Mirrors: Description and Operation

REAR VIEW MIRRORS

Principles of Operation

The exterior mirrors are controlled by the exterior mirror control switch. The exterior mirror control switch is hardwired to the driver seat module (DSM). The exterior mirror is selected by moving the control to the desired exterior mirror. The DSM receives the adjustment input command from the exterior mirror control switch and supplies power and ground to the appropriate exterior rear view mirror motor to adjust the exterior rear view mirror according to the inputs received from the exterior mirror control switch.

Heated Exterior Mirror
The heated exterior mirror feature will only function when the rear window defrost is operating. There is no separate control for heated exterior mirrors; they function anytime the rear window defrost is ON. The heated mirror power is supplied by the rear window defrost relay through a separate central junction box (CJB) fuse that isolates the heated mirrors from the rear window defrost in the event of a concern.

Memory Exterior Mirror
The memory exterior mirror feature allows the driver to program personalized mirror positions that can be recalled using the memory switches or remote transmitter. There are three memory settings possible. The power driver seat and pedal positions are also stored, and recalled with the memory exterior rear view mirrors positions.

The DSM constantly tracks mirror position. Each exterior mirror motor is equipped with a potentiometer, which the DSM uses to monitor the mirror position. This position remains in memory as long as the module retains power. When a position is stored in memory by the operator, the module will retain this position in memory for future recall. When a memory position is recalled by the operator, the DSM will power the exterior mirror motors simultaneously and monitor the potentiometer circuits. When the stored memory position is reached, the DSM will remove power from the motors. If the exterior mirror control switch is operated during a memory recall, the DSM will stop the memory recall and respond to the exterior mirror control switch command.