Chery S11 / Chery QQ. Manual - part 235

 Chery  QQ  Maintenance Manual                   465 EFI System

 

 

 
1） Engine does not run or run slowly on starting 
 

No. 

Operation steps 

Test step 

Next step 

Yes Next 

1 

Check if the voltage between two poles on 

battery is 10—12.5 V. 

No 

Repair or replace 

battery 

Yes Next 

2 

Turn on ignition key. Check if the voltage on 

positive poles of battery connected with the key 

is 10—12.5 V. 

No 

Repair poles or replace 

wires 

Yes Next 

3 

Keep ignition key on start position. Check if the 

voltage on positive pole of stater connected with 

ignition key is 8V. 

 

No 

Replace bulb, replace 

actuator, repair or 

replace ignition key 

Yes Next 

4 

Keep ignition key on start position. Check if the 

voltage on positive pole of stater is 8V. 

 

No 

Repair poles or replace 

wires 

Yes 

Repair or replace start 

motor 

5  

Use multimeter to check if open or short for 

starter. 

No Next 

Yes trouble 

shooting 

6 

Check if engine blocks for bad lubrication. 

 

No Next 

Yes 

Replace suitable oil 

7 

If in winter, check if the resistance of starter is 

too big that resulted by wrong lubricant or gear 

oil. 

No 

Repair or replace 

timing belt 

 
 
 
 
 
 
 

 

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 Chery  QQ  Maintenance Manual                   465 EFI System

 

 

 
2） Engine can run but cannot start successfully (with distributor) 
 

No. 

Operation steps 

Check step

Next step 

Yes Eliminate 

malfunction 

1 

Turn on ignition key. Use tester to check if 
malfunction information record exisits.   

No Next 

Yes 8 

2 

Pull out cylinder wire and connect ignition plug 
with the electrode 5—10mm from engine body. 
Run engine with starter and check if high voltage 
ignition in blue and white appears. 

No Next 

Yes  

Next 

3 

Check if the resistance of high voltage wire is 
normal (about 16k/ m. For exact data, please 
touch manufacture). 

No 

Repair or replace 
high voltage wire 

Yes Replace 

4 

Check if any ablation damage or crack on 
distributor cove and distributor. 

No Next 

Yes Replace 

5 

Check if any loose or damage for identification 
ring in distributor. 

No Next 

Yes Next 

6 

Check if ignition coil is normal. 
 

No Replace 

Yes Next 

7 

  Check if distributor and high voltage coil 
inserter is good. 

No Connect 

plug 

Yes Next 

8 

Turn on ignition key. Check if fuel pump relay 
and fuel pump can work for 3 seconds.   

No 

Repair fuel pump 
circuit 

Yes Next 

9 

Connect fuel pessure gauge valve. Short pin 30 
on fuel pump relay and pin 87 to start fuel pump. 
Check if fuel pressure is 250—300 kPa. 

No 13 

Yes 12 

10  Pull out fuel distribution pipe together with 

injector. Pull out injector connector on harness. 
Supply 12V voltage directly from battery to 
injector. Check if injector can inject fuel. 

No Next 

Yes Next 

11  

Re-check if injector can inject fuel after cleaning.

No Replace 

injector 

Yes 

Replace fuel oil 

12  Check If fuel deteroprate or containing water. 

No 18 

Yes Next 

13  

Check if fuel pressure below 250kPa. 

No 17 

14   Yes 

Next 

 

38

 Chery  QQ  Maintenance Manual                   465 EFI System

 

 

 

Shut off fuel gauge valve. Connnect ignition key 

again to run fuel pump for 3 seconds. Check if 

fuel pressure can be set up. 

No 16 

Yes 

Replace oil pressue 

regulator 

15   

Open fuel gauge valve, use return fuel blocker to 

clamp fuel pipe for no returning fuel. Check if 

fuel pressure can be set up soon. 

No 

Repair or replace 

injector and oil pipe 

Yes 

Repair or replace oil 

inlet 

16   

Check if fuel pipe is leaked or blocked. 

 

No   

Replace fuel pump 

Yes 

Repair or replace oil 

return pipe 

17   

Check returning fuel pipe is blocked or bend. 

No   

Replace fuel pressure 

regulator 

Yes    Next 

18    Connect adaptor between ECU and harness. 

Check if voltage exisit on pin 18,27,37. Check if 

the positive source on above pins and ground 

wires of pin 2,14,24,19 on ECU are normal. 

No   

Repair or replace 

harness 

Yes  

Repair 

19  Check if intake air system parts are leakage. 

No  

Next 

Yes 

Repair or replace 

20   

Check if MAP or IAT are blocked. 

No Next 

Yes Next 

21   

Check if ECT is normal. 

No   

Repair or replace 

Yes Eliminate 

malfunction 

22  Check if engine cannot start because mechanical 

reason such as cylinder head spacing and 

cylinder leakage. 

No Replace 

ECU 

 
 
 

 

39

 Chery  QQ  Maintenance Manual                   465 EFI System

 

 

3） Heat start difficult 

No. Operation 

steps  Test 

results 

 

Next step 

Yes Eliminate 

malfunction 

1 

Turn onignition key. Use tester to check if 
malfunction information record exisits. 

No Next 

Yes Next 

2 

Connect fuel pessure gauge valve. Short pin 30 on 
fuel pump relay and pin 87 to start fuel pump. 
Check if fuel pressure is 250—300 kPa. 

No 9 

Yes Next 

3 

Disconnect fuel pipe. Shut off ignition key. After 1 
hour, check if pressure in fuel system can keep 
150—200 kPa. 

No 

Repair fuel system 
leakage 

Yes 

Replace fuel pressure 
regulator 

4 

Connect fuel pipe. Use returning fuel blocker to 
block returning fuel pipe and shut off fuel pressure 
gauge valve. Shut off ignition key. After 1 hour, 
check if pressure in fuel system can keep 150—200 
kPa. 

No Next 

Yes 

Replace injector and 
oilpipe 

5  

Check if injector and fuel pipe leaks fuel. 

No Next 

Yes Check 

coolant 

temperature and 
circuit 

6 

Pull out water temperature sensor connector and 
run engine. Check if engine can start. 

No   Next 

Yes Next 

7 

Connect adaptor between ECU and harness. Check 
if voltage exisit on pin 18,27,37. Check if the 
positive source on above pins and ground wires of 
pin 2,14,24,19 on ECU are normal. 

No 

Repair or replace 
harness 

Yes   Harness 

8 

Replace fuel and heat start engine again. Check if 
engine can start. 

No   Replace ECU 

Yes   Next 

9 

Check if fuel pipe blocked or bend, or if fuel pump 
regulator can work normally. 

No 

Repair or replace 

Yes Next 

10    Use multimeter tocheck if voltages between two 

ends of fuel pump inserter exists. 

No 

Repair or replace fuel 
pump relay and 
leading line 

Yes Next 

11  

Check if fuel pump resistance is correct. 

No 

Replace fuel pump 

Yes 

Replace fuel pump 

12  

Check if fuel pump blocked. 

No Replace 

ECU 

 
 

 

40