Position Sensors

Position sensors are used by the Memory Mirror Module (MMM) to store motor positions in memory and return the motors to the stored memory positions. The MMM provides a 5 volt reference voltage through CKT 674 (YEL) and reference ground through CKT 675 (LT GRN) to each mirror position sensor. These sensors are potentiometers which are mounted to each motors transmission cable. When the cable rotates, the resistance of the potentiometer varies and the feedback voltage is monitored by the 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 MMM stores the motor positions by recording each position sensor feedback voltage. When a memory recall is commanded, the module moves 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.