Principles of Operation

Rear View Mirrors - Exterior

Principles of Operation

The movement of the LH and RH exterior mirror glass is controlled by the exterior mirror control switch and the LH and RH exterior mirror motors. Adjusting the exterior mirror switch to the LH or RH position determines which exterior mirror motor will be controlled. The exterior mirror control switch logic is the selected movement request from the exterior mirror control switch. When the exterior mirror control switch is adjusted to the left, right, up or down position, the exterior mirror control switch will supply voltage and ground to the selected exterior mirror motor to move the exterior mirror glass to the desired position.

Only vehicles equipped with memory exterior rear view mirrors are capable of setting DTCs.

The exterior mirrors use a jumper harness between the vehicle wire harness connector and the exterior mirror motor. The exterior mirror jumper harness is integral to the exterior mirror. If a concern with the exterior mirror jumper harness exists and cannot be repaired, a new exterior mirror must be installed.

Heated Exterior Mirrors

The rear window defrost switch controls the operation of the heated exterior mirror glass. The heated exterior mirror glass only operates when the rear window defrost system is ON. The heated exterior mirror glass power is supplied by the rear window defrost relay through a separate Battery Junction Box (BJB) fuse, which isolates the heated exterior mirror system from the rear window defrost system in the event of a concern.

Memory Exterior Mirrors

The memory mirror function recalls the preferred positioning of the exterior mirror motors when the transmission is in the PARK or NEUTRAL position and the door mounted switches or the Remote Keyless Entry (RKE) transmitter are activated.

When a mirror motor position is stored by the operator, the module will retain this position for future recall. The position of the mirror motors are stored within the Driver Seat Module (DSM) memory as long as the DSM retains power. Each exterior mirror motor is equipped with a potentiometer, which the DSM uses to monitor the position of the mirrors. 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 exterior mirror 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.

For information on the DSM and Memory Position Programming, refer to Seats.

Puddle Lamps

The exterior mirrors may be equipped with puddle lamps, which will illuminate when the interior lights are turned on by opening a door or by pressing the unlock button on the remote transmitter, if equipped.