Question 1

List three items to check when inspecting a seat belt.

Accepted Answer

The webbing; the anchors; the buckle

Question 2

List the three functions of the air bag diagnostic monitor.

Accepted Answer

It controls the instrument panel warning lamp, monitors air bag system components, and provides an energy reserve to deploy the bag if battery voltage is lost during a collision.

Question 3

All the following are components of the air bag module EXCEPT:

Accepted Answer

A)  the squib 
B)  the safing sensor 
C)  the explosive charge 
D)  the bag assembly 
A)  the squib 
B)  the safing sensor 
C)  the explosive charge 
D)  the bag assembly B

Question 4

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

Accepted Answer

A)  two 
B)  three 
C)  four 
D)  five 
A)  two 
B)  three 
C)  four 
D)  five

Question 5

When disarming the air bag system for inspection of sensors, clockspring, or the air bag module, what should be done before the battery is disconnected?

Accepted Answer

Read and r

Question 6

Besides safing [impact] sensors, what other types of sensors are used in an air bag system?

Accepted Answer

seat position
occupa

Question 7

A precollision system uses _____ to detect possible collisions.

Accepted Answer

A)  sonar 
B)  radar 
C)  laser ranging 
D)  optical ranging 
A)  sonar 
B)  radar 
C)  laser ranging 
D)  optical ranging

Question 8

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?

Accepted Answer

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

Question 9

Smart air bag systems usually have three stages of deployment.

Accepted Answer

A) True 
 B)False

Question 10

What is the first step in diagnosing an air bag fault?

Accepted Answer

Observe the operation of the S

Question 11

Wait at least _____ minutes after disconnecting the battery before working on or around the air bag system.

Accepted Answer

A)  five 
B)  ten 
C)  fifteen 
D)  thirty 
A)  five 
B)  ten 
C)  fifteen 
D)  thirty

Question 12

A pyrotechnic-type pretensioner can be tested with a(n) ______.

Accepted Answer

A)  self-powered test light 
B)  digital ohmmeter 
C)  analog ohmmeter 
D)  it cannot be tested 
A)  self-powered test light 
B)  digital ohmmeter 
C)  analog ohmmeter 
D)  it cannot be tested

Question 13

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?

Accepted Answer

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

Question 14

What should be done before disposing a deployed two-stage air bag?

Accepted Answer

Following the manufa

Question 15

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?

Accepted Answer

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

Question 16

The two types of restraint systems are air bags and ____________________.

Accepted Answer

The answer of The two types of restraint systems are...

Question 17

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

Accepted Answer

A)  mass type 
B)  roller type 
C)  hall-effect type 
D)  accelerometer 
A)  mass type 
B)  roller type 
C)  hall-effect type 
D)  accelerometer

Question 18

If a seat belt will not buckle, ______.

Accepted Answer

A)  examine the buckle with a flashlight for foreign objects 
B)  replace the seat belt assembly 
C)  check the fuse in the seat belt warning indicator circuit 
D)  lubricate the buckle mechanism with lithium grease 
A)  examine the buckle with a flashlight for foreign objects 
B)  replace the seat belt assembly 
C)  check the fuse in the seat belt warning indicator circuit 
D)  lubricate the buckle mechanism with lithium grease

Question 19

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

Accepted Answer

A)  send it out to be rebuilt 
B)  install an overhaul kit 
C)  replace it 
D)  none of these answers is correct 
A)  send it out to be rebuilt 
B)  install an overhaul kit 
C)  replace it 
D)  none of these answers is correct

Question 20

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

Accepted Answer

A) True 
 B)False

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

List three items to check when inspecting a seat belt.

List the three functions of the air bag diagnostic monitor.

All the following are components of the air bag module EXCEPT:

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

When disarming the air bag system for inspection of sensors, clockspring, or the air bag module, what should be done before the battery is disconnected?

Besides safing [impact] sensors, what other types of sensors are used in an air bag system?

A precollision system uses _____ to detect possible collisions.

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?

Smart air bag systems usually have three stages of deployment.

What is the first step in diagnosing an air bag fault?

Wait at least _____ minutes after disconnecting the battery before working on or around the air bag system.

A pyrotechnic-type pretensioner can be tested with a(n) ______.

What should be done before disposing a deployed two-stage air bag?

The two types of restraint systems are air bags and ____________________.

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

If a seat belt will not buckle, ______.

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

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

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