Chery A series. Manual - part 44

 

Yes 

Replace the fuel 

12 

Verify that the fuel is deteriorated or 
contaminated by water. 

No 

Proceed to Step 18. 

Yes 

Proceed to next step. 

13 

Verify that the fuel pressure is lower than 
350kPa. 

No 

Proceed to Step 17. 

Yes 

Proceed to next step. 

14 

Close the fuel manometer valve. Connect the 
ignition switch again to re-operate the fuel 
pump in order to verify that the fuel pressure 
can be established. 

No 

Proceed to Step 16. 

Yes 

Replace fuel and 

pressure regulator 

15 

Open the fuel manometer valve and clamp 
the fuel return pipe with the fuel tube clamp 
to stop the fuel return in order to verify that 
the fuel pressure can be established quickly. 

No 

Repair or replace the 

fuel injector or fuel 

pipe 

Yes 

Repair or replace the 

fuel inlet pipe 

16 

Verify that the fuel inlet pipe has any 
leakage or blockage. 

No 

Replace the fuel pump

Yes 

Repair or replace the 

fuel return pipe 

17 

Verify that the fuel return pipe has any 
leakage or bending. 

No 

Replace the fuel 

pressure regulator 

Yes 

Proceed to next step. 

18 

Connect an adapter between ECU and the 
wiring harness. Then verify that there is any 
voltage at the ECU’s pin No.44, 45, 63, 12 
and 13, and to see whether the positive 
power supply wires connected to the above 
ECU’s pins and the ground wires connected 
to the pin No. 3, 51, 53, 61 and 80 are 
normal. 

No 

Repair or replace the 

wiring harness. 

Yes Repair 

19 

Verify that the parts of air intake system 
have any air leakage. 

No 

Proceed to next step. 

Yes 

Repair or replace 

20 

Verify that the absolute pressure and 
temperature sensor of air intake manifold has 
any blockage. 

No 

Proceed to next step. 

Yes 

Proceed to next step. 

21 

Verify that the coolant temperature sensor is 
normal. 

No 

Repair or replace 

Yes 

Fix the mechanical 

malfunction 

22 

Verify that the unsuccessful startup is due to 
mechanical reasons such as excessive 
clearance between the piston and cylinder or 
due to cylinder air leakage, etc. 

No 

Replace the ECU 

 

 

 

 

 

G-65

 

3) Difficult start-up of hot engine 

Item 

No. 

Operation procedure 

Inspection 

results 

Follow-up 

procedure 

Yes 

Fix the indicated 

malfunction 

1 

Turn the ignition switch to “ON” position. 
Inspect with the diagnostic tester to see 
whether there is any malfunction 
information record. 

No 

Proceed to next 

step. 

Yes 

Proceed to next 

step. 

2 

 
Connect the fuel manometer valve. Short 
the 30# and 87# pins of the fuel pump relay 
to operate the fuel pump in order to verify 
that the fuel pressure is maintained at about 
350kPa. 

No 

Proceed to Step 9. 

Yes 

Proceed to next 

step. 

3 

Disconnect the connecting fuel pipe and 
turn off the ignition switch. After 1 hour, 
verify that the pressure of fuel system is 
maintained between 250-300 kPa. 

No 

Repair the leakage 

of fuel system 

Yes 

Replace the fuel 

pressure regulator 

4 

Connect the connecting fuel pipe and block 
the fuel return pipe with the fuel tube clamp 
as well as close the fuel manometer valve. 
Then turn off the ignition switch, after 1 
hour, verify that the pressure of fuel system 
is maintained between 250-300 kPa. 

No 

Proceed to next 

step. 

Yes 

Replace the fuel 

injector and fuel 

pipe 

5 

Verify that the fuel injector and fuel pipe 
have any fuel leakages. 

No 

Proceed to next 

step. 

Yes 

Inspect the coolant 

temperature and 

circuit 

6 

Disconnect the connector of water 
temperature sensor to start up the engine. 
Observe whether it can successfully start up.

No 

Proceed to next 

step. 

Yes 

Proceed to next 

step. 

7 

Put adaptor between ECU and wiring 
harness. Then verify that there is any 
voltage at the ECU’s 44#, 45#, 63#, 12# and 
13# pins and to see whether the positive 
power wires connected to the above ECU’s 
pins and the ground wire connected to the 
pins of 3#, 51#, 53#, 61# and 80# are 
normal. 

No 

Repair or replace 

the wiring harness 

 

G-66

 

Yes End 

No 

Replace the ECU 

8 

Replace the fuel and try the hot start again. 
Observe whether it can successfully start up.

No 

Repair or replace 

Yes 

Proceed to next 

step. 

9 

Verify that the fuel pipe has any blockage or 
bending and to see whether the pressure 
regulating valve functions of fuel pump is 
normally. 

No 

Repair or replace 

Yes 

Proceed to next 

step. 

10 

Inspect with multimeter to see whether there 
is a voltage between two terminals of the 
plug in connector of fuel pump. 

No 

Repair or replace 

fuel pump relay 

and wire 

Yes 

Proceed to next 

step. 

11 

Inspect with multimeter to see whether the 
resistance of fuel pump is correct. 

No 

Replace the fuel 

pump 

Yes 

Replace the fuel 

pump 

12 

Verify that the fuel pump is jammed. 

No 

Replace the ECU 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

G-67

 

4) Difficult start-up under normal engine speed 

Item 

No. 

Operation procedure 

Inspection 

results 

Follow-up procedure 

Yes 

Fix the indicated 

malfunction 

1 

Turn the ignition switch to “ON” 
position. Inspect with the diagnostic 
tester to see whether there is any 
malfunction information record. 

No 

Proceed to next step. 

Yes 

Proceed to next step. 

2 

Verify that the air filter is free of any 
blockage. 

No Replace 

Yes 

Proceed to next step. 

3 

After start up, verify that the air intake 
manifold pressure is maintained between 
35-65 kPa at idle speed. 

No 

Fix the leakage of    air 

intake system 

4 

Step on the throttle gently and observe 
whether it’s easy to start up. 

Yes 

Replace and inspect the 

throttle valve and idle 

speed passage 

Yes 

Proceed to next step. 

5 

Connect the fuel manometer valve. Short 
the 30# and 87# pins of the fuel pump 
relay to operate the fuel pump in order to 
verify that the fuel pressure is 
maintained at about 350kPa. 

No 

Proceed to Step 9 

Yes 

Proceed to Step 8 

6 

Apply a voltage supply of 12V directly 
between the battery and the fuel injector 
with special connector, and verify that 
the fuel injector functions normally. 

No 

Proceed to next step. 

Yes 

Proceed to next step. 

7 

After washing and cleaning the fuel 
injector, verify that its function is 
normal. 

No 

Replace the fuel 

injector 

Yes 

Replace the fuel 

8 

Replace the fuel and verify that the fuel 
is deteriorated or contaminated by water.

No 

Proceed to Step 14 

Yes 

Proceed to next step. 

9 

Verify that the fuel pressure is lower 
than 350kPa. 

No 

Proceed to Step 13 

Yes 

Proceed to next step. 

10 

Close the fuel manometer valve. 
Connect the ignition switch again to 
re-operate the fuel pump in order to 
verify that the fuel pressure can be 
established. 

No 

Proceed to Step 12. 

Yes 

Replace fuel pressure 

regulator 

11 

Open the fuel manometer valve and 
clamp the fuel return pipe with the fuel 
tube clamp to stop the fuel return in 
order to verify that the fuel pressure can 
be established quickly. 

No 

Repair or replace the 

fuel injector or the fuel 

pipe 

12 

Verify that the fuel inlet pipe has any 
leakage or blockage. 

Yes 

Repair or replace the 

fuel air inlet pipe 

 

G-68