Memory Set/Recall Operation

The driver seat adjuster motors are equipped with internal potentiometer type position sensors. The adjuster motor position sensors are monitored by the DSM and are used to determine the seat position when storing or recalling memory settings. The front vertical, rear vertical, horizontal, and recline position sensors are supplied with common 5-volt reference and ground circuits from the DSM. The position sensor signal circuits are supplied 5 volts through resistors then monitored within the DSM. The signal voltages monitored by the DSM range from 0.39-4.58 volts and are determined by the wiper locations on the resistors within the position sensors. The position sensor signal circuit voltage levels are used by the DSM to determine the seat position when storing or recalling memory seat position settings.

The memory switch assembly provides inputs to the DSM. Battery voltage is supplied to the memory switch assembly from the seat module. When a memory 1, 2, or EXIT switch is pressed, the switch contacts close the appropriate switch signal circuit to the battery voltage supply circuit within the memory switch assembly. When the seat module receives active switch signals from the memory switch assembly, the appropriate seat adjuster motors are operated, as necessary, until the position sensor signal voltages match the stored values.

Memory seat recall operation, while the ignition is ON, is allowed only with the transmission selector lever in the PARK position. The transmission selector lever position data is provided to the DSM by a message through the class 2 Serial Data circuit.