Geely EC715 2009, Workshop Manual

Page: 1762 / 2181

11.7.3 System Working Principle
11.7.3.1 System Working Principle
Wake up and Sleep
When the engine is turned off, if the sleeping conditions are
met (engine shut down, no warning lamp alarm, no buzzer
alarm, main control Sleep CAN message four conditions are
simultaneously satisfied), instrument panel will enter a power
saving sleep mode, all the instrument functions and CAN bus
communication stops running. If the wake-up conditions are
met (CAN network communication, ignition switch signal,
reverse lamp switch one of the signals), the entire CAN bus will
return to normal operating mode.
Lighting
General Lighting Rules:
– Instrument panel has white translucent lighting, LCD has
white backlight.
– Lighting level is adjusted by an external PWM input signal,
after engine shut down lights brightness can still be
adjusted.
Lighting logic:
Ignition
Signal
Parking
Signal
Light
LCD Lighting
Instrument
Panel Lighting
Off VCC
On, Brightness
Adjustable
On, Brightness
Adjustable
Off GND
On, Brightness Is
Not Adjustable
Off
On VCC
On, Brightness
Adjustable
On, Brightness
Is Not
Adjustable
On GND
On, Brightness Is
Not Adjustable
Off
Note
When the instrument cluster enters into the sleep mode,
backlight will be off. If the parking lights are turned on,
instrument cluster will be awakened, LCD and
instrument cluster lighting will be enabled. In this case,
when the CAN network is in the sleep mode, the meter
only shows trip meter, odometer, ODO icon, fuel icons,
the water temperature icons, mode can not be switched,
non CAN based messages on the LED and sound alarm;
When the CAN network is awake, the instrument cluster
will start all defined functions.
Warning Lamps Control
– Two warning lamps in the instrument cluster are powered
by battery, they are:
• Headlamp High Beam Indicator
• Daytime Running Light (If equipped)
Note
Other warning lamps in the instrument cluster are
powered by the ignition power supply.
– The following warning lamps are directly controlled by the
hardware:
•
Headlamp High Beam Indicator
• Daytime Running Light (If equipped)
• Battery Charging Indicator
• Tire Pressure Warning Lamp
• Brake Malfunction / Low Brake Fluid Warning Lamp
•
Park Brake Indicator
• Tire Pressure Management System Indicator
• Engine Oil Pressure Warning Lamp
Note
The rest warning lamps are controlled by signals
from the CAN bus.
Buzzer
Buzzer Function
In the following five cases, the buzzer will sound, prompt the
driver the corresponding warning message. Buzzer tones
frequency parameter is stored in EEPROM.
11-278 Instrument / Driver Information System Body Electric
EC718/EC718RV EC715/EC715RV 10/2009