Lifan 620. Manual - part 10

6. Intake manifold air temperarure sensor   

(see Table 1-8) 

 

Table 1-8 

Diagnostic Trouble Code (DTC) 

Trouble Location or Type 

P0112 

Intake air temperature circuit input low 

P0113 

Intake air temperature circuit input high 

S/N Operation Test 

Results 

Actions 

1 

Ignition switch in position ON. 

 

Next step 

2 

3 

4 

 

1 

2 

Yes Replace 

ECU 

3 

Measure the resistance between pin (1) and pin (3) 

with a multimeter. Does the resistance match with its 

temperature? (refer to relevant part of the manual) 

No Replace 

sensor 

Yes 

Repair or replace harness

4 

Connect an adapter between the ECU and the 

harness. Check for open or short circuit between pin 

J1-05, J1-43 of the ECU and the pin (1), (3) of the 

sensor with a multimeter. 

No 

ECU Replace ECU 

 

 

41

8. Fuel injector

   

(see Table 1-10) 

 

Table 1-10 

Diagnostic Trouble Code (DTC) 

Trouble Location or Type 

P0261 

Cyinder 1 fuel injector circuit low 

P0264 

Cyinder 2 fuel injector circuit low 

P0267 

Cyinder 3 fuel injector circuit low 

P0270 

Cyinder 4 fuel injector circuit low 

P0262 

Cyinder 1 fuel injector circuit high 

Yes Repeat 

8 

8 

Connect the solenoid fuel injector, keep neutral 

position, start the engine and keep idle speed. 

Disconnect the electromagnetic fuel injector in 

sequence. Check the engine for vibration when 

each connector is removed. 

No Replace 

ECU 

 

 

 

 

42

9. Canister control valve driving stage   

(see Table 1-11) 

 

Table 1-11 

Diagnostic Trouble Code (DTC) 

Trouble Location or Type 

P0444 

Evaporative emission control system, canister control valve 

circuit open 

P0445 

Evaporative emission control system, canister control valve 

circuit short 

S/N Operation 

Test 

Results 

Actions 

1 

2 

3 

4 

5 

6 

7 

 
 
 
 
 
 
 
 
 

 

43

10. Malfunction indicator light (MIL) driving stage   

(see Table 1-12) 

Table 1-12 

Diagnostic Trouble Code (DTC) 

Trouble Location or Type 

P0650 

MIL control circuit 

S/N Operation 

Test 

Results 

Actions 

1 

Ignition switch in position ON. 

 

Next step 

Yes Next 

step 

2 

Open the instrument panel, remove the MIL bulb, 

and measure the voltage of the jack. Is the voltage 

about 12V? 

No 

5 (check hot wire) 

3 

4 

5 

6 

7 

 

 

1 

2 

3 

motor with a multimeter. Is the resistance infinite? 

No 

Replace idle speed actuator 

Yes 

Replace idle speed actuator 

4 

Measure the resistance between pin (1) and pin (2), 

as well as between pin (3) and pin (4) of the stepper 

motor connected with the harness with a multimeter. 

Is the resistance about 12V? 

No Next 

step 

Yes 

Repair or replace harness 

5 

Connect an adapter between the ECU and the 

harness. Check for open or short circuit between pin 

J1-34, J1-33, J1-53, J1-54 of the ECU and the pin (1), 

(2), (3), (4) of the stepper motor with a multimeter. 

No Replace 

ECU 

44