Key Removal Inhibit
WARNING: This page is about a different car, the 2016 RAM 3500 HD and 2016 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
The Key Removal Inhibit has a motor driven gear internal to the IGNM to facilitate this feature. This prevents the key from going past accessory (to off) if the gear shifter is not in Park.