Module - Seat Memory
MODULE-SEAT MEMORYDESCRIPTION
NOTE: The scan tool standardization process must be performed on the Memory Seat Module (MSM) any time a new module is installed or the existing module is reflashed.
The Memory Seat Module (MSM) is located underneath the driver seat, towards the front and on the outboard side. It is used in conjunction with the other modules in the memory system to recall the seat to one of two preset seat functional adjustments (horizontal, vertical, and recliner). The switch for the memory seat programming and selection mounts on the driver door trim panel. The MSM also controls the adjustable pedals, both for the memory and manual functionality. The adjustable accelerator and brake pedals are available on SLT and Limited models. On Limited, their positioning can be stored for recall by the memory system, allowing for two drivers to have unique, pre-programmed settings.
OPERATION
POWER/MEMORY SEAT
The memory seat module receives input from the 8-way power seat switch, the driver seat position sensors, adjustable pedal control circuits (switch, sensor, and motor), and the data bus circuit. The memory switch, is wired to the memory mirror module which sends the message over the data bus.
The memory seat module performs the following functions:
- Positions the driver seat (vertical, horizontal, and recliner positions) and adjustable pedals.
- Sends the memory save or recall (#1 or #2) command over the data bus circuit to the memory mirror modules, HVAC, and radio.
- Provides for "linking" the key FOBs to memory.
- Provides for the easy entry/exit feature.
- Provides the tilt mirrors in reverse feature
When a memory button is pressed (#1 or #2) on the memory switch, the driver door memory mirror module sends a recall message to the memory seat module (MSM). Then the MSM will position the driver seat and adjustable pedals to its preprogrammed location/setting. When the Remote Keyless Entry (RKE) Transmitter button is pressed, depending on which transmitter (#1 or #2), the SKREEM (RKE Receiver) sends the recall request and FOB number (#1 or #2) data message. This RKE transmitter function depends on if the MSM is programmed to trigger the recall (linked FOBs).
A memory setting is saved by pressing the "set" button, then pressing either the memory "1" or "2" button within 5 seconds of pressing the "set" button.
A memory setting is recalled by pressing either the memory "1" or "2" button, or by pressing the unlock button on a "linked" Remote Keyless Entry (RKE) transmitter.
For driver safety, memorized settings can not be recalled if the transmission is in any position other than park or the seat belt is latched.
A key FOB is "linked" to a memory setting by pressing the "set" button and then pressing either the memory "1" or "2" button within 5 seconds of pressing the set button, then by pressing the "lock" button on the selected key FOB.
The memory system "Easy Entry and /Exit" feature provides the driver with more room to enter or exit the vehicle. The Easy Entry and Exit feature is disabled when the vehicle leaves the factory. An authorized dealer can enable this feature. When the seat is in a memorized position, it will move rearward 55 millimeters or to the end of its travel, whichever occurs first, when the key is removed from the ignition switch lock cylinder. The seat will return to the memory position when the driver turns the vehicle's ignition switch out of the LOCK position.
The memory system "learns" the seat and adjustable pedal motor maximum end positions when the motor reaches the limit of travel in any direction and stalls. Subsequently, movement will stop just short of that position to avoid extra stress on the motors and mechanisms. If the system learned a maximum position as a result of an obstruction, as for instance if a large object was placed on the floor behind the seat, the system can relearn the "true" maximum position through manually operating the power seat after the obstruction is removed.
NOTE: It is normal for the power accessories contained in the memory system to stop at the maximum "learned" position and then continue to the "true" maximum position when the control switch is released and then applied in the same direction a second time.
Certain functions and features of the memory system rely upon resources shared with other electronic modules in the vehicle over the Controller Area Network (CAN) bus. The CAN bus 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 CAN bus, the use of a scan tool and the proper diagnostic information are needed.
The tilt mirrors in reverse feature provides for tilting the sideview (outside) mirrors down a predetermined angle, providing a better view of the ground next to the rear portion of the vehicle. The tilt mirrors in reverse feature is disabled when the vehicle leaves the factory. An authorized dealer can enable this feature. Operation of the tilt mirrors is as follows:
- Sideview mirrors will tilt down when the vehicle transmission is shifted into Reverse.
- Sideview mirrors will return to the original position when the vehicle transmission is shifted out of Reverse.