Download - Air Bag Safety Class 1
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Air Bag Safety Class
A.S.T. Training
I nstructor: John Forro
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Copyright 2000 AST Training
Is It Working? (Death Chart)
0
5
10
15
2025
30
35
Belted Unbelted Rear
faced
Safety
seat
Uknown
Children
Audult Drivers
Adult Passangers
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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
ConnectorsSmart System Devices
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Front Crash/Safing Sensors
These devices are usuallylocated in the front grill
area or the kick pad/ firewall areas. They aredesigned to complete acircuit back to the air bagmodule when a hard
enough crash is measured.Most Safing sensors willbe located inside the airbag control module.
Crash Sensor
Magnet
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Air Bag Control Module
The air bag control moduleis almost always located
inside the passengercompartment. There are atleast 1 and sometimes 2more safing sensors locatedinside this unit that must
also close for deploymentto occur. This unit isresponsible for sending thedeploy command to the air
bag.
Safing Sensor
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Clock Springs
Located inside thesteering wheel. This
device is used toconnect the hard wiredair bag harness to thesystems harness while
allowing the steeringwheel to maintain a fullrange of motion.
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Air Bag Circuit Harness and
Connectors. The air bag harness and
connectors are yellow
in color.
DO NOT ATTEMPT
ANY TYPE OF
REPAIRS ON THISCIRCUIT!Typical Air
Bag Harness
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Why did the government mandate theuse of automatic safety devices?
Todays 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
Determine size and weight of individual.
Optical Sensors Determines how close and size of occupant/car seat.
Determines which way the car seat is facing.
Child-Car Seat Sensors
Determines direction of car seat. Occupant Sensors
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 modules capacitors.
2. Use approved testing methods. No ohmmeters
alone.Ohmmeter test voltage could deploy bag.
3. Wear eye protection.
4. Wear safety gloves.
5. Follow manufacturers procedures.
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