11.7.3 System work principle 

11.7.3.1 System operating principle 

Lightening: 

Lighting color: 

Function Day  Night 

Pointer 

Red(632nm, Lighted) 

Red(632nm, Lighted) 

Plate dial/number white 

Color/white 

White/white 

Back through lighting 

White 

White 

Alarm light 

Green, red, blue, yellow 

LCD-negative polarity, white 

on black. 

White 

Lighting logic: 

Ignition signal 

Position lamp signal 

LCD, pointer and dial plate 

illumination. 

Close: Close  Close 

Open: Close  Open 

Close: Open  Close 

Open: Open 

Open (backlight darken 1 

level) 

Warning lamp control 

The following warning lamp is directly controlled by the hardware: 

High-beam and lower-beam lamp indicator 

– Charging 

warning 

lamp 

– Tire-pressure 

warning lamp 

– Parking 

brake 

indicator 

– 

Indicator lamp of tire pressure management system fault 

– 

Oil pressure warning lamp 

Buzzer 

Buzzer function 

In the following five cases, the buzzer will beep to remind the driver of corresponding warning 
information. The tone frequency parameter of the buzzer is stored in EEPROM. 

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Function Triggering 

conditions 

Alarm against 

Unremoved Ignition 

Key 

When the ignition switch is under the state of ACC or OFF, the key is not 
pulled out of, and the left front door is opened, 

Unsecured warning of 

safety belt 

Driver's safety belt pill reminder signal must include visual signal and 
audible signal. 

If the driver does not wear the safety belt, the ignition switch is in 
position "ON", the above two signals are activated at the same time, 
wherein the audible signal lasts for 4 s and the visible signal persists in 
activating state until the safety belt is worn. 

If the driver does not wear a safety belt, the audible signal is activated for 
30s consecutively when the forward running speed of the vehicle exceeds 
25 Km/h; if the safety belt is worn within 30s, the visible signal is closed; 
and if the safety belt is not worn after 30s, the audible signal is 
automatically closed. 

After activated, the audible signal is still activated if the speed is lower 
than 25 Km/h until the safety belt is worn or within consecutive 30 s. 

When the next speed exceeds 25Km/h, the audible signal is not be 
activated secondarily regardless of whether the driver wears the safety 
belt. 

When the ignition switch is in the position "ON", a visual signal will be 
under activation state continually until the safety belt of the driver is 
worn. 

Co-driver safety belt 

unsecured 

The signal of the front row of passenger safety belt reminding device is 
in the form of visual signal and audible signal; meanwhile, the front row 
of passenger shall have the detection function of the active condition of 
the seat; if the front row of passenger seat is not ridden by the passenger, 
the front row of passenger seat monitor sensor does not send out the use 
signal at this time, and the safety belt reminding device is in close state 
automatically. 

If the passenger sits on the front row of passenger seat, the ignition 
switch is in the position "ON"; if the passenger does not wear the safety 
belt, the audible signal lasts for 10s; if the safety belt is worn within 10s, 
the audible signal is closed; and the audible signal is automatically closed 
after 10s. 

Alarm against 

travelling with door 

unlocked. 

Any one of four doors and two cover is not closed and the speed is higher 
than 10Km/h, the buzzer beeps three times to remind the driver. 

Overspeed Alarm 

When the combination instrument speedometer is higher than 120Km/h 
(allowable error of -1 Km/h), the buzzer beeps; and when the vehicle 
speed is lower than 115Km/h (allowable error of +1 Km/h), the buzzer 
stops beeping. 

Parking motor 

warning 

The combination instrument prompts according to the distance from the 
obstacle to the bumper and position information provided by the parking 

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radar head unit. 

The distance between the obstacle and the 
vehicle 

Sound frequency 

800mm-1400mm  

2Hz 

300mm-800 mm   

4Hz 

0mm-300mm  

Longly sounding 

Light does not close 

the warning. 

When the ignition switch is under the state of ACC or OFF, the position 
lamp turns on, and the left front door is opened, 

Buzzer priority 

When the alarm functions of the multiple buzzers exists at the same time, the high-priority alarm 
will be activated preferentially; and if a higher-priority alarm function is generated when the 
lower-priority alarm function is performed, the lower-priority alarm function will be activated 
again after the higher-priority alarm function is completed. The buzzer warning function priority is 
as follows: 

Alarm against travelling with door unlocked＞alarm against unfastened seat belts (main and 
auxiliary)>prompt of unremoved ignition key>prompt of forgeteting to turn off the clearance 
lamp. 

Seat belt alarm 

At any time after ignition, the corresponding alarm lamp turns off unless the safety belt of the 
driver or the co-pilot is worn. Self-check 

After the ignition switch is switched on, 2 LED warning lamps turns on under the software control 
to ensure the normal operation of the LED. These warning lamps are as follows: 

– 

Coolant high temperature alarm lamp: 

LED turns on for 3 minutes for self-check after the ignition switch is switched on. 

– 

Low fuel warning lamp: 

LED turns on for 3 seconds for self-check after the ignition switch is switched on. 

When the engine speed is higher than 300rpm, self-inspection will be broken. 

Scale 

After flameout, the pointers of all scales return to the zero position of the dial plate. 

Speedometer 

Speedometer 

Special stepping motor 

Deflection angle: 

240/degree 

Input signal to speedometer. 

The vehicle speed signal comes from the 

vehicle speed sensor. 

Corresponding output pulses per revolution of 

4 

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sensor 

The highest level output 

Min.high battery Vcc-0.5V 

The lowest level output 

Max. low level 0.5V 

Duty ratio 

50±12% 

Max.drive current 

25mA 

The speedometer acquires the speed signal via the signal sent by the vehicle speed sensor. 

Engine speed indicator 

Revolution meter input signal: the revolution speed signal is from a square-wave pulse signal 
given by the ECM. 

The corresponding value of the revolution speed and the frequency: 

Revolution speed r/min 

Frequency Hz 

1000 33.3 

2000 66.7 

3000 100 

4000 133.3 

5000 166.7 

6000 200 

7000 233.3 

Fuel gauge 

Fuel gauge input signal: it is from thick-film resistor sensor. One end is connected with the sensor 
ground. 

The fuel level sensor resistance parameters are recommended as follows: 

Capacity: Capacity Resistance 

Full 60L 

40±4Ω 

3/4 45L 

96.5±5Ω 

1/2 30L 

150±5Ω 

1/4 15L 

205±6Ω 

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