The power outside mirror system consists of then following components:

The vehicle is equipped with power mirrors controlled by the driver door module (DDM) and the passenger door module (PDM) in the driver and passenger front doors. The control modules move the power mirrors in response to direction from the mirror control switches located on the driver door switch assembly (DDSA).

The DDSA, DDM and PDM communicate power mirror information via the power door serial data circuit. The processor in the DDSA detects the switch positions of the mirror selector and mirror direction switches. The DDSA then sends this data to the DDM via the power door serial data circuit. The DDM then either powers the driver door mirror motor circuits or sends data to the PDM. The PDM then powers the passenger door mirror motor circuits.

The vehicle may be equipped with the personalization package containing memory seats and memory mirrors. The memory mirrors are also controlled by the DDSA, DDM and PDM. The mirrors are equipped with potentiometer circuits that provide constant information to the PDM and DDM on the location of the mirrors on their horizontal and vertical axis. This information is in the form of feedback voltage received from internal potentiometers.

When a mirror location is programmed into the personalization package, the DDM and PDM store the location information and assign it to the personalization code. When that personalization code is received the modules check the current position of the mirrors and move them to the correct position. The modules move the mirrors until the feedback voltage from the mirrors match the voltage levels stored as correct for that personalization code.

If the vehicle is equipped with memory mirrors, the vehicle is equipped with the park aid mirror system as a personalization option. This is to assist in parallel parking situations. The park aid mirror option is turned ON and OFF through the driver information center. The feature must be turned ON for the current memory setting in order to operate.

If the option is turned ON for the current or last driver identified (by either using the key fob transmitter or by pressing the driver memory switch on the door), the passenger side exterior mirror functions as listed:

The tilt mirror function will operate even if the mirror was positioned by using the mirror position switches, as long as the function is turned ON for the last driver identified.

In this system the instrument panel cluster (IPC) sends a Class 2 message to the DDM indicating the Reverse position of the transmission selector. The DDM sends a power door serial data message to the PDM, which powers the vertical mirror motor to tilt the passenger mirror down.

When the IPC detects the transmission is no longer in Reverse, the IPC sends the message to the DDM. The DDM sends a message to the PDM and the PDM powers the circuits to return the mirror to the original position.

The automatic day/night feature of the driver outside rearview mirror is controlled by the inside rearview mirror. The inside rearview mirror supplies a signal and a low reference to the driver outside rearview mirror. The voltage on the signal circuit of the driver outside rearview mirror varies between 0.5 to 1.5 volts depending on light conditions present at the inside rearview mirror. At night, with the automatic day-night feature enabled, the driver outside rearview mirror will automatically darken with the inside rearview mirror to reduce the glare from the headlamps from behind. The voltage on the signal circuit of the driver outside rearview mirror will be near 1.5 volts. In the daytime, the mirrors are in a normal state. The voltage on the signal circuit of the driver outside rearview mirror may be less than or near 0.5 volts. Refer to Automatic Day-Night Mirror Description and Operation in Stationary Windows for further description and operation of the inside rearview mirror.

The mirrors heat during the defrost/defog cycles for the rear window. The heated mirrors are connected to the DDM and the PDM. When the standard body control module (BCM) receives the class 2 message from the instrument panel cluster (IPC) that the rear window defrost has been turned ON, it sends the message on to the DDM. When the DDM receives the class 2 message from the BCM commanding the heated mirrors ON, it supplies the voltage and ground to the heater element in the driver outside mirror and sends a power door serial data message to the PDM to command the passenger side mirror heater ON. The PDM supplies the voltage and ground to the heater element in the passenger outside mirror.