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
37
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
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