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lmccoig
modified 7 years ago

Automobile Airbag Tester

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02:26:24
Airbag Warning:disconnecting the battery in the vehicle does not necessarily remove the chance of the airbags deploying. Some systems have backup supplies which are designed to allow the system to work properly even if the battery is destroyed in the accident. In simulator, left airbag circuit has resistor and is disconnected from air bag on right where LED diode is shown. Old style auto probe test lights can draw significant current. One test lamp is rated for 0.33 amps of current.  One of the most popular test lights from Snap-On, uses the 205120 lamp. Its current rating is 0.05 amps. Smart computer and test lamps may draw less than 21 mA at 12 volts DC. over operating range 3-28 volts. The red light to indicate positive polarity, green indicates a negative polarity.  If the deceleration is great enough, the accelerometer triggers the air bags to deploy. The newer generation of frontal airbags deploy with 20-to-35 percent less force than older cars. On old-style airbag wires are generally (but NOT always) marked with yellow loom or tape and likely have yellow connector housings. If you probe one of these wires (which may be in virtually ANY factory wiring harness anywhere in the vehicle), and set off a single airbag or all it can be dangerous and thousands of dollars expensive. The airbag tester shown in simulator is for when computer code says it detects airbag problem.  You NEVER test actual airbag with current.  Disconnect auto battery, unplug suspect airbag, connect 2.4-2.6 ohm resistor to car wiring harness.  Reconnect battery and see if trouble code again shows up on on board diagnostic computer.  Hopefully,  it will not be more than one airbag at a time and you can find with airbag is causing the codes to set. Do not hold airbag in your hand and set it off with 9 volt battery.  Mistakes can kill when around air bags!
published 7 years ago

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.

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