Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CEM-7A03

Condition




The central electronic module (CEM) checks the signal from the Volume- button.
The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) registers that the Volume- button has been active for more than 1 minute.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute value
- None.

Possible source
- The Volume- button is jammed in the pressed in position
- Damaged Volume- button.

Fault symptom[s]
- The radio buttons on the steering wheel do not function
- The phone buttons on the steering wheel do not work.