System Description

AUTO LIGHT ADJUSTMENT SYSTEM : System Description


OUTLINE
Auto light adjustment system is controlled by each function of BCM, combination meter and AV control unit

Control by BCM
- Auto light system
- Auto light adjustment system

AUTO LIGHT ADJUSTMENT SYSTEM

Description
- BCM supplies voltage to the optical sensor when the ignition switch is turned ON or ACC.
- Optical sensor converts outside brightness (lux) to voltage and transmits the optical sensor signal to BCM.
- BCM judges dims/brightness of combination meter and display according to brightness outside the vehicle, when ignition switch is ON.
- BCM transmits dimmer signal to combination meter via CAN communication, according to auto light adjustment conditions. Dimmer signal is also transmitted to AV control unit.

NOTE:
As to dims/brightness timing, the sensitivity depends on settings. The settings can be changed with CONSULT-III. Consult-III Function.

Auto Light Adjustment Timing Table
When the ignition switch is ON, the combination meter and display turns dims/brightness in the following condition.





BCM turns combination meter and display dims when outside brightness obtained from the optical sensor signal is 1250 lx or less for 3 seconds or more. And BCM turns combination meter and display brightness when outside brightness from the optical sensor signal is 2500 lx or more for 5 seconds or more.