Memory System

MEMORY SYSTEM
The memory system consists of the driver's power seat, power mirrors, adjustable pedals, and radio presets. Refer to Memory Master under Door Modules.
The Memory Heated Seat Adjustable Pedal Module (MHSAPM) or the Memory Seat Adjustable Pedal Module (MSAPM) for vehicles equipped without heated seats are located under the driver's seat.

It receives input from the following:
- driver's seat position sensors
- PCI Bus circuits

The MHSAPM/MSAPM uses these inputs to perform the following functions:
- position the driver's memory seat to the memory preset position
- position the pedals to the memory preset position
- send/receive memory system information over the PCI Bus.

The Memory Set Switch is wired to the Driver Door Module (DDM). After pressing the Memory Set Switch (#1 or #2), the DDM receives and interprets the analog signal and then sends a PCI Bus message to the MHSAPM/MSAPM to set or recall the memory seat position (1 or 2). The MHSAPM/MSAPM in turn sends a motion status message back to the DDM. If the message from the MHSAPM/MSAPM indicates no current motion, the DDM will send a recal message to the modules. In addition to setting seat position, the MHSAPM/ MSAPM will also 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.

MEMORY POWER MIRRORS
Each outside mirror contains vertical and horizontal bi-directional drive positioning motors and position sensors. The Driver Door Module (DDM) and Passenger Door Module (PDM) provide a 5-volt reference on the signal circuit to each position sensor. The sensors share a common ground circuit. The DDM and PDM monitor the position of the mirror motors by measuring the voltage on each signal circuit. When a memory position is set, the DDM and PDM monitor and store the position of the outside mirrors. The DDM and PDM adjust the mirrors to the appropriate positions when a memory recall message is received from the RKE or is requested from the memory recall switch.