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Home >> BMW >> 2013 >> 335i 2D Convertible, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 1058 (General Electrical System - Service Information (E88)) >> General Electrical System >> Interior mirror with digital compass : E70, E71, E82, E83, E88, E90, E91, E92, E93 >> Brightness control of display

Brightness control of display

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 135i, and 2010 BMW 128i. However, it is still accessible from the selected car via links, so may be relevant.
  1. 2 photodiodes in the electrochromic interior mirror record the surrounding brightness (1 photodiode for the surrounding brightness coming from the front, 1 photodiode for the surrounding brightness coming from the rear).

The photodiodes deliver the signals for the display brightness control.

The brightness of the display is adjusted by the interior mirror control electronics to suit the surrounding brightness.

A darkened interior mirror will become lighter while the soft top or the retractable hardtop is opening and closing.

The overhead control panel (FZD) transmits the signal (roof open or closed) to the control electronics for the interior mirror. The signal is transmitted on the wire that is also used for transmitting the signal for driving in reverse.

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