Operation CHARM: Car repair manuals for everyone.
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Memory Mirrors

Operation of the memory mirrors is similar to that of the memory seats. Each mirror contains two motors. One motor moves the mirror up and down, and the other moves it left and right. The direction the motors turn depends on the supply voltage polarity sent to the motors. Mirror selection (LH or RH) and movement (up/down or left/right) is controlled by operating the outside mirror switch. When the switch is operated, battery voltage or ground is applied to the module's mirror select/position inputs. The module will supply battery voltage and ground to the mirror motors based on the input it sees, moving the mirror to the commanded position.

Mirror motor position sensors are used to "remember" the mirror positions. These sensors are potentiometers contained in the mirror's drive unit. As the mirror motors turn, the potentiometer resistance is varied. The mirror position is determined by the voltage level sent to the memory seat/mirror control module. When the set memory button is pushed and either the Driver- 1 or Driver-2 button is pressed, the mirror position sensor voltage levels are stored to "remember" the mirror positions.