Circuit Description

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

The driver door module (DDM) and the passenger door module (PDM) each provide motor control output functions for their respective mirrors. These output controls allow the DDM and the PDM to command their respective power mirrors in horizontal and vertical positions. The mirror switch circuits in the driver door switch provide inputs to the DDM when the mirror switch is pressed UP, DOWN, LEFT or RIGHT. When the DDM detects an active mirror command from the mirror switch, the DDM will command the respective mirror motor in the appropriate direction. The DDM controls passenger mirror functions by sending mirror control messages to the PDM on the serial data line, and the PDM then commands the passenger mirror. Each door module commands their respective mirror motors by applying a ground or voltage to the control circuit, depending on the desired mirror position. If the DDM or PDM detects a short to ground or voltage condition in a mirror motor control circuit for greater than 2 seconds, a DTC is set.