System Description

SYSTEM

AUTO LIGHT ADJUSTMENT SYSTEM : System Description


OUTLINE

Auto light adjustment system is controlled by each function of BCM, combination meter and AV control unit
- 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. Head Lamp.
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.