Position Sensors

The position sensors are used by the MMM in order to perform the following functions:
^ Store the motor positions in the memory
^ Return the motors to the stored memory positions

The MMM provides a 5 V reference voltage through CKT 674 (YEL). The MMM provides reference ground through CKT 675 (LT GRN) to each mirror position sensor. These sensors are potentiometers that are mounted to each motor's transmission cable. When the cable rotates, the resistance of the potentiometer varies. The feedback voltage is monitored by the MMM in order to determine the motor position. The sensor feedback voltages vary from 0.25-4.75 V. 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 of the position sensor feedback voltages equal the feedback voltages stored in the memory. For the easy exit functions, only the seat position sensor feedback voltages are recorded and only the seat motors run.