Lifan 620. Manual - part 50

IV. Trouble Symptom

 

Table 4-3

 

Table 4-3 

Symptom Cause 

Symptom Cause 

1 

Instrument cluster 

does not work 

1 Faulty fuse 

2 Faulty wiring and connector 

3 Faulty instrument cluster 

2 

Speedometer 

fault 

1 Faulty speed sensor 

2 Faulty wiring and connector 

3 Faulty instrument cluster 

3 

Tachometer fault 

1 Faulty engine or ECM 

2 Faulty wiring and connector 

3 Faulty instrument cluster 

4 Fuel gauge 

fault 

1 Faulty fuel level sensor 

2 Faulty wiring and connector 

3 Faulty instrument cluster 

5  

fault 

7  

①

 Check 

②

the resistance between connector terminal A9 and the body, normally less than 1Ω. If it 

is in a normal condition, replace the instrument cluster, if not, repair or change the wire and 
connector. 
(2) Check the circuit as shown in Fig. 4-20. 
2. Speedometer fault 
(1) Check steps 
1) Check the power input end of speed sensor. 
Ignition switch ON-position, check the voltage between 1-T2 and the body, normally around 10～
14V. 

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If it is in a normal condition, go to step 2), if not, repair or change the fuse, wire and connector. 
2) Check the ground end of speed sensor as shown in Fig. 4-20. 
Check the resistance between 2-T2 and the body, normally less than 1Ω. If it is in a normal 
condition, go to step 3), if not, repair or change the wire and connector. 

 

Fig. 4-21 

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3. Tachometer fault 
(1) Check steps 
1) Check rotation speed signal output of engine ECM. 
Check the voltage between connector terminals A22 and A9 of instrument cluster when engine 
runs, normally, pulsed voltage peaking around 5V generated. 
If it is in a normal condition, replace the instrument cluster, if not, repair or change the wire, 
connector or electronic injection system. 
2) Check the circuit as shown in Fig. 4-22. 
 

①

 Measure the 

②

impedance between A23 and 3-F11, normally less than 1Ω. 

 Measure the impedance between 

③

harness terminal A9 and the body, normally less than 1Ω. 

 Measure the impedance between 

④

instrument cluster terminal A23 and the body, normally more 

than 100KΩ. 
⑤

 Measure the impedance between instrument cluster terminal A9 and the body, normally more 

than 100KΩ. 
If it is in a normal condition, replace the instrument cluster, if not, repair or change the wire and 
connector. 
 

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(2) Check the circuit as shown in Fig. 4-23. 

 

②

③

 

Fig. 4-24 

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