Memory Seat

MEMORY SEATS
The memory system consists of the driver power seat both outside rear view mirrors and the radio presets. The memory module for the seat is mounted under the driver's seat. The module is available with or without the heated seat feature. The seat module receives input from the 8-way power seat switch the driver's seat position sensors both front seat negative temperature coefficients (NTC's) (if heated seat equipped) and the PCI bus circuit. The memory switch located on the driver door is wired directly to the driver door module and sends its messages over the PCI bus. The memory seat module performs the following functions: position the drivers seat actuate the drivers and passengers seat heaters (if equipped) and sends the memory location over the PCI bus.

When a memory button is pressed (#1 or #2) or the memory switch the driver door module sends c recall message to the memory seat module (MSM) the PCI radio and the passenger door module. They will in turn position the driver seat both mirror and set the radio presets. When the RKE button is pressed depending on which transmitter (#1 or #2) the passenger door module sends the recall message.

Power Seat
The memory power seat provides the driver with 2 position settings for the driver's seat. Each power seat motor is connected to the MSM with two circuits. Each circuit is Switched between battery and ground. By alternating the circuits the MSM controls the movement of the motors based on input from the seat mounted switch.

Each motor contains a potentiometer to monitor the seat position. To monitor the position of the motor; the MSM sends out a 5-volt reference on the sensor supply circuit. The sensor is grounded back to the module on a common ground circuit. Based on the position of the sensor the MSM monitors the voltage change through the sensor on a separate signal circuit.

The MSM stores the input value of each of the four seat potentiometers in memory when the system is requested. The driver can initiate memory recall using either the memory switch or the RKE transmitter. When initiated the MSM adjusts the four seat motors to match the memorized seat position data.

For safety reasons the memory seat recall is disabled by the MSM when the vehicle is out of park position or if the seatbelt is buckled. Any obstruction to seat movement over a 2 second delay will cause the seat to stop moving in which case a stalled motor would be detected by the MSM which would then flag a trouble code and the corresponding seat output would be deactivated. However if the object obstructing the seat is removed the seat will function normally again.