Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CEM-B112E13

Condition
The central electronic module (CEM) receives information about the prevailing light conditions from the twilight sensor.
This information is used to determine the light intensity for symbols and the instrument lighting. Two different levels are pre-defined, one for day and one for night.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- Direct voltage from dusk sensor is higher than 4.9 V.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Control module supplied with power.

Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.

Substitute value
- None.

Possible source
- Open-circuit on signal ground cable.
- Short-circuit to supply voltage in the signal cable.
- Contact resistance and oxidation in the terminals.

Fault symptom[s]
- Instrument lighting not operating
- Headlights/Vertical adjustment not influenced by steering wheel