Circuit Description

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

The driver door switch (DDS) and passenger door switch (PDS) receive mirror position signals from the mirror horizontal and vertical position sensors. These signals are used by the door switches for memory recall functions of the driver and passenger mirrors. The door switches command the mirror memory settings based upon the voltage level received back from the position sensors. Each door switch provides a 5-volt supply, a signal, and ground circuit for each of the position sensors. The horizontal and vertical position sensors are variable resistors that the door switches monitor voltage levels across. When a memory setting is recalled, the door switches command the mirror motors in the appropriate directions until the stored position sensor voltage levels are achieved. The DDS and PDS monitor the signal circuits to determine if the voltage level is out of range. For more detailed information concerning power mirror operation, refer to Outside Mirror Description and Operation (Heated Mirrors) or Outside Mirror Description and Operation (Power Mirrors) .