Memory Mirrors

Vehicle may be equipped with "personalization package" containing memory seats and memory mirrors. Memory mirrors are controlled by Driver Door Switch Assembly (DDSA), Driver Door Module (DDM), and Passenger Door Module (PDM). DDSA is used in decoding memory switch activations and door modules are used to store mirror position information and move outside rearview mirrors. When a mirror position is programmed into personalization package, door modules store position information and assign it to personalization code. During a memory recall, that personalization code is received by modules. Modules then check current position of outside rearview mirrors and move them to correct position.

Each outside rearview mirror is equipped with 2 potentiometer type position sensors and circuits that provide constant information, in a form of feedback voltage, to each door module indicating position of outside rearview mirrors on their horizontal and vertical axis. Mirror position sensors are attached to each mirror motor's transmission cable. When cable rotates, resistance of sensors vary and feedback voltage is monitored by appropriate door module to determine motor position. Sensor feedback voltage varies from 0.25-4.75 volts. Each door module also supplies reference voltage through a 5-volt reference circuit, and ground through a memory seat/mirror sensor low reference circuit to their respective mirror position sensors. DDM receives feedback voltage from driver mirror horizontal position sensor through left mirror horizontal position sensor signal circuit and feedback voltage from left mirror vertical position sensor through left mirror vertical position sensor signal circuit. PDM receives feedback voltage from right mirror horizontal position sensor through right mirror horizontal position sensor signal circuit and feedback voltage from right mirror vertical position sensor through right mirror vertical position sensor signal circuit. When a memory set command is received, each door module records motor positions by storing feedback voltage of their respective position sensors. When a memory recall command is received, each door module moves motors until position sensor feedback voltages equal feedback voltages stored in memory.