Power Mirrors: Notes

Power outside rearview mirror system consists of following components:

• Driver Door Switch Assembly (DDSA).
• Driver Door Module (DDM).
• Passenger Door Module (PDM).
• Driver outside mirror.
• Passenger outside mirror.
• Class 2 serial data link.
• DRV MDL fuse (10-amp) door module logic and internal driver operation.
• PASS MDL fuse (10-amp) door module logic and internal driver operation.

To control outside rear view mirror adjustments, 2 switches are contained within Driver Door Switch Assembly (DDSA). DDSA contains a built in mirror select switch, and built in mirror position switch. DDSA is wired to and receives direct signal inputs from the memory function switch. For power mirror operations, DDSA reports switch activity to the Driver Door Module (DDM) and Passenger Door Module (PDM).

Mirror select switch is used to select which mirror, left or right, is to be moved.

Mirror position switch is used to move selected mirror to desired position. There are 4 contacts located in the switch, one in each corner. The contacts are designated as left-up, left-down, right-up, and right-down. When switch is activated in a direct up, down, left, or right direction, the switch hits 2 of the contacts. DDSA recognizes the 2 contact signal as a one direction signal in direction common to the 2 signals. Depending on which mirror has been selected for adjustment, DDSA then sends this information, over the class 2 serial data line, to DDM or PDM. DDM or PDM then moves appropriate mirror to requested position.