B0331 - Body Fault Code B0331 - Belysningssystem & Strålkastarreglering
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System
Body (Interior, Lighting, Comfort)
Related Fault Codes
Technical Description
DTC B0331 is logged by the Headlamp Control Module (HCM) or Body Control Module (BCM) when the drive circuit, position feedback potentiometer, or LIN communication link to the headlight leveling actuator indicates an out-of-range condition, circuit discontinuity, or failure during initialization calibration sweeps.
Possible Causes
1. Fukt- eller oxidangrepp i strålkastarens externa anslutningskontakt eller inuti ställdonets hölje.
2. Defekt ställdon/stegmotor (utbränd drivmotor eller sliten integrerad återkopplingspotentiometer).
3. Mekaniskt fel: Avhoppad kulled mellan ställdonets tryckstång och reflektorskålen.
4. Avbrott eller kortslutning i ledningsnät mellan BCM/HCM och respektive strålkastare.
Recommended Solution
Workflow
Mechanic's Tip
Before replacing expensive components, always double-check wiring and connections. 80% of all sensor faults are actually due to corroded contacts or broken wires.
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