CEM-1A5A

Condition
If the central electronic module (CEM) registers that communication with the rear electronic module (REM) does not work, diagnostic trouble code CEM-1A5A is displayed.

Condition
None

Possible source
- No power supply to REM control unit
- Contact resistance in the connectors
- Open circuit on the CAN bus
- Defective REM control unit.

Condition
- Rear window heating does not work
- Collapsible head restraint does not work
- A door does not lock/open
- The boot lid will not lock/open.