CEM-1A54

Condition
If control unit registers that communication with the power seat module (PSM) does not work, diagnostic trouble code CEM-1A54 is displayed.

Condition
None

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

Condition
- Power seat does not operate
- Automatic seat-adjuster does not work.