Memory Seat System

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

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 the drivers side view mirror positions. 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 twenty radio station presets (ten AM and ten FM), also for two drivers. The memory system also will store and recall the last station listened to for each driver, even if it is not one of the twenty 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 FOBIK transmitter (if enabled). If the vehicle has more than two drivers the FOBIK transmitter recall of memory features can be disabled. This is a customer programmable feature of the EVIC.

The memory system also has a easy exit feature that will move the driver seat rearward 55 millimeters or to the end of its travel, whichever occurs first, when the key is removed from the ignition switch lock cylinder. This is a customer programmable feature of the overhead console.

The memory system includes the following components:

Memory Selector Switch - located in the driver seat trim panel.
Driver Door Module (DMM) - located in the driver door, behind the trim panel.
Passenger Door Module (PDM) - located in the passenger door, behind the trim panel.
Hall Effect Sensors - Drivers Mirror - The hall effect sensor is permanently installed on the drivers side view mirror motor. This hall effect sensor is used to provide a reference signal to the memory heated seat mirror module, letting the module know the exact position of the mirror.
Wireless Integration Node (WIN) or Keyless Ignition Node (if equipped) - located at ignition key cylinder.
FOBIK Transmitter - located with ignition key.
Memory Seat Module (MSM) - located underneath the driver seat, also controls the Adjustable Pedals and Mirrors.
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.
Automatic Temperature Control (ATC) - 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 information are needed.