When you do the key dance to read codes in the EVIC/Odometer, it only reads the codes stored in the PCM and some of the codes stored in the TCM.
There are a lot of codes for other controllers and the rest of the codes in the TCM that will never show. And the cheap scan tool that big franchise auto stores use, don't read anymore than what the key dance spits out, although they have stored information in the tool to associate with the code to tell you what the code means, instead of looking it up.
You need the proprietary tool from Chrysler to read airbag codes, that means either going to the dealer, or if you're lucky an independent repair shop near you has invested the big bucks to hae the proprietary tool or very expensive universal tool that can do almost everything the proprietary tools can, most can't afford it, or you have to pay the $8k bucks youself for the tool, that could be done with laptop and adapter cable, if chrysler would allow to happen, which they don't, NOR do any of the manufacturers.
That means you most likely will have to go to the dealer and pay them a fee, up to an hour labor, to spend the 2 minutes to hook up the tool and press a button to read the code. If no code is stored, which is possible, you still have to pay the fee and get nothing out of it.
My '02 Mini-Van still has an airbag light, I can't bring myself to pay the $100 the local dealers want to just pull it into the service bay and read the code and tell me what it is. The light does go out on occassion, it seems to be associated with temperature, when the temperature is below freezing it will go out, as the vehicle warms up, it will come back on again.
Keep in mind, the air bag system is like the Evap Purge System, the Federal Government has set unrealistic standards for the system, resulting in some ridiculous self-tests, so a perfectly good system can fail self-tests and still be good working order, and you can spend a lot of time, money and aggrevation in multiple visits trying to track down the non-problem causing the self-test to fail. For air-bags we are talking they do things like test resistance in circuits and throw a warning light if they are off a couple of ohms. OR, your airbag may NOT work at all, you really don't know, you just get a light, and it could be one of the non-problems or a real problem, unfortunately that is the only way the engineers could get the system certified with the ridiculous standards the Fed's set.