Memory Mirror/Seat Module

WARNING: This page is about a different car, the 2002 Dodge Grand Caravan, 2002 Dodge Caravan, 2002 Chrysler Voyager, and 2002 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.

Vehicles equipped with the memory mirror/seat option, utilize a memory module located under the drivers front seat. This module is basically wired in-line between the power seat switch and the power seat track/adjuster motors, or in-line between the power mirror switch and the power side view mirror. The MSMM contains a central processing unit that communicates with other modules on the Programmable Communications Interface (PCI) data bus network.

The Memory Seat/Mirror Module (MSMM) receives hard wired inputs from the driver power seat switch and the potentiometers on each of the driver side power seat track motors, or from the power mirror. The MSMM receives messages over the PCI data bus from the Body Control Module (BCM) (memory switch status), the Powertrain Control Module (PCM) (vehicle speed status). The MSMM will prevent the seat memory recall function from being initiated if the driver side seat belt is buckled, if the transmission gear selector lever is not in the Park or Neutral positions, or if the vehicle is moving.