Power Mirror System

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Power Mirror System Components

The power mirror system consists of the following components:

Driver Door Switch (DDS)-An electronic control module with integrated switches and requires programming when replaced
Passenger Door Switch (PDS)-An electronic control module with integrated switches, requires programming when replaced
Power Mirror Direction Switch-Integrated into DDS and is a 4 position momentary switch that provides a signal input to the DDS for up, down, left/extend and right/retract with a mirror switch activation
Mirror Select Switch-Integrated into DDS and is a 3 position switch that allows the operator to select the left or right mirror and also a neutral/fold position
Left Outside Power Mirror-Contains both the vertical and horizontal mirror motors
Right Outside Power Mirror-Contains both the vertical and horizontal mirror motors
Body Control Module-An electronic control module that requires programming when replaced, serves as the power mode master and is the main message handler
Memory Switch, if equipped with memory mirrors-Supplied power by the DDS and provides a voltage signal to the DDS upon a switch activation
Horizontal and Vertical Position Sensors, if equipped with memory mirrors-Supplied a 5-volt and low reference by the DDS/PDS and provide a variable voltage signal to the DDS/PDS that is proportional to mirror position
Powertrain Control Module (PCM), if equipped with memory mirrors-An electronic control module that requires programming when replaced and provides the message indicating transmission gear selection
Driver Information Center (DIC), if equipped with memory mirrors-Part of the instrument cluster which is a an electronic control module that requires programming when replaced and is used to personalize the memory recall functions
Fold Motor, in each of the outside mirrors, if equipped with power fold mirrors-Provides extend and retract movements of the mirror and is serviced as a complete mirror assembly

Each of the outside power mirrors contains 2 reversible motors to provide horizontal and vertical movement of the mirror glass. The vertical motor operates the up and down directions and the horizontal motor operates the left and right directions. If equipped with power folding mirrors, each outside power mirror will contain a reversible fold motor to operate the extend and retract functions. Each of the mirror motors are circuit breaker protected.

Power Mirror System Controls

The power mirror switch incorporates a 3-position mirror select switch and a 4-position mirror direction switch. The mirror select switch allows the operator to select the mirror to be moved by selecting the L position for the left power mirror, selecting the R position for the right power mirror or the center which is the neutral/fold position. The mirror direction switch is a 4-position switch that allows the operator to move the selected mirror up, down, left or right. The mirror direction switch also functions as the folding mirror switch. When the selector switch is in the neutral/fold position, activate the mirror direction switch to the left to extend the mirrors and right to retract the mirrors.

Power Mirror System Operation

The power mirror switch is integrated into the DDS. The left and right mirror positions of the select switch and 4 positions of the direction switch, when active, will provide a signal to the DDS. If the selector switch is placed in the L position and the up switch is depressed, 2 signals will be supplied to the DDS. The DDS upon receipt of these signals will provide battery voltage to the mirror motor left/up control circuit and ground to the mirror motor down control circuit and the mirror will move up. The remainder of the driver mirror functions operate in the same manner as described above except the DDS will supply battery voltage and ground to the appropriate control circuits for the direction selected. If the passenger mirror is selected and a direction switch is activated, the DDS sends a LAN message to the PDS indicating that the passenger mirror was selected and the direction to be commanded. The PDS will then supply battery voltage and ground to the appropriate control circuits for the direction selected.