Lifan 620. Manual — part 16

37. DTC: P1651, Malfunction Indicator Light Control Circuit Trouble (see Table 1-50)

Table 1-50

S/N Operation Test

Results

Actions

1

Connect the diagnostic instrument and adapter, and turn the

ignition switch to ON.

Next

step

Yes Next

step

2

Carry out action tests for the MIL of the engine with a

3

4

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Section IV

Steps for Trouble Diagnosis Based on Engine Symptom

Before the steps for trouble diagnosis based on engine symptom, carry out the following primary
checks at first:

66

I. LF481Q3 engine

1. If the engine fails to run or runs slowly at start, carry out the trouble diagnosis and removal as
per Table 1-51.

Table 1-51

S/N Operation Test

Results

Actions

Yes Next

step

1

Measure the voltage between the two terminals of the

battery with a multimeter. Is the voltage about

10-12.5V?

No

Repair or replace battery

2

3

4

5

6

7

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2. If the engine can not be successfully started, carry out the trouble diagnosis and removal as per
Table 1-52.

Table 1-52

S/N Operation Test

Results

Actions

Yes

Remove the trouble

1

Turn the ignition switch to ON. Check if there is

trouble information records with a diagnostic

instrument.

No Next

step

Yes 8

2

Take out the spark plug, and make the electrode of

3

4

5

6

7

8

9

Yes Next

step

11

Clean the fuel injector and check the fuel injector for

fuel injection.

No

Replace fuel injector

Yes Replace

fuel

12

Check if the fuel is wrong or contains water.

No 18

Yes Next

step

13

Check if the fuel pressure is lower than 300kPa.

No 17

Yes Next

step

14

Close the fuel gauge valve. Turn on the ignition switch

again and keep the fuel pump working for 3 seconds.

Check if fuel pressure can be produced.

No 16

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