Circuit/System Description

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

The Driver Door Switch (DDS) or Passenger Door Switch (PDS) controls the mirror horizontal and vertical motors through the use of bi-directional motor controls. When the mirror is commanded up, voltage is supplied to the mirror vertical motor through the Left/Right Mirror Motor - Up/Right Control circuit and ground is supplied through the Left/Right Mirror Motor Down Control circuit. When the mirror is commanded down, voltage is supplied to the mirror vertical motor through the Left/Right Mirror Motor Down Control circuit and ground is supplied through the Left/Right Mirror Motor - Up/Right Control circuit.

Horizontal controls operate in the same manner with the Left/Right Mirror Motor - Up/Right Control circuit supplying voltage and the Left/Right Mirror Motor Left Control circuit supply a ground to the mirror horizontal motor when the mirror is commanded right. When the mirror is commanded left, voltage is supplied to the mirror horizontal motor through the Left/Right Mirror Motor Left Control circuit and ground is supplied through the Left/Right Mirror Motor - Up/Right Control circuit.

The Driver Door Switch (DDS) and Passenger Door Switch (PDS) determine the position of the outside rearview mirrors based on inputs from two mirror position sensors, one for vertical position, the other for horizontal position. 5 volts is applied to each sensor through a shared 5-volt reference circuit and a shared low reference circuit supplies ground. Each sensor has an individual signal circuit which provides position voltage to the DDS/PDS.