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 dimming/brightening 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 dimming/brightening timing, the sensitivity depends on settings. The settings can be changed with CONSULT. Refer to "HEADLAMP : CONSULT Function (BCM HEAD LAMP)" Head Lamp.
Auto Light Adjustment Timing Table
When the ignition switch is ON, the illumination of combination meter and display switches dimming/brightening in the following condition.





BCM switches the illumination of combination meter and display to dimming when outside brightening obtained from the optical sensor signal is 1250 lx or less for 3 seconds or more. And BCM switches the illumination of combination meter and display to brightening when outside brightening from the optical sensor signal is 2500 lx or more for 5 seconds or more.