Exam 48: Restraint Systems: Theory, Diagnosis, and Service

Most side impact air bag systems are deployed from the ____________________ or the outside of the ____________________.

A pretensioner may use an explosive charge to retract the seat belt.

Technician A says that an air bag module is serviced as an assembly. Technician B says that it is acceptable to replace all the sensors if one is damaged. Who is correct?

Some vehicles have a switch that allows the driver's side air bag to be turned off.

Technician A says when the SIR warning light is illuminated all the time, there is a fault code stored in the SIR control module. Technician B says if the warning light is on, the air bag system is turned off and the air bag will not deploy in an accident. Who is correct?

A live air bag must be deployed before disposal.

Technician A says if the seat belt retractor does not retract when the belt is disconnected, the retractor must be replaced. Technician B says if a seat belt is cut, it must be replaced. Who is correct?

What is the function of a knee bolster (knee diverter)?

Any seat belt that has color fading due to exposure to the sun or chemicals should be replaced.

Which of the following tools should be used to test an air bag system?

The arrow on an air bag sensor must always face ______.

Side head protection air bags stay inflated for about five seconds to offer protection against a second or third impact.

A precollision system uses _____ to detect possible collisions.

Air bag safety is being discussed. Technician A says to always carry an undeployed air bag module with the trim facing away from your body. Technician B says to carry the air bag module by its wires. Who is correct?

Air bag system service is being discussed. Technician A says an air bag simulator can be installed in place of the air bag thereby allowing accurate testing of the circuits without the fear of accidental air bag deployment. Technician B says sensors are checked by back-probing the connector. Who is correct?

To prevent accidental deployment, most air bag systems require that at least _____ sensor switches are closed before an air bag can be deployed.

The air bag control module determines whether the seat is occupied by a child, adult, or a child in a booster seat by inputs from the _____ sensor.

Some vehicles are equipped with two-stage force limiter type belt pretensioners.

Why are adaptive and two-stage air bags (second generation)used on modern vehicles?

Second-generation air bag systems are being discussed. Technician A says a second-generation air bag inflates with about 20 to 35 percent more energy than first-generation ones. Technician B says second-generation air bags reduce the number of injuries caused by the air bag itself. Who is correc t?