Toyota 89952-35011 Computer, Occupant Detection

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All models are equipped with a Supplemental Restraint System (SRS), commonly known as an Air Bag, to protect the driver and front seat passenger in a head-on or frontal collision. The system includes Air Bag Sensor, an Air Bag Control Module in the steering wheel and instrument panel, and a sensing/diagnostic module. Some models also have side impact airbags and side curtain airbags. The driver's side airbag inflates instantly when an electrical signal is sent, while the passenger's side airbag is larger and mounted above the glove compartment. Side impact airbags are in the seat backs, and side curtain airbags come out of the headliner to protect all passengers. The sensing and diagnostic module checks the airbag system's operation at every vehicle start. Caution must be taken when handling airbag modules, and specific procedures vary for component removal and installation.

First of all, the system comprises airbags in the steering wheel and instrument panel, impact sensors, and a diagnostic module. Some models also include knee, side, and curtain airbags. The airbag modules, containing the cushion and inflator, receive an electrical signal. The passenger airbag is above the glove compartment. The diagnostic module powers the system and checks its operation at start-up. Side and curtain airbags are activated by sensors during side impacts. Precautions include disarming the SRS before work, careful handling of modules, avoiding resistance measurement, and proper disposal.

The system includes impact sensors behind the front bumper, an airbag module in the steering wheel and instrument panel, and a sensing/diagnostic module in the center of the vehicle. Some models also have side impact airbags and side curtain airbags.

The sensing and diagnostic module supplies current to the airbag system and checks its operation upon vehicle start-up.

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