VOLVO
CEM-B101288 - Left Headlamp Control. Bus Signal / Message Failures. Bus off
Układ
Centralny moduł elektroniczny (CEM)
Modele Volvo, których dotyczy ten kod błędu
Dotyczy następujących modeli:
2 modeleV40 (2013–), V40 Cross Country (2013–)
Pokaż modele wg rocznika i silnika (2)
Co oznacza ten kod błędu?
This fault concerns the left main headlamp control unit (LHCU), which the central electronic module (CEM) communicates with over the LIN bus. The fault is stored when the bus is shorted to voltage or earth, which affects the headlamp adjustment.
Możliwe przyczyny
- LIN bus shorted to voltage or earth
- Damaged left main headlamp control unit (LHCU)
Co możesz zrobić
- 1With the ignition off, check that the wiring to the left headlamp has no chafing, pinching or contact with the body
- 2With the ignition off, use a multimeter to check whether the LIN wire to the left headlamp has contact with earth or voltage
- 3Check that the connectors to the headlamp are secure and not corroded
- 4Clear the fault code and road test to see whether it returns
- 5If the fault remains, have a workshop isolate the bus and check the left headlamp control unit, as this needs diagnostic equipment and sometimes new software
Objawy, które możesz zauważyć3
- Headlamp side adjustment does not follow the steering wheel correctly, or does not work
- Headlamp height adjustment is wrong or does not work
- Main beam with automatic high beam control does not work
Na co może wpływać usterka2
- The light range stays fixed at one constant level
- Side adjustment is locked in the straight-ahead position
Ogólne wskazówki dla właścicieli. Diagnostyka na samochodzie może wskazać inną przyczynę.