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Training Center of After-Sales Department Chery International
12. Instrument cluster
174
2. Function description
Instrument cluster backlight control
With the parking lamp on, the PWM signal input by backlight switch will be controlled by the
micro processer to realize the backlight control. When the backlight is regulated to a certain
point, PWM signal of backlight switch will have a fluctuation of 5%, and the instrument
cluster needs damping.
PWM input signal:
Frequency: 80
±
10%Hz
Duty ratio: 10%
±
4%~90%
±
5%
Pin 12 backlight is a PWM signal input to the instrument by the control switch.
When the instrument receives this backlight signal, it will regulate the brightness of
backlight of dial of the instrument cluster as the case may be, and it is also necessary to
regulate LCD backlight brightness to keep consistent with car backlight color and brightness.
When the backlight is off, the brightness of instrument cluster LCD is 80%.
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