B0054 - Body Fault Code B0054 - SRS / Krockkuddar (Airbag Förar/Passagerar/Sido/Gardin)
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System
Body (Interior, Lighting, Comfort)
Related Fault Codes
Body Fault Code B0001 - SRS / Krockkuddar (Airbag Förar/Passagerar/Sido/Gardin)
Body Fault Code B0002 - SRS / Krockkuddar (Airbag Förar/Passagerar/Sido/Gardin)
Body Fault Code B0003 - SRS / Krockkuddar (Airbag Förar/Passagerar/Sido/Gardin)
Body Fault Code B0004 - SRS / Krockkuddar (Airbag Förar/Passagerar/Sido/Gardin)
Technical Description
DTC B0054 indicates an electrical malfunction in the Passenger Seatbelt Sensor/Buckle Switch circuit. The Restraint Control Module (RCM/SDM) monitors the circuit using a dedicated reference voltage to detect buckled/unbuckled states via resistance shifts or current-sink levels. The DTC is flagged when the circuit impedance deviates beyond calibrated thresholds (open circuit, short to ground, or short to 12V), compromising seatbelt status feedback and deployment logic.
Possible Causes
1. Glappkontakt eller oxiderade terminaler i kontaktdonet under passagerarstolen orsakat av stolsrörelser/fukt.
2. Defekt mikrobrytare eller intern Hall-effektsensor i bälteslåset (Seatbelt Buckle Switch).
3. Avbrott eller klämskada i kablaget mellan stolens golvgenomföring och bälteslåset.
4. Skada i RCM (Restraint Control Module) internt drivsteg / ADC-krets (mindre vanligt).
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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