CEM-1A52

Condition
If control unit registers that communication with the driver door module (DDM) does not work, diagnostic trouble code CEM-1A52 is displayed.

Condition
None

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

Condition
- A door does not lock/open
- Electric window lift on driver side does not work.