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