B0071 - Body Fault Code B0071 - 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 B0071 indicates a circuit malfunction, communication issue, or calibration fault within the Passenger Occupant Detection System (ODS/PPS) or Passenger Seat Belt Tension Sensor (BTS). The Airbag Control Module (SDM/RCM) continuously monitors reference voltages, analog load-cell return signals, and LIN-bus data telegrams from the Occupant Classification Module. If the return signal is out of defined range (<0.2V or >4.8V) or zero-point calibration parameters are corrupted/missing, B0071 is stored and the passenger frontal airbag deployment is disabled.
Possible Causes
1. Glappkontakt, böjda stift eller oxidering i det gula kontaktdonet under passagerarsätet till följd av sätesjustering.
2. Behov av nollpunktskalibrering (Zero Point Calibration / Passenger Re-zero) efter sätesdemontering, klädselbyte eller mekanisk överbelastning.
3. Defekt bältesspänningssensor (Belt Tension Sensor) integrerad i bälteslåset/förankringen.
4. Skadad eller internt avbruten sensormatta / töjningsgivare (Strain gauge) i sätesdynan.
5. Hårdvarufel i passagerarklassificeringsmodulen (OCM) eller krockkuddestyrdonet (SDM/RCM).
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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