you hook up scanner to the vehicle, it scans all the modules. if there is an update for a specific system, a message will show that an update is available.(this is using mopar equipment, aftermarket tools won't tell you this)

If the dealer runs the vin number,the vehicle history can be checked and all dealer service will show up. if The module has been updated, there will be a service record of it.

There is a quick learn that can be run. there's NO telling when that was done, doesn't hurt to run it. you need a scan tool to do it though.