Position Sensors

Position sensors are used by the Memory Seat Module (MSM) and the Memory Mirror Module (MMM) to store motor positions in memory and return the motors to the stored memory positions. The MSM provides a 5 volt reference voltage through CKT 788 (GRY) and reference ground through CKT 782 (BLK) to each of the seat position sensors. The MMM provides a S volt reference voltage through CKT 934 (LT GRN/BLK) and reference ground through CKT 939 (RED/BLK) to each mirror position sensor. These sensors are potentiometers which are mounted to each motor's transmission cable. When the cable rotates, the resistance of the potentiometer varies and the feedback voltage is monitored by the MSM or MMM to determine the motor position. The sensor feedback voltages vary from 0.25 volts to 4.75 volts. When a Set Memory command is executed, the MSM and MMM store the motor positions by recording each position sensor feedback voltage. When a Memory Recall is commanded, the modules move the motors until all the position sensor feedback voltages equal the feedback voltages stored in memory. For the Easy Exit functions, only seat position sensor feedback voltages are recorded and only the seat motors run.