Network
generic / SAE
U0274
Lost Communication With Lighting Driver Control Module B
The vehicle bus reports loss of communication with lighting driver control module B. LED matrix segments and adaptive headlamp functions driven by this node may default to a fallback beam pattern.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number2 / 74
Possible causes
- Bus wiring open or shorted high
- Module without power or ground medium
- Module failed medium
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–1500 €
- Estimated time: 0.5–3 h
- Component: lighting driver module b
- Component: vehicle bus wiring
- drive cycle required
Sources
References
sae:J2012