Lost Communication with Mirror Control Module
The body bus has lost the exterior mirror module. Folding, heating, dimming or memory functions of the mirrors stop working.
Affected components
- Mirror module
- Lin wiring
Common causes
- High likelihood: LIN wire to mirror open
- Low likelihood: Gateway module routing CAN messages incorrectly
- Low likelihood: CAN terminating resistor (120 Ω) drifted out of spec
Possible symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.