Driver and Passenger Outside Mirror Operation

In order to control outside rear view mirror adjustments, three switches are contained within the Driver Door Switch Assembly (DDSA). The DDSA contains a built in mirror select switch, a built in mirror position switch and, for export vehicles, a built in express folding mirror switch. The DDSA reports the switch activity to the Driver Door Module (DDM). The mirror select switch is used to select which mirror, left or right, is to be moved.

The express folding mirror switch is used to move the mirrors to the fully folded position, or the fully extended position.

The mirror position switch is used to move the mirror that has been selected for adjustment to the desired position. Four mirror switch contacts are located in the corners of the mirror position switch. The contacts are left-up, left-down, right-up, and right-down. When the mirror position switch is activated in a direct up, down, left, or right direction, the switch hits two of the contacts. The DDSA recognizes the two contact input as a one direction input in the direction common to the two inputs and sends this data on to the DDM. Depending on which mirror has been selected for adjustment, the DDM either moves the driver door mirror to the requested position, or sends a power door serial data message to the Passenger Door Module (PDM) indicating that the passenger door mirror needs to be moved. The DDM then moves the passenger door mirror to the requested position. Each mirror has two reversible motors for position adjustment, and one reversible motor for power folding functions. The door modules control the reversible motors by supplying Battery Positive Voltage (B+) and ground to these motors.