Memory Mirrors (W/A45)

The memory mirrors are controlled by the Driver Door Switch Assembly (DDSA), the Driver Door Module (DDM), and the Passenger Front Door Module (PDM). The DDSA is used in decoding memory switch activations and the door modules are used to store mirror position information and move the mirrors.

When a mirror position is programmed into the personalization package, the door modules store the position information and assign it to the personalization code. During a memory recall, that personalization code is retrieved by the modules. The modules then check the current position of the mirrors and move them to the position matching the retrieved code.

Each mirror is equipped with two potentiometer type position sensors and circuits that provide constant information, in the form of feedback voltage to each door module indicating the position of the mirrors on their horizontal and vertical axis. The mirror position sensors are attached to each mirror motor's transmission cable. When the cable rotates, the resistance of the sensors vary and the feedback voltage is monitored by the appropriate door module to determine the mirrors position. The sensor feedback voltage varies from 0.25 volts to 4.75 volts. Each door module also supplies reference voltage through a 5 volt reference circuit, and ground through a mirror sensor low reference circuit to their respective mirror position sensors.

The driver door module receives feedback voltage from the LH mirror horizontal position sensor through the left mirror horizontal position sensor signal circuit and feedback voltage from the LH mirror vertical position sensor through the left mirror vertical position sensor signal circuit.

The passenger door module receives feedback voltage from the RH mirror horizontal position sensor through the right mirror horizontal position sensor signal circuit and feedback voltage from the RH mirror vertical position sensor through the right mirror vertical position sensor signal circuit.

When a memory Set command is received, each door module records the motor positions by storing the feedback voltage of their respective position sensors. When a memory Recall command is received, each door module moves the motors until the position sensor feedback voltages equal the feedback voltages stored in memory.

"For the description of RPO code(s) shown in this article or any of the images therein, refer to the RPO code list found at the Vehicle/Application And ID." RPO Codes