Transcript Air Bag Safety Class - Gem State Gymnastics Academy

Air Bag Safety Class
A.S.T. Training
Instructor: John Forro
Why do we need airbags?
 Federal Government mandate in 1989 states that we
need some sort of automatic occupant safety device.

Choice #1 is an automatic safety belt feature.



Choice #2 (Air Bag)



Very costly
High failure rate
Universal production
Better safety choice
Choice #3 = Both (Best)
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Is It Working? (Death Chart)
35
30
25
20
15
10
5
0
Children
Audult Drivers
Adult Passangers
Belted Unbelted Rear Uknown
faced
Safety
seat
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Popular Beliefs T or F?
 Very costly
 Unsafe for technicians to service
 Unsafe residue
 Killing machines for short people (10 inch
rule)
 A lot of accidental discharges in shops
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What should we tell our
customers?
 Wear safety belt at all times.
 Pay attention to idiot lights
 Make passengers buckle up.
 Sit appropriately
 Strap child in correctly
 Drive safely!!!
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How does this system work?
1.
Vehicle is involved in a 10 MPH or higher front end
collision.
2.
At least 1 crash or safing sensor and 1
momentum/deceleration sensor activated. A safing
sensor is another safety inertia type sensor located
inside the control module. This sensor is used to
prevent unwanted deployments.
3.
Signal sent to air bag module to deploy bag.
4.
Module deploys air bag in less the 7 ms on drivers
side conventional systems.
5.
Nitrogen gasses released through vent holes in back of
bag, bag deflates.
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What are the typical
components in this system?
Air Bags
Air Bag Module
Crash/Safing Sensors
Clock Spring
System Wiring and
Connectors
Smart System Devices
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Front Crash/Safing Sensors
Crash Sensor
Magnet
 These devices are usually
located in the front grill
area or the kick pad/ fire
wall areas. They are
designed to complete a
circuit back to the air bag
module when a hard
enough crash is measured.
Most Safing sensors will
be located inside the air
bag control module.
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Air Bag Control Module
Safing Sensor
 The air bag control module
is almost always located
inside the passenger
compartment. There are at
least 1 and sometimes 2
more safing sensors located
inside this unit that must
also close for deployment
to occur. This unit is
responsible for sending the
deploy command to the air
bag.
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Air Bag Assembly
 There could be as many as 14 of
these air bags located throughout
the vehicle. The main assembly
is located in the steering wheel.
This units main purpose is to
protect the passengers and driver
in the event of a crash. These
could be inflated at different
speeds depending on size and
weight of occupants.
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Clock Springs
 Located inside the
steering wheel. This
device is used to
connect the hard wired
air bag harness to the
systems harness while
allowing the steering
wheel to maintain a full
range of motion.
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Air Bag Circuit Harness and
Connectors.
Typical Air
Bag Harness
 The air bag harness and
connectors are yellow
in color.
 DO NOT ATTEMPT
ANY TYPE OF
REPAIRS ON THIS
CIRCUIT!
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Why did the government mandate the
use of automatic safety devices?
 Today’s vehicles are built to collapse in a
collision.
 Occupant safety is the #1 concern.
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What does the future hold?
 Smart Systems

Seat Sensors

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Optical Sensors
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Determines direction of car seat.
Occupant Sensors
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Determines how close and size of occupant/car seat.
Determines which way the car seat is facing.
Child-Car Seat Sensors

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Determine size and weight of individual.
Determines if someone is present by measuring for body heat.
Air Bag Curtains

Designed to protect the entire passenger compartment.
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Universal Servicing Procedures
1. Disconnect the negative battery cable for at least
10 minutes to discharge module’s capacitors.
2. Use approved testing methods. No ohmmeter’s
alone. Ohmmeter test voltage could deploy bag.
3. Wear eye protection.
4. Wear safety gloves.
5. Follow manufacturers’ procedures.
Copyright 2000 AST Training
Copyright 2000 AST Training