Electrochromic Mirror (DD8)

The Electrochromic Mirror requires three electrical inputs for operation, a power input, a reset input and a ground. The mirror also uses the headlight and ambient photocell sensors, which are part of the mirror, as inputs to determine light conditions.

When the ignition is in RUN and the mirror switch is in the ON position, battery voltage is applied to the mirror's solid state circuits at terminal C1/3. This voltage is used as a power supply for the mirror's internal components.

When the logic circuit senses more light from the headlight sensor than the ambient sensor the Electrochromic drive circuit applies a small voltage to the mirror(so) to darken them. Approximately 1.15 volts is applied to the mirrors When a large amount of glare is present. The Electrochromic drive circuit reduces voltage to the mirrors to approximately 0.01 volts when the logic circuit senses the same light level from both sensors. The mirrors return to the high reflectance state.

Terminal C1/1 the reset input is used to reset the mirror to a daytime clear state when voltage is applied to it. When the car is placed in reverse battery voltage from Fuse A3 is applied to the mirror(s) reset input terminal C1/C through the Transaxle Range Switch. This causes the mirror(s) to gradually change to a clear state (high reflectivity). The driver's rear view is now clear.

The Electrochromic Mirror cannot be serviced and must be replaced as an assembly.