Electrochromic Mirror (DD8)

CIRCUIT OPERATION
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 set at MIN, battery voltage is applied to the mirror's solid state circuits through Fuse B9 and circuit 439. This voltage is used as a power supply and also sets the mirror's sensitivity to a low level. The MIN position is used primarily for city driving and sets the mirror to a low sensitivity level. If the mirror switch is placed in the MAX position, the mirror is set at a high sensitivity level. This causes the mirror to darken more at a lower glare level.

When the gear selector is placed in reverse, battery voltage is applied to the mirrors reset input through the Transaxle Range Switch and circuit 24. This causes the mirror 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. Verify power, ground, reset input and that the headlight and ambient sensors are clean before replacing the assembly.