Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2012PRIUS THREEREPAIR AND DIAGNOSISRESTRAINTSAIR BAG, SRSOCCUPANT CLASSIFICATION SYSTEM (EXCEPT PLUG-IN) (DIAGNOSTIC CODES & SYMPTOM TESTS)
2012 Toyota Prius Three
Occupant Classification System (Except Plug-In) (Diagnostic Codes & Symptom Tests)
2012 Toyota Prius ThreeSECTION Occupant Classification System (Except Plug-In) (Diagnostic Codes & Symptom Tests)
- Occupant Classification System
- DTC B1771: Passenger Side Buckle Switch Circuit Malfunction
- DTC B1780: Front Occupant Classification Sensor LH Circuit Malfunction
- DTC B1781: Front Occupant Classification Sensor RH Circuit Malfunction
- DTC B1782: Rear Occupant Classification Sensor LH Circuit Malfunction
- DTC B1783: Rear Occupant Classification Sensor RH Circuit Malfunction
- DTC B1785: Front Occupant Classification Sensor LH Collision Detection
- DTC B1786: Front Occupant Classification Sensor RH Collision Detection
- DTC B1787: Rear Occupant Classification Sensor LH Collision Detection
- DTC B1788: Rear Occupant Classification Sensor RH Collision Detection
- DTC B1790: Center Airbag Sensor Assembly Communication Circuit Malfunction
- DTC B1793: Occupant Classification Sensor Power Supply Circuit Malfunction
- DTC B1794: Open in Occupant Classification ECU Battery Positive Line
- DTC B1795: Occupant Classification ECU Malfunction
- DTC B1796: Sleep Operation Failure of Occupant Classification ECU
- Symptom Test
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.