Looking for a Airbag diagnostic tool advice

[miro2u]

I need a tool that could read airbag faults either standalone or PC adapter solution but if possible to work on multiple vehicles. Something that could tell me why is airbag light on on a vehicle that has not been in accident. Is it module, impact sensors or seat belts and so on? Point me in right direction please.
Thank You.

[teerak2uk]

loads of units on the market either snapon m2500 which can be bought quite cheap or a solus but most coomon problesm i have had with light on but not been in an accident are either vehicle has flat battery and been jump sarted or more common are connectors under the seat unplug then re plugging normally sort it