See also:

Battery
The battery supplies power to start the engine and operate any additional electrical accessories. - To avoid break–down or failure to start the vehicle, maintain a battery with full cranking ...

Cooling System
When it is safe to lift the hood: A. Engine Cooling Fan (Out of View) B. Engine Coolant Surge Tank and Pressure Cap WARNING An electric engine cooling fan under the hood can start up even ...

Additional Factors Affecting System Operation
Safety belts help keep the passenger in position on the seat during vehicle maneuvers and braking, which helps the passenger sensing system maintain the passenger airbag status. See “Safety Belts ...