SRS Systems

Component Identification

100

Identify whether this is an active or passive system and explain why.

Active system - the driver has to manually make an effort to use it 

200

Name 3 of the 4 airbags you see in this image 

1: Front Airbags

2: Side Airbags

3: Curtain Airbags

4: Knee Airbags

300

Identify this component 

Pressure Sensor 

400

Identify this component and where it would be located in the vehicle

Clockspring

In steering column behind airbag module

500

Identify this component. Explain why it's either passive or active.  

Inertia Lock Retractor

Passive - the system operates automatically 

SRS Systems

100

Tech A says a seat belt should be replaced if the webbing is bowed or frayed. Tech B says the seatbelt should be replaced if the color has faded from sun exposure. Who is correct?

Tech A only

Tech B only

Both 

Neither

Tech A only

200

Second-generation air bags may contain how many explosive charges?

A: one

B: two

C: four

D: eight

B: two

300

Tech A says that the srs module assembly will disarm the air bag if certain faults occur. Tech B says the passenger air bag may be turned off if not enough weight is on the seat. Who is correct?

Tech A only

Tech B only

Both 

Neither

Both

400

Tech A checks the clockspring connections for signs of damage when replacing a deployed airbag. Tech B backprobes an air bag system to determine if it's in good working order. Who is correct?

Tech A only

Tech B only

Both 

Neither

Tech A only

(wow would that be bad)

500

******** DOUBLE JEOPARDY **********

Tech A removes the positive battery cable before servicing any component in the air bag system. Tech B waits 1 minute before handling an airbag after disconnecting its battery. Who is correct?

Tech A only

Tech B only

Both 

Neither

Neither

(Negative terminal, wait 10-30 minutes depending on vehicle)

Diagnostics & Handling

100

SRS system connectors/wires are universally colored _______ often with gold terminals.

Yellow

200

Which of the following statements about the SRS warning lamp is NOT true?

1. When the ignition is first turned on, the indicator should turn on and remain on for 6 seconds.

2. If the system is able to work correctly, the lamp will stay on.

3. If the lamp flashes off and on again, low source voltage may be indicated.

4. A system problem is indicated when the lamp does not turn on at all. 

If the system is working correctly, the lamp will stay on.

300

Tech A says an airbag should be placed on a work surface face-down to avoid scratching the face of the module. Tech B says an airbag should be held facing away from the technician to prevent accidental deployment. Who is correct?

Tech A only

Tech B only

Both 

Neither

Tech B only

400

A compressed gas is often used to deploy air bags. What is the gas?

A: Sulfur-Dioxide

B: Helium

C: Oxygen

D: Argon

D: Argon

500

A powdery substance released from the air bag when it's deployed is sodium hydroxide, which can cause which of these:

A: Skin Irritation

B: Burns

C: Hearing Loss

D: All of these

A: Skin Irritation

Prior Chapters

100

Identify this suspension in the picture 

MacPherson Strut 

200

Identify this suspension in the picture

Short-Long Arm (SLA)

300

Identify this form of tire wear and what can cause it

Under-Inflated tires causing both inside/outside tread wear, center tread mostly intact

400

What is considered minimum tread depth? 

3/32nds

500

Approximately what is the life span of a TPMS sensor? 

5-10 years

Trivia

100

Which of these is statements is true?

A: Airbags deploy at approximately 200 mph. (Equal to high performance race cars) 

B: Airbags produce a sound at approximately 150 dB. (Equal to Jet engines and rockets)

C: Airbags are tested between 8 mph to 35 mph. (30-50 G's on impact)

D: All of these are true.

D: All of these are true 

(Info sourced by NHTSA) 

200

Seat belt buckles should be very easy to disengage in case of emergencies. How much pressure should be required to unclip a seatbelt buckle?

approx. 2 pounds of force 

300

****** DOUBLE JEOPARDY *******

What is the duration of time between the vehicle detecting an impact and the airbag fully deploying?

40 milliseconds (0.04 seconds)

400

What is the duration of time between the airbag deploying and completely deflating?

2 seconds

500

***** DOUBLE JEOPARDY ******

In 2006, all vehicles were required to have this system installed in the passenger seat for infants, children, and small adults and deploy with 20-35% less force. What is the name of this system?

Adaptive SRS (Dual-Stage Airbags)