Lifan 620. Manual - part 5

Chapter I    Electronic Injection System 

 

Section I  Introduction  

 

I. Fundamentals 

 

 

 

 

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Section II    Principle of controlling and actuating components 

 
1. Intake pressure/temperature sensor   

(Fig. 1-1) 

 

Fig. 1-1 

 

Fig. 1-2 

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(6) Trouble diagnosis:

 The electronic devices of the intake air pressure sensor can diagnose 

such troubles as open/short circuit and the damage of senor. When the ECU detects that the 
signal output by the sensor is beyond its normal signal curve, the sensor will be in trouble. For 
example, when the intake air pressure is higher or lower than its limit, the ECU will confirm that the 
sensor is in trouble (The pressure lower than the limit at start will be excluded by the ECU.), then 
the engine MIL will be lighted and the operation under trouble mode will be applied. 

 
2. Throttle position sensor figure   

(Fig. 1-3) 

 

 

 

 

 

 

 

 

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(3) Connection of wiring diagram   

(Fig. 1-4) 

 

 

Coolant temperature sensor 

                                                           

Pin: 3 pins available, equivalent. 

a Electronic injection system water temperature signal pin, resistance at 20 : 2.45KΩ

℃

 

b Instrument water temperature pin, resistance at 80 , 0.05 KΩ

℃

 

c Signal ground 

Fig. 1-5 

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