Lifan 620. Manual — part 21

Table 1-64 (Continued)

S/N Operation Test

Results

Actions

Yes Next

step

11

Check if the fuel pressure is lower than 250kPa.

No 15

Yes Next

step

12

Close the fuel gauge valve. Turn on the ignition switch

again and keep the fuel pump working for 3 seconds.

13

14

15

16

17

18

85

15. A/C system trouble

Table 1-65

S/N Operation Test

Results

Actions

Yes Next

step

1

Check if the refrigerant of the A/C system is enough.

Check the A/C belt, clutch, pressure switch for normal

operation.

No

Remove the trouble

Yes

Remove the trouble

2

Run the engine at an idle speed. Turn on the A/C switch.

3

4

5

1

2

No

Repair or replace

Yes 5

3

Take out the connector of each ignition coil in sequence.

Check if no decrease of the rotation speed of the engine

is produced at any moment for the cylinder.

No Next

step

Yes Next

step

4

Check if there is running sound for each fuel injector at

idle speed.

No

Check fuel injector and

relevant circuits

86

Table 1-66 (Continued)

S/N Operation Test

Results

Actions

Yes Next

step

5

Remove the ignition metal wire from the spark plug. Install

the wire to a normal spark plug. Place the bottom end of

the spark plug towards the gound, and then turn to the

engine. Check if the spark is normal.

No

Check ignition coil, giant

transistor, and their

circuits

No Next

step

6

Remove the spark plug. Check the place for dirts.

7

8

9

10

11

Check the intake air sensor signal with a diagnostic

instrument. (2.0-6.0gm/sec, at idle speed,

7.0-20.0gm/sec, at 2500rpm)

No

Check the connector of

the air intake temperature

sensor circuit for rust or

looseness.

87

II. TRITEC 1.6 engine

1. Fail to run or run slowly at start
Common trouble location：

1. Battery; 2. Start motor; 3. Harness or ignition switch; 4. Mechanical paof the engine.

Diagnosis Flow

Table 1-67

S/N Operation Test

Results

Actions

1

2

3

4

5

88