Principles of Operation

PRINCIPLES OF OPERATION

The exterior mirrors are electrically controlled by the exterior mirror control switch for both vertical and horizontal movement. The exterior mirror control switch is hardwired to the driver door module (DDM). When the LH or the RH exterior mirror is selected, adjustment is carried out by moving the control switch to the desired position.

Auto-Dimming Exterior and Interior Mirrors
This feature reduces the glare caused by headlamps reflecting in the interior rear view mirror or LH exterior mirror. There are 2 integral sensors to control the dimming function. The auto-dimming interior rear view mirror defaults to the normal setting when the transmission is placed in REVERSE. The interior rear view mirror receives a reverse input from the back-up lamps, then supplies a power signal to the interior mirror, causing the mirrors to cancel any dimming function. When the transmission is moved out of REVERSE, the auto-dimming mirrors return to normal operation and resume any interrupted dimming function.

Memory (if equipped)
The memory mirror function recalls the preferred positioning of the exterior mirrors. Memory is activated by the door-mounted switches, the remote keyless entry (RKE) transmitter or the RKE keypad. The DDM transmits a restore position signal to the driver seat module (DSM). The DSM constantly tracks the exterior mirror position using the potentiometers in the exterior mirror assembly. The positions remain in memory as long as the module retains power. When a memory position is recalled by the operator, the DSM powers the exterior mirror motors simultaneously and monitors the potentiometer circuits. When the stored memory position is reached, the DSM removes the voltage from the motors. If the exterior mirror control switch is operated during a memory recall, the modules stop the recall and respond to the exterior mirror control switch command.