Power Mirrors - Operation

OPERATION

POWER OPERATED OUTSIDE REAR VIEW MIRRORS





The power operated outside rear view mirrors are connected to battery current at all times. Each mirror head contains two electric motors, two drive mechanisms, an electric heating element and the mirror glass. First, a mirror selector switch button (2) is depressed in the driver door power switch module (1) to determine whether the mirror adjuster switch (3) will have control over the right or left mirror. If the vehicle is equipped with the high current door power switch module configuration, hard wired ground and battery current outputs to each power mirror motor determine whether the horizontal or the vertical motor will be operated and the polarity of those outputs control the direction in which the motor will move the drive unit and mirror glass.

Power mirror and mirror switch functionality is the same with the low current configuration; however, the driver door power switch module sends power mirror switch status messages over the Local Interface Network (LIN) data bus to the driver front door control module. The driver front door control module then controls the high current outputs to the driver door mirror motors or sends electronic request messages over the Controller Area Network (CAN) Interior High Speed (IHS) data bus to the passenger front door control module to control high current outputs to the passenger door mirror motors.

The power mirror switch is diagnosed using a scan tool, A L L Diagnostic Trouble Codes ( DTC ) for the appropriate information.

AUTOMATIC DIMMING INSIDE REAR VIEW MIRROR SYSTEM

The ElectroChromic Mirror Module (ECMM) of the automatic dimming inside rear view mirror system receives battery current on a fused ignition output (run) circuit from a fuse in the Junction Block (JB) (also known as the interior Power Distribution Center/PDC). The ECCM has a path to ground at all times through a take out and eyelet terminal of the body wire harness that is secured to the body sheet metal. These connections allow the automatic dimming inside rear view mirror system to operate. When the automatic dimming mirror system is on, a green power indicator within the mirror housing is illuminated by an integral Light-Emitting Diode (LED) unit.