Grand Cherokee 2WD Limited V8-4.7L (2002)
Power Seat Switch: Description and Operation
Memory Set Switch
Fig.12 WJ/WG Memory Select/Set Switch
MEMORY SET SWITCH
Vehicles equipped with the memory system have a memory switch mounted to the driver side front door trim panel. This switch is used to set and
recall all of the memory system settings for up to two drivers. The memory switch is a resistor multiplexed unit that is hard wired to the Driver Door
Module (DDM), which is also located on the driver side front door trim panel. The DDM sends out the memory system set and recall requests to the
other electronic modules over the Programmable Communications Interface (PCI) data bus.
The memory switch cannot be adjusted or repaired and, if faulty or damaged, it must be replaced. For complete circuit diagrams, refer to Wiring
Diagrams.
The memory switch has three momentary switch buttons labeled Set, 1 and 2. The Driver 1 and Driver 2 buttons are back-lit with Light-Emitting
Diodes (LED) for visibility, and are also color-coded to coincide with the color-coded Driver 1 and Driver 2 Remote Keyless Entry (RKE)
transmitters. The Driver 1 memory switch button and RKE transmitter are black, and the Driver 2 memory switch button and RKE transmitter are
gray. The memory switch Set button also has an LED that will illuminate and flash to indicate that the memory system is in the set mode. This LED
will automatically be extinguished when a set request has been successfully completed.
See the owner's manual in the vehicle glove box for more information on the features, use and operation of the memory switch. For diagnosis of the
memory switch, the DDM or the PCI data bus, the use of a DRB scan tool and the proper Diagnostic Procedures are recommended.
