Memory Seat System: Notes
An electronic memory and heated seat system is standard on some 300M. The memory system is able to store and recall the driver side power seat positions (including the power recliner position), and both outside power mirror positions for 2 drivers. The memory system is also able to store and recall up to 20, 10 AM and 10 FM, radio station presets for 2 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 20 preset stations. The radio display will show which memory position is being recalled.
The memory system will automatically return to all of these settings when the corresponding numbered and button of the memory switch on the driver side seat side shield is depressed, or when the doors are unlocked using the Remote Keyless Entry (RKE) transmitter. A customer programmable feature of the memory system allows the RKE recall of memory features to be disabled in cases where there are more than 2 drivers of the vehicle.
The memory system also has a customer programmable easy exit feature that will move the driver seat rearward 2" (55 mm) or to the end of its travel, whichever occurs first, when the key is removed from the ignition switch lock cylinder.
A Memory Heated Seat/Mirror Module (MHSMM) is used on some models to control and integrate the many electronic functions and features included in the memory/heated seat system.
The memory system includes the following components:
- MHSMM
- Memory set/selector switch
- Position potentiometers on both outside power mirrors
- Position potentiometers on the driver power seat track and power seat recliner motors
- Radio receiver
- Electronic Vehicle Information Center (EVIC)
- Memory seat switch
- Programmable Communications Interface (PCI) data bus network
Certain functions and features of the memory system rely upon resources shared with other electronic modules in the vehicle over the Programmable Communications Interface (PCI) data bus network. The PCI data bus network 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 PCI data bus network, a DRBIII(R) scan tool is used. See BODY CONTROL MODULES - CONCORDE, INTREPID & 300M article.