Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CEM-B104321

Condition
The central electronic module (CEM) checks the signals from the position sensors.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- The signal from the front position sensor is less than 3 % of the supply voltage.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Voltage supplied sensor.
- Vehicles without Four-C.

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
- Constant light beam length will be used.
- Side control freezes straight ahead.

Possible source
- Contact resistance, oxidation or poor contact in connectors or connections.
- Short-circuit to ground in the signal cable to the front / rear position sensor.
- Open-circuit in the signal cable to the front position sensor.
- Open-circuit in the voltage supply lead to position sensor.
- Damaged sensor.

Fault symptom[s]
- 9T, Headlights/Vertical adjustment not influenced by steering wheel
- DC, Headlights/Headlight aim is off