There is a "Power Seat Module" (PSM) computer tied into the car's CANbus network. The PSM is part of the Integrated Memory System (IMS) which is the memory that remebers your seat positions, steering
wheel position, mirrors, etc. IMS looks like it's located in the central tunnel - roughly between the center
armrest/storage area and the shift lever. The IMS "tells" modules installed in the front seat when to "set" either memory or "replay" the seat to a stored position... there are a lot of electronic boxes scattered about a Genesis sedan. The factory manuals are not particularly clear on what function/features are physically implemented in each box, nor where the command signals originate. Including how the DIS "system" menu settings (which is where the seat easy access ON/OFF setting lives on Tech package cars) get to the modules.
When you put the transmission into Park and shut the engine off... what happens to the steering
wheel, seat positions, etc? With "steering
wheel easy access ON" the steering
wheel tilts UP (but not in/out - no telescope change) and "seat easy access ON" makes the driver seat move rearwards. Does your car do either of these? Easy access ON or OFF can be set for the steering and seat individually - you could have either one, neither, or both move for example when the engine is turned OFF.
Then, when you get into the car and press START, the motions should reverse. The seat should move back to wherever it was when you shut the engine OFF - not necessarily to memory position 1 or 2 for example. If you move the shift lever before the seat finishes moving, the seat will stop instantly - and that'll become the new remembered position. Same for the steering
wheel tilt... so let them finish moving before shifting out of park.
So exactly what does your car do when you shut it off... and what does it do when you re-START it? And is it a "Tech" package car?
The ON/OFF settings for seat and steering
wheel can be set by the dealer's service computer for non-Tech cars. It's part of the "variant" settings in the service computer's menus. For Tech cars, these settings are stored in the "DIS" (Driver Information System) head unit which is the "master" part of the stereo+Nav system; it's the part with the CD/DVD changer.
mike c.