FCA Customer Care
Join Date: Jan 2012
Location: MOPAR World Headquarters
Just some info from the FSM - ignore if not interested:
MEMORY SEAT SYSTEM
An electronic memory seat system is available on certain models. The memory system is able to store and recall all driver side power seat positions and driver outside mirror position. The system can be set for two different drivers. On vehicles with a factory installed radio connected to the Controller Area Network (CAN) data bus network, the memory system is also able to store and recall up to twelve radio station presets (six AM and six FM), for two drivers. The memory system will also store and recall the last station listened to for each driver, even if it is not one of the twelve preset stations.
The memory system will automatically recall all of these settings when a button of the memory switch is depressed, or when the doors are unlocked using the Remote Keyless Entry (RKE) transmitter (if enabled). If the vehicle has more than two drivers the RKE transmitter recall of memory features can be disabled. This is a customer programmable feature of the Electronic Vehicle Information Center (EVIC) set through the use of the appropriate steering wheel switches .
The memory system also has an “Easy Entry and /Exit” feature that provides the driver with more room to enter or exit the vehicle. When the seat is in a memorized position, it will move rearward 60 millimeters or to the end of its travel, whichever occurs first, when the key is removed from the ignition switch lock cylinder. This is also a customer programmable feature of the Electronic Vehicle Information Center (EVIC) set through the use of the appropriate steering wheel switches.
The memory system includes the following components:
Memory Selector Switch - located on the lower left side of the instrument panel, below the air vent.
Driver Door Module (DDM) - located in the driver door, behind the trim panel.
Hall Effect Sensors - Outside Mirror - The hall effect sensor is permanently installed on the outside mirror motor. This hall effect sensor is used to provide a reference signal to the memory seat module, letting the module know the exact position of the mirror.
Sentry Key Remote Entry Module (SKREEM) - located at ignition key cylinder.
Remote Keyless Entry (RKE) Transmitter - located with ignition key.
Memory Seat Module (MSM) - located underneath the driver seat and also controls the Adjustable Pedals.
Hall Effect Sensors - Seat Track - These hall effect sensors are permanently installed in each of the power seat track motors. They are used to provide a reference signal to the memory heated seat mirror module, letting the module know the exact position of the seat cushion and recliner.
Radio - located in the instrument panel center stack.
Certain functions and features of the memory system rely upon resources shared with other electronic modules in the vehicle over the Controller Area Network (CAN) bus. The CAN bus allows the sharing of sensor information. This helps to reduce wire harness complexity, internal controller hardware, and component sensor current loads. At the same time, this system provides increased reliability, enhanced diagnostics, and allows the addition of many new feature capabilities. For diagnosis of these electronic modules or of the CAN bus, the use of a scan tool and the proper diagnostic procedures information are needed.