I don't know when or if it changed but my '04 Dodge you turn the key from off to on three times leaving it on and codes will show up in the odometer. If there are no codes or when the codes are done showing it will say "done". I would imagine that the OP's '05 would be the same. Most techs have scanners so they don't bother with it is what my tech buddy tells me. He's still works at an FCA dealership and has been there 20 plus years. He is a great guy and does a lot of restoration work as well.