Chery QQ6 (S21) / S12LHD. Manual — part 261
return pipe by oil return baffle so that the oil can
not return. Check if the oil pressure occurs
immediately.
No
Repair and replace
fuel injector and
oil pipe
Yes
Repair or replace
oil intake pipe
13
Check if there is leaking or jam in oil intake
pipe.
No
Replace oil pump
Yes
Repair or replace
oil return pipe
14
Check if the oil return pipe is bended or
jammed.
No
Replace
fuel
pressure regulator
Yes
Next step
15
Put the ignition switch to “ON”. Check if
voltage on the following pins of ECU is normal:
if it is a battery voltage around 12V on 12#, 14#,
15# pins; if the voltage between 51#, 53#, 3#,
61#, 80# pins and the wire is zero.
No
Repair or replace
cable
Yes
Replace ECU
16
Check if ignition coil, ignition cable and spark
plug are normal.
No
Adjust or replace
the parts involved
Note: This phenomenon indicates a comparatively obvious failure and some minute
details, such as if strainer of the system or exhaust pipe is blocked and so forth, should
also be checked. For other causes, check spark plug and ignition cable etc.
12.14 Slow Response when Accelerating
Yes
Remove the failure
displayed
1
Put the ignition switch to “ON”. Use a failure
diagnostic tester to check if any failure
information record exists.
No
Next step
Yes
Next step
2
Turn off the engine. Check the air cleaner and
look if it is open.
No
Replace
Yes
Next step
3
Run the engine at idle speed and check if the
engine revolution speed is normal at idle speed.
No
Repair in accordance
with
idle
speed
failure item
Yes
Next step
4
Run the engine at idle speed and check if the air
intake pressure is from 35 to 65 kPa.
No
Overhaul
Yes
Next step
5
Put the ignition switch to “ON”. Check if it is
break or short circuit between 38#, 32#, 54#,
36# pins on ECU connector and 1#, 2#, 4#, 6#
pins of throttle position sensor of electronic
throttle valve body.
No
Repair or replace
Harness
Yes
Next step
6
Let engine run at idle speed, after coolant
temperature reaches normal value, then use a
diagnostic tester to check if ignition advance
angle is normal.
No
Check other part
Yes
Next step
7
Connect fuel manometer valve. Short 30# and
87# pins of fuel pump relay to make the fuel
pump run, and then check if fuel pressure is
around 4000kPa.
No
11
Yes
10
8
Use a special joint to directly provide 12V
power supply and intermittent 12V power
supply from battery to injector and check if the
injector can work intermittently.
No
Next step
Yes
Next step
9
Clean out the fuel injector and look if it can
work correctly.
No
Replace fuel injector
Yes
Replace fuel
10
Check if fuel is bad or moisture.
No
16
Yes
Next step
11
Check if the fuel pressure value is below 300
kPa.
No
15
Yes
Next step
12
Close the fuel manometer valve. Re-engage the
ignition switch to let the fuel pump run for a
period of time, and then check if fuel pressure
can be built up.
No
14
Yes
Replace the pressure
regulator
13
Open the valve of fuel gauge and clamp the oil
return pipe by oil return baffle so that the oil can
not return. Check if the oil pressure occurs
immediately.
No
Repair and replace
fuel injector and oil
pipe
Yes
Repair or replace oil
intake pipe
14
Check if there is leaking or jam in oil intake
pipe.
No
Replace oil pump
Yes
Repair or replace oil
return pipe
15
Check if the oil return pipe is bended or
jammed.
No
Replace the pressure
regulator
Yes
Replace or clean
16
Check if the exhaust system and three-way
catalytic converter are jammed.
No
Replace ECU
Note: For slow response when accelerating, mainly check air intake pressure and injection pulse-width
etc.; choked exhaust pipe and smudgy air cleaner may be causes for this problem. In addition, spark plug
and ignition cable problems may also be causes.
12.15 Poor Performance and Disability when Accelerating.
Yes
Repair
1
Check if failure occurs, such as clutch slipping,
low tire pressure, brake delay, wrong tire size
and incorrect four-wheel alignment.
No
Next step
Yes
Next step
2
Check if the electronic throttle can be full
opening.
No
Repair or replace the
throttle
Yes
Remove the failure
displayed
3
Put the ignition switch to “ON”. Use a failure
diagnostic tester to check if any failure
information record exists.
No
Next step
Yes
Next step
4
Let engine run at idle speed, after coolant
temperature reaches normal value, then use a
diagnostic tester to check the ignition advance
angle.
No
Check
the
parts
involved
Yes
Next step
5
Put the ignition switch to “ON”. Check if it is
break or short circuit between 38#, 32#, 54#,
36# pins on ECU connector and 1#, 2#, 4#, 6#
pins of throttle position sensor of electronic
throttle valve body. check if the voltage between
17# and 42# pins of ECU, between 39# and 17#
pins of ECU (signal output terminal of intake air
temperature sensor and coolant temperature
sensor) as well as 64#, 65#, 66#, 67# pins of
ECU (for control of DC motor) is normal.
No
Repair or replace
Harness
Yes
Next step
6
Run the engine at idle speed and check if the air
intake pressure is from 35 to 65kPa.
No
Overhaul
Yes
Next step
7
Connect fuel manometer valve. Short 30# and
87# pins of fuel pump relay to make the fuel
pump run, and then check if fuel pressure is
around 400kPa.
No
11
Yes
10
8
Use a special joint to directly provide a 12V
power supply and intermittent ground wire from
battery to injector and check if the injector can
work intermittently.
No
Next step
Yes
Next step
9
Clean out the fuel injector and look if it can
work correctly.
No
Replace fuel injector
Yes
Replace fuel
10
Check if fuel is deteroprated or moisture.
No
16
Yes
Next step
11
Check if the fuel pressure value is below 300
kPa.
No
15
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