Question 1

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?
A) A only
B) B only
C) both A and B
D) neither A nor B

Accepted Answer

The answer of Technician A says if the seat belt...

Question 2

Trouble code extraction is being discussed. Technician A says codes may be flashed by the air bag lamp. Technician B says a scan tool may be used. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B

Accepted Answer

Both technicians are correct as trouble codes can be extracted through flashing the air bag lamp or by using a scan tool.

Question 3

The correct procedure for servicing a seat belt pretensioner is to ______.
A) send it out to be rebuilt
B) install an overhaul kit
C) replace it
D) none of these answers is correct

Accepted Answer

Seat belt pretensioners are designed as single-use components and should be replaced, not rebuilt or overhauled, after deployment.

Question 4

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 found to be damaged. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B

Accepted Answer

Air bag modules are typically serviced as complete assemblies, and if one sensor is damaged, it is often recommended to replace all sensors to ensure proper system functionality.

Question 5

______ gas is used to inflate an air bag module.
A) Argon
B) Nitrogen
C) Both "Argon" and "Nitrogen"
D) Neither "Argon" nor "Nitrogen"

Accepted Answer

Nitrogen is used to inflate an air bag module because it is non-flammable and inert. Argon is also a non-flammable gas, but it is more expensive than nitrogen.

Question 6

Technician A says the air bag module can be serviced. Technician B says the inflator assembly is composed of a solid chemical gas generator containing sodium azide propellant. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B

Accepted Answer

The answer of Technician A says the air bag module...

Question 7

A deployed air bag has a powdery residue on it. Technician A says this powder is mainly sodium carbonate and cornstarch. Technician B says it may contain sodium hydroxide. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B

Accepted Answer

Both technicians A and B are correct. The powdery substance found on deployed airbags is mainly sodium carbonate and cornstarch, which helps to lubricate and prevent the bag from sticking. However, the powder may also contain trace amounts of sodium hydroxide, which helps to inflate the airbag quickly.

Question 8

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?
A) A only
B) B only
C) both A and B
D) neither A nor B

Accepted Answer

Technician A is correct. When handling an undeployed air bag module, it should be carried with the trim facing away from your body to prevent injury in case it accidentally deploys. It is also important to handle the module with care and not to touch or carry it by its wires as it may damage the wires and compromise the safety of the air bag system.

Question 9

Which of the following factors is NOT used in determining the intensity of air bag deployment in an adaptive [two stage] air bag system?
A) vehicle speed
B) occupant's weight
C) seat position
D) status of seat belt

Accepted Answer

Vehicle speed is not typically used in determining the intensity of airbag deployment in an adaptive airbag system. These systems usually consider factors like occupant's weight, seat position, and seat belt status to adjust the deployment.

Question 10

An undeployed air bag is being replaced because the trim cover is cut. Technician A says the cover can be replaced. Technician B says the air bag must be deployed before it is scrapped. Who is right?
A) A only
B) B only
C) both A and B
D) neither A nor B

Accepted Answer

The answer of An undeployed air bag is being replaced...

Question 11

Technician A says that the clockspring is located at the bottom of the steering column. Technician B says that the clockspring maintains electrical contact between the inflator module and the rest of the system. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B

Accepted Answer

The clockspring is actually located in the steering wheel, not at the bottom of the steering column, making Technician A's statement incorrect. Technician B is correct because the clockspring does maintain electrical continuity between the steering wheel components, such as the airbag (inflator module), and the vehicle's electrical systems.

Question 12

All of the following are common air bag crash sensor types EXCEPT:
A) mass type
B) roller type
C) hall-effect type
D) accelerometer

Accepted Answer

Mass type, roller type, and accelerometer are all common types of air bag crash sensors. Hall-effect sensors are not typically used as air bag crash sensors.

Question 13

Which of the following tools should be used to test an air bag system?
A) a 12-volt test light
B) AC-powered voltmeter
C) a scan tool
D) AC-powered ohmmeter

Accepted Answer

A scan tool is specifically designed to interface with vehicle systems, including airbag systems, to diagnose and test them safely without risking accidental deployment or damage.

Question 14

Technician A says during a frontal collision, the backup power supply will deploy the air bag if the battery is disconnected. Technician B says all backup power supplies will power down one minute after the negative battery is disconnected. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B

Accepted Answer

Technician A is correct because many vehicles are equipped with a backup power supply for the airbag system, ensuring deployment even if the main battery is disconnected during a collision. Technician B's statement is incorrect as the time for the backup power supply to power down can vary and is not universally one minute after the battery is disconnected.

Question 15

Air bag warning lamps are being discussed. Technician A says an air bag system problem is indicated if the lamp is on while the engine is cranking. Technician B says on some older vehicles a jumper wire placed between two terminals of the DLC can be used to retrieve air bag system codes if a scan tool is not available. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B

Accepted Answer

The answer of Air bag warning lamps are being discussed....

Question 16

Seat belt retractors are being discussed. Technician A says that when the belt is suddenly jerked on a webbing-sensitive retractor system, the retractor should lock up. Technician B says a vehicle-sensitive retractor can only be tested by braking the vehicle at speeds of 5 to 8 MPH. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B

Accepted Answer

The answer of Seat belt retractors are being discussed. Technician...

Question 17

The arrow on an air bag sensor must always face ______.
A) the location of the air bag module
B) the rear of the vehicle
C) the driver's side of the vehicle
D) the front of the vehicle

Accepted Answer

The arrow on an air bag sensor must always face the front of the vehicle to properly detect a collision and activate the air bag module.

Question 18

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?
A) A only
B) B only
C) both A and B
D) neither A nor B

Accepted Answer

The answer of Air bag system service is being discussed....

Question 19

Technician A says two-stage air bags may not always fully deploy. Technician B says two-stage air bags are only used on the driver's side. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B

Accepted Answer

Two-stage air bags may not always fully deploy due to factors such as vehicle speed and crash severity. This is a correct statement made by Technician A. However, Technician B is incorrect in stating that two-stage air bags are only used on the driver's side. Two-stage air bags may be used on both the driver and passenger side, and even in the rear seating area.

Question 20

The event data recorder is located ______.
A) in the air bag module
B) inside the air bag sensor assembly [ASDM]
C) in the BCM
D) all answers are correct

Accepted Answer

The event data recorder is typically located inside the air bag sensor assembly (ASDM), which is responsible for recording data related to airbag deployment and crash events.

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

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?

Trouble code extraction is being discussed. Technician A says codes may be flashed by the air bag lamp. Technician B says a scan tool may be used. Who is correct?

The correct procedure for servicing a seat belt pretensioner is to ______.

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 found to be damaged. Who is correct?

______ gas is used to inflate an air bag module.

Technician A says the air bag module can be serviced. Technician B says the inflator assembly is composed of a solid chemical gas generator containing sodium azide propellant. Who is correct?

A deployed air bag has a powdery residue on it. Technician A says this powder is mainly sodium carbonate and cornstarch. Technician B says it may contain sodium hydroxide. Who is correct?

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?

Which of the following factors is NOT used in determining the intensity of air bag deployment in an adaptive [two stage] air bag system?

An undeployed air bag is being replaced because the trim cover is cut. Technician A says the cover can be replaced. Technician B says the air bag must be deployed before it is scrapped. Who is right?

Technician A says that the clockspring is located at the bottom of the steering column. Technician B says that the clockspring maintains electrical contact between the inflator module and the rest of the system. Who is correct?

All of the following are common air bag crash sensor types EXCEPT:

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

Technician A says during a frontal collision, the backup power supply will deploy the air bag if the battery is disconnected. Technician B says all backup power supplies will power down one minute after the negative battery is disconnected. Who is correct?

Seat belt retractors are being discussed. Technician A says that when the belt is suddenly jerked on a webbing-sensitive retractor system, the retractor should lock up. Technician B says a vehicle-sensitive retractor can only be tested by braking the vehicle at speeds of 5 to 8 MPH. Who is correct?

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

Technician A says two-stage air bags may not always fully deploy. Technician B says two-stage air bags are only used on the driver's side. Who is correct?

The event data recorder is located ______.