Memory Inhibit/Enable
WARNING: This page is about a different car, the 1998 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
Memory Mirror Module (MMM) receive park gear and ignition inputs via class 2 messages. When ignition switch is off, memory record, memory recall, personalization recall, and exit recall functions are allowed. When ignition is on and gearshift lever is in Park, only personalization recall is deactivated and all other memory functions are allowed. When ignition is on and gearshift is out of Park, memory record is allowed, but all other memory functions are deactivated.