The resistance for the air bag circuits are 2.5 ohms; some other circuits may vary so this tool is for main airbag circuit testing. Wear eye and hand protection when using the pin probes, they are extremely sharp.
How do you measure the resistance of an airbag?
https://www.youtube.com/watch?v=uAklUlvAIrs
Is it safe to test a airbag with a multimeter?
The explosive charge in an air bag is triggered by a current from the collision sensors in the car. Simply put, the ohmmeter will set off the airbag, destroying the airbag, the car's dash, and quite possibly badly injuring the technician.
What force do airbags use?
This ignites the charge, often solid pellets of sodium azide (NaN3), which explodes. The explosion produces nitrogen gas (N2~) that fills the deflated nylon airbag (packed in your steering column, dashboard or car door) at about 200 miles per hour. The whole reaction takes a mere 1/25 of a second.11 Jan 2016
Can you Ohm a airbag?
Simply put, the ohmmeter will set off the airbag, destroying the airbag, the car's dash, and quite possibly badly injuring the technician. The explosive in an airbag is equal in power to a shotgun shell. Most ohmmeters have a 9volt battery which is fed through the Leads and current flow is used to calculate the ohms.
What can cause a resistance too high DTC?
CAUSE: Tension on the wire harness connector under the driver's or front passenger's seat could cause high resistance in the driver or passenger side airbag circuits.
What is high resistance in airbag?
The airbag igniter resistance should be around 2 Ohms. Anything less than 2 Ohms, the SRS/Airbag module would indicate resistance too low, anything greater than 2 Ohms, the SRS/Airbag module would indicate resistance too high.12 Jan 2016
What does resistance too low mean?
Low resistance allows more current to flow and vice versa. It can be due to static or dynamic load. Static load can be resistor, heating coil etc. Dynamic load, for e.g. is electric motor load. Depending upon mechanical loading, motor offers dynamic load or resistance to the electrical power supply.
What causes low resistance in a airbag?
An open or shorted circuit, or low resistance in the passenger airbag. An open or shorted circuit, or low resistance in one or both of the clocksprings. Damaged wires, harnesses, or other electrical components. Dust or contamination in one of the clockspring assemblies.
Can you test a crash sensor?
Testing of an airbag sensor is possible, but should not be done. The only way you safely should test an airbag sensor is to use an automotive diagnostic tool to read the airbag control unit's trouble codes and live data.14 Dec 2021
How much resistance does an airbag have?
I have not run across very many airbag systems on which any of the bags circuits measured a normal 2-4Ω. There are some that are as high as 7Ω, but again they are rare. Either way, you can dial your pot from 1 to 10 ohms, stepping in 1Ω increments to cover your bases if the bag resistance value is not known.31 Dec 2019