Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CEM-B103C86

Condition
The Central Electronic Module (CEM) both transmits and receives information via a standardised serial communication method - LIN (Local Interconnect Network). The control module checks the communication with the Left headlamp control unit (LHCU).
The diagnostic trouble code (DTC) is stored if the control module detects that:
- Incorrect data during communication with the left headlamp control unit (LHCU).
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Ignition on or engine running.
- Battery voltage between 9 - 16 V.

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.
- Damaged Left headlamp control unit (LHCU).

Fault symptom[s]
- 9T, Headlights/Vertical adjustment not influenced by steering wheel
- DC, Headlights/Headlight aim is off
- IV, Text window and warning symbol/Text message