Outside Mirror Description and Operation Heated Mirrors
Heated Outside Rearview Mirror
The driver door module (DDM) and front passenger door module (FPDM) control the activation of the heated mirrors. Upon receiving a serial data message indicating a request for rear window defogging, the DDM and FPDM will activate the mirror
heater output. The mirror heaters will remain active until a new message is received indicating rear window defogger is deactivated, either by driver input or by expiration of a calibrated timer.
Outside Mirror Description and Operation Power Mirrors
Power Mirror System
Power Mirror System Components
The power mirror system consists of the following components:
| • | Driver Door Module (DDM)--An electronic control module with integrated switches and requires programming when replaced |
| • | Front Passenger Door Module (FPDM)--An electronic control module with integrated switches and requires programming when replaced |
| • | Power Mirror Direction Switch--Integrated into DDM and is a 4 position momentary switch that provides a signal input to the DDM for up, down, left and right with mirror switch activation |
| • | Folding Mirror Switch--Integrated into DDM and is a 3 position switch that allows the operator to extend or retract the mirrors |
| • | Mirror Select Switch--Integrated into DDM and is a 3 position switch that allows the operator to select the left or right mirror and also a neutral 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 DDM and provides a voltage signal to the DDM upon a switch activation |
| • | Horizontal and Vertical Position Sensors--Supplied a 5-volt and low reference by the DDM/FPDM and provides a variable voltage signal to the DDM/FPDM that is proportional to mirror position |
| • | Engine Control Module (ECM), 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)--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 2-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.
Power Mirror System Operation
The power mirror switch is integrated into the DDM. 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 DDM. The DDM upon receipt of these signals will provide battery
voltage to the mirror motor up/right 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 DDM 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 DDM sends a serial data message to the FPDM indicating that the passenger mirror was selected and
the direction to be commanded. The FPDM will then supply battery voltage and ground to the appropriate control circuits for the direction selected.
Memory Mirror System
Memory Mirror System Controls
The DDM and FPDM are capable of storing mirror positions and controlling the mirrors to these positions to the preferred settings of 2 different drivers. Each driver will be able to personalize the memory system by positioning the mirrors and seats to
their preferred settings. Then press and hold the memory 1 or memory 2 button until an audible chime is heard and the current mirror positions will be stored into memory of the DDM and FPDM. Seat position will be stored in the memory seat module (MSM). Once
the mirror and seat positions have been stored into memory, a momentary memory 1 or memory 2 switch activation will supply the DDM a battery voltage signal. The DDM, upon receipt of the memory switch signal, with the transmission in park or neutral, will then
drive the driver mirror to the corresponding stored memory position. The DDM will also send a serial data message to the FPDM and DSM indicating that a memory switch activation occurred. The FPDM will then drive the passenger mirror and the MSM will drive the
driver seat to the corresponding stored memory position. The memory system can also be controlled by any of the following if programmed using the DIC to enable/disable the features:
| • | Auto exit/entry seat positioning |
| • | Mirror and seat position recall on a keyless entry unlock activation |
| • | Mirror and seat position recall on ignition key insertion |
For further information on programming and configuration, refer to the vehicle owners manual.
Memory Mirror System Operation
Mirror position is determined by both horizontal and vertical position sensors in each of the power mirrors. The DDM and FPDM supplies a reference voltage and a low reference to these sensors and determines mirror position through the horizontal and vertical
position signal circuits.
Folding Mirror System
Folding Mirror System Operation
Upon receipt of the required switch input, the DDM will supply battery voltage and ground to the folding mirror motor control circuits to perform the requested extend or retract function. The DDM will also send a serial data message to the FPDM indicating
the requested function. The FPDM will supply battery voltage and ground to the folding mirror motor control circuits to perform the requested extend or retract function.
