Memory Systems: Description: Notes

An electronic memory system is available on some models. The memory system is able to store and recall the driver side power seat positions (including the power recliner position) and both outside side view mirrors positions for 2 drivers. On vehicles equipped with a factory radio, the memory system is also able to store and recall 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 preset stations. See OPTIONS USING OVERHEAD CONSOLE under PROGRAMMING  .

The memory system will automatically return to its preset settings when the corresponding numbered button of the memory switch is depressed, or when the doors are unlocked using the corresponding Remote Keyless Entry (RKE) transmitter. A customer programmable feature of the memory system allows the RKE recall of memory features to be disabled, if desired. This programmable feature is internal in the EVIC module, which is located in the overhead console.

A Memory Seat Mirror Module (MSMM) is used on some models to control and integrate the many electronic functions and features included in the memory seat and mirror systems.

The memory system includes the following components:

• Memory Seat Mirror Module (MSMM)
• Memory Set Switch
• Position potentiometers on both outside side view mirrors.
• Position potentiometers on the driver side power seat track and power seat recliner motors.
• Electronic Vehicle Information Center (EVIC)
• Radio receiver (if PCI data bus capable).

Certain functions of the memory system rely upon resources shared with other electronic modules in the vehicle over the Programmable Communications Interface (PCI) J1850 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. Initial diagnosis of these electronic modules or the PCI data bus network requires the use of a DRBIII(R) scan tool. If the method does not prove conclusive, the use of a automotive meter such as the Fluke(R) and the proper wiring schematics are required.

The other electronic modules that may affect memory system operation are as follows:

• Body Control Module (BCM)
• Powertrain Control Module (PCM)
• Transmission Control Module (TCM)