Chery S11 / Chery QQ. Manual — part 213
Chery QQ Maintenance Manual 372 EFI System
11）Idle is too high (ECU needs self-study again)
Yes Eliminate
malfunction
1
Turn on ignition key.Use diagnostic equipment to
check if malfunction information record exists。
No Next
Yes Adjust
or
replace
2
Check if throttle pedal bracing wire is blocked or
too tight
No Next
Yes Repair
or
replace
3
Check if canistor control valve,fuel pressure
regulator,PVC vacuum pipe and vacuum
power-assisted hose of braking system are good
No Next
Yes Next
4
Step down brake pedal and check if idle is too high
while engine idle running and in neutral.
No 6
Yes Repair
or
replace vacuum
actuator
5
Clamp vacuum power-assisted hose and check if
idle is normal
No Next
Yes Replace
PVC
6
Clamp PVC vacuum hose and check if idle is
normal
No Next
Yes Replace
canistor
control valve
7
Clamp canistor control valve hose and check if idle
is normal
No Next
Yes
Repair or
replace
8
Check if idle actuator is not flexibly or blocked
No
Next
Yes Repair
or
replace
9
Check if intake pipe have leak
No Next
Yes Next
10 Check if sealing washer of injector is good
No Replace
sealing
washer
Yes Replace
ECU
11 Check if MAP and IAT are good
No
Replace sensor
12）Speed of engine is low or switch off while speeding up
Yes Eliminate
malfunction
1 Turn on ignition key.Use diagnostic equipment to
check if malfunction information record exists。
No Next
Yes Next
z2 Check if air filter is through
No Replace
Yes Next
3 Check if speed is narmal at idle
No Next
Chery QQ Maintenance Manual 372 EFI System
Yes Next
4 Check if intake pressure is 35—65 kPa in idle
No Repair
Yes Next
5 Run engine in idle. After coolant temperature
reaches normal, check if ignition advance angle is
normal
No Adjust
ignition
advance angle
Yes Next
6 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 10
Yes 9
7 Use special connector to supply 12 V voltages
from battery to injector and check if injector works
normally.
No Next
Yes Next
8 Re-check if injector can inject fuel after cleaning.
No Replace
injector
Yes Replace
fuel
9 Check if fuel is deterirate or containing water
。
No 15
Yes Next
10 Check if fuel pressure below 250kPa.
No 14
Yes Next
11 Shut off fuel gauge valve. Connect ignition key
again to run fuel pump for 3 seconds. Check if fuel
pressure can be set up.
No 13
Yes
Replace fuel pressure
regulator
12 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
Replace and repair
injector or fuel pipe
Yes
Repair or replace fuel
inlet
13 Check if fuel pipe is leaked or blocked.
No
Replace fuel pump
Yes
Repair or replace
returning fuel pipe
14
Check returning fuel pipe is blocked or bend.
No
Replace fuel pressure
regulator
Yes Next
15 Turn on ignition key. Connect adaptor between
ECU and harness. Check if voltages on pin
32( output signal for TPS) ,pin 38 (ground
connection)and pin 45( for 4.5-5V power of
sensor) are normal.
No
Repair or replace
harness
Yes Replace
ECU
16 Check if ignition coil,distrbutor,high voltage wire
and spark plug are normal
No
Repair or replace
relate unit
Chery QQ Maintenance Manual 372 EFI System
13）Speeding up is slow
Yes Eliminate
malfunction
1 Turn on ignition key.Use diagnostic equipment to
check if malfunction information record exists
No Next
Yes Next
2 Shout off engine .Check if air filter is through
No Replace
Yes Next
3 Check if speed is narmal in idle
No
Refer to trouble
shooting of idle system
Yes Next
4 Check if intake pressure is 35—65 kPa in idle
No Repair
Yes Next
5 Turn on ignition key. Connect adaptor between
ECU and harness. Check if voltages on pin
32( output signal for TPS) ,pin38 (ground
connection)and pin 45( 4.5-5V power for sensor)
are normal.
No
Repair or replace
Yes Next
6 Run engine in idle. After coolant temperature
reaches normal, check if ignition advance angle
is normal
No
Adjust ignition advance
angle
Yes Next
7 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 11
Yes 10
8 Use special connector to supply 12 V voltages
from battery to injector and check if injector
works normally.
No Next
Yes Next
9 Re-check if injector can inject fuel after cleaning.
No Replace
injector
Yes Replace
fuel
10 Check if fuel is deterirate or containing water
No 16
Yes Next
11 Check if fuel pressure below 250kPa.
No 15
Yes Next
12 Shut off fuel gauge valve. Connect ignition key
again to run fuel pump for 3 seconds. Check if
fuel pressure can be set up.
No 14
Yes Replace
pressure
regulator
13 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 and replace
injector or fuel pipe
Yes
Repair or replace fuel
pipe
14 Check if fuel pipe is leaked or blocked.
No
Replace fuel pump
Chery QQ Maintenance Manual 372 EFI System
Yes
Repair or replace fuel
pipe
15 Check returning fuel pipe is blocked or bend.
No Replace
pressure
regulator
Yes
Replace or cleaning
16 Check if exhaust system and TWC is blocked
No Replace
ECU
14）Poor performance of acceteration and power lessness
Yes Repair
1
Check if exist malfunction as following: clutch
slipping,air pressure of tire is low,braking
drag,size of tire and four-wheeled alignment
are miscorrect
No Next
Yes Next
2
Check if throttle can full-open
No
Rpair or replace throttle
Yes Eliminate
malfunction
3
Turn on ignition key.Use diagnostic equipment
to check if malfunction information record
exists。
No Next
Yes Next
4
Run engine in idle. After coolant temperature
reaches normal, groun pin 51 on ECU and
check if ignition advance angle is 6.75
crank
angle.
No
Adjust ignition advance
angle
Yes Next
5
Turn on ignition key.Connect adaptor between
ECU and harness. Check if voltages on pin
48,60,45,28( output signal for MAP,IAT,ECT
and oxygen sensor),1,2(ground),22(ignition
switch)and pin 19,20,35,36(output to idle
actuator)are normal
No
Repair or replace
harness
Yes Next
6
Check if intake pressure is 35—65 kPa in idle
after start
No Repair
Yes Next
7
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 11
Yes 10
8
Use special connector to supply 12 V voltages
from battery to injector and check if injector
works normally.
No Next
Yes Next
9
Re-check if injector can inject fuel after
cleaning.
No Replace
injector
Yes Replace
fuel
10 Check if fuel is deterirate or containing water
No 16
Yes Next
11 Check if fuel pressure below 250kPa.
No 15
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