Memory System Description - Chrysler 1999 300M V6-3.5L VIN G Service Manual

Memory System Description

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The memory system consists of power left front seat, power mirrors and radio presets. The memory heated seat/mirror module (MHSMM) also includes the heated seat function. The module is located under the left front seat and receives input from:

- left manual 8-way seat switch
- left seat position sensors
- memory switch
- both heated seat switches
- both heated seat negative temperature coefficients (NTC's) thermistors
- PCI bus circuit
- the power mirror sensors

The module uses these inputs to perform the following functions: position the left front seat, position drivers memory seat and mirrors, actuate the drivers and passenger healed seat heater and send the memory location over the PCI bus.

When a memory button is pressed (either #1 or #2) on the memory switch the MHSMM sends a message to the BCM which in turn sends a recall message to the MHSMM and the PCI radio. They will in turn position the left seat and both mirrors along with setting the radio presets.