Deck 60: Airbags and Pretensioner Circuits

Question 1

Keeping the ignition key in you pocket can prevent damage to the clockspring during airbag service.

Answer 1

True

Question 2

The occupant detection system re-calibrates at every key cycle.

Answer 2

False

Question 3

During an airbag deployment, the vehicle event data recorder (EDR) will record all of these EXCEPT ________.

A)G-forces
B)Brake on/off
C)Vehicle speed
D)Passenger voice sounds

Answer 3

Passenger voice sounds

Question 4

On a vehicle equipped with an occupant detection system, how much weight is required in the seat before the passenger airbag deploys at full force?

A)Between 10 and 37 lbs
B)More than 40 lbs, but less than 99 lbs.
C)More than 99 lbs.
D)None of these

Question 5

To cause inflation, the closing of the ________ is required to provide the power-side voltage to the inflator module.

A)Forward discriminating sensor
B)Seat Position sensor (SPS)
C)Electronic Frontal Sensor (EFS)
D)Arming sensor

Question 6

Before the airbag can inflate, the squib circuit must have a ground. The ground is provided through the actuation of which of these?

A)Forward discriminating sensor
B)Passenger discriminating sensor
C)Either A or B
D)Seat belt switch

Question 7

Which air bag system component is shown in this illustration?

A)Steering return spring
B)Horn contact
C)Squib
D)Clockspring

Question 8

Which of these is the heating element used to ignite the gas-generating material, usually sodium azide?

A)Element
B)Coil
C)Squib
D)Pretentsioner

Question 9

The force required to deploy a typical airbag is approximately equal to the force of a vehicle hitting a wall at over ________ miles per hour.

A)10
B)3-5
C)15
D)15-10

Question 10

Which of these is an explosive (pyrotechnic) device that tightens the seat belt as the airbag is being deployed?

A)Clockspring
B)Igniter
C)Pretensioner
D)Belt switch

Question 11

Technician A says that two sensors must be triggered at the same time for an airbag deployment to occur. Technician B says that frontal airbags only operate within 60 degrees from center and do not deploy in the event of a side or rear collision. Who is right?

A)Technician A only
B)Neither technician A nor B
C)Technician B only
D)Both technicians A and B

Question 12

Technician A says that air bag electrical terminals are copper-plated to protect against corrosion. Technician B says that pretensioners are explosive (pyrotechnic) devices which remove the slack from the seat belt and help position the occupant. Who is right?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 13

When servicing an air bag, which of these is the first step taken?

A)Disconnect the impact sensors
B)Disconnect the battery negative cable
C)Disconnect the clockspring electrical connector
D)Take resistance measurements at all electrical connectors

Question 14

What enables an air bag to deploy in an accident, even if the battery becomes disconnected during the crash?

A)"Sudden stop" signal received from vehicle speed sensor (VSS)
B)Mechanical push-arm igniter
C)Backup power supply
D)Velocity versus solid object sensor