Memory System: Description

The memory system consists of power driver's seat, power mirrors and radio presets. The Memory Seat/Mirror Module (MSMM) is located under the driver's seat. It receives input from the following: driver's manual 8-way seat switch, driver's seat position sensors, PCI bus circuits, and the power mirror sensors. The module uses these inputs to perform the following functions: position the driver's memory seat, both exterior mirrors (during recalls), and send/receive the memory system information over the PCI bus.

The Memory Set Switch is wired to the Body Control Module (BCM). A button (either No. 1 or No. 2) pressed on the set switch causes the BCM send a message to the MSMM and to the Adjustable Pedals Module (APM) (if equipped) which in turn send a motion status message back to the BCM. If the message from the MSMM and APM indicates no current motion, the BCM will send a recall message to the modules. The MSMM will set the seat, exterior mirrors and radio to the presets for the indicated driver. The APM will set the adjustable pedals to the memory preset position.

If any one of the memory controlled systems is inoperative from its manual switch, use the schematics and diagnostic information to correct the concern. This manual addresses the memory problems only and it is assumed there is not a basic component failure.