Rolls-Royce Corniche?
Common symptoms of U0204 include: Mirror adjustment not working, Auto-dimming not functioning, Mirror memory not working, Auto-fold mirrors disabled.
What causes U0204 on a 2000-2002 Rolls-Royce Corniche?
Common causes of U0204 include: Mirror module failure, Wiring issue, Module power loss, Fuse blown, Mirror motor failure.