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.
Center Air Bag Sensor Assembly (Prius)
Center air bag sensor assembly delivers an input signal to Hybrid Vehicle (HV) control Electronic Control Unit (ECU) if an airbag is deployed. Hybrid vehicle control ECU is referred to as HV ECU. The HV ECU then delivers input signal to Engine Control Module (ECM). If air bags are deployed, ECM will stop fuel pump operation by opening the circuit opening relay. This operation is referred to fuel cut control. If fuel cut control has been activated, turning ignition switch from OFF position to ON position cancels the fuel cut control operation and fuel pump will operate. Center air bag sensor assembly may also be referred to as air bag sensor assembly.
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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.