Chery S11 / Chery QQ. Manual - part 234

 Chery  QQ  Maintenance Manual                   465 EFI System

 

 

 
 
 
 
Diagram of canistor control valve 

 

No. Next 

Steps 

Test 
result 

 

Next step 

1 

Run engine at idle to normal coolant 
temperature.  

 Next 

Yes Next 

2 

Put out the connector on canistor valve and 
check if the voltage between two pins is 12 
V. 

No 5（Check live 

wire） 

Yes Next 

3 

Reinsert conncetor of canistor valve 
harness. Run engine to 1500 RPM. Touch 
valve with hand and check if any slightly 
viabration or impact on valve. 

No 7（Check ground 

wire） 

Yes ReplaceECU 

4 

Use multimeter to check if resistance 
between pin 1 and pin 2 is 22—30. 
 

No   Replace canister 

control valve 

Yes 

Repair or replace 

harness 

5 

Use multimeter to check if open or short 
between pin 87 on main relay and pin 1 on 
valve. 

No Next 

6 

Repair or replace main relay and circuit. 

 

 

Yes 

Repair or replace 

harness 

7 

Shut off engine. Connect adaptor between 
ECU and harness. Use multimeter to check 
if open or short between pin 5 on ECU and 
pin 2 on valve. 

No Replace 

ECU 

 
 
 
 
 
 

 

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 Chery  QQ  Maintenance Manual                   465 EFI System

 

 

 
 
DTC  45  MIL driver 

                                           

 

MIL 

power 

The diagram of MIL 
 

NO. Next 

Steps  Test 

result 

Next step 

1 

Turn on ignition key 

 

Next 

Yes Next 

2 

Remove instrument panel. Put out MIL bulb. Use 
multimeter to check if the voltage in MIL socket is 
12 V. 
 

No 5（Check live 

wire） 

Yes Next 

3 

Use multimeter to check if MIL bulb is good. 
 

No Replace 

bulb. 

Yes 

Repair or replace 

harness 

4 

Connect the adaptor between ECU and harness. 
Check if open or short between pin 33 on ECU and 
input connector of MIL. 

No Replace 

ECU 

Yes Replace 

fuse 

5 

Check if the fuse in oxygen heating circuit is burn 
out. 

No Next 

Yes 

Repair or replace 

harness 

6 

Use multimeter to check if open or short between 
pin 87 on main relay and pin 1 on MIL socket. 

No Next 

7 

Repair or replace main relay and circuit. 

 

 

 
In vehicle equipped with MIL, when other fault information is recorded, MIL will be on 
except the fault of A/C evaporator temperature sensor, fuel pump driver and canistor control 
valve. 
 

 

34

 Chery  QQ  Maintenance Manual                   465 EFI System

 

 

 
DTC    61,62      No. 1 and No.2 coil driver in step motor   

                                                 

 

 

The diagram of idle actuator/step motor 
 

No. Operation 

steps 

Test 

results 

Next step 

1 

Turn on ignition key but engine not run. 

 

Next 

Yes Next 

2 

。

Put out the connector on step motor    and 

check if the resistance between pin A, pin 
D,and pin B, pin C is 40—80. 

No Replace 

idle 

actuator  

 

Yes Next 

3 

Use multimeter to check if the resistance 
between pin A and pin B as well as Pin B 
and pin D are infinite. 

No  

Replace bulb or 
actuator 

Yes Replace 

actuator 

 

4 

Use multimeter to check if voltages between 
pin A and pin D as well as pin B and pin C 
are 12V

　

. 

No Next 

Yes 

Repair or replace 
harness 

 

5 

Connect adaptor between ECU and harness. 
Use multimeter to check if open or short 
between pin 29,pin 4, pin 26, pin 21 on 
ECU and pin A, B, C D on step motor. 

No Replace 

ECU 

 

 
 
 

 

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 Chery  QQ  Maintenance Manual                   465 EFI System

 

 

6. The diagnosis steps according to engine symptoms 
Before beginning diagnosis steps according to engine symptoms, the primary checking should 
be carried out: 
(1)  Make any abnormal situation for ECU and MIL (except vehicle without MIL). 
(2)  Use diagnoses instrument or flashlight to check to insure no any malfunction information 

records. 

(3)  Use diagnoses instrument to check the idle data on heated engine of EFI system to insure 

everything is OK. 

 
Name Parameter 
Intake temperature: tans 

20-70 C

　

 

Battery voltage: ub 

12-14V 

Engine coolant temperature: tmot 

80-90 C

　

 

Engine load:tl 

1.8-3.0ms 

A/F ratior 

5%-5% 

Ignition advance angle 

5-10 CA

　

 

Throttle angle of rotation wdkbl 

0 

Injection time 

4-7ms 

Engine speed n 

Expected idle±50rpm 

Canistor control valve ratio 

0 

Self adaption for F/A ratio:xfra 

0.95-1.05 

Self adaption for F/A ratio:xtra 

120-140 

Intake manifold absolute pressure 

350-650hPa 

Oxygen sensor voltage 

0.1-0.8V   

Intake quantity 

6-12kg/h 

Idle adjust state 

60-100 

 
(4)  Make sure the sysptoms that driver told exisist and check the exact position of sysptom. 

Then begin appearance check: 

Check if clear or substance on harness ground. 
Check if any break, tweast in vaccum pipe or if connect correctly. 
Check if any block in vaccum pipe. 
Check if any stave or damage on intake air pipe. 
Check if the seal between throttle body and manifold is good. 
Check if any break, aging on high voltage line in ignition system or connect correctly. 
Check if the connection of wires is correct or any loose/bad contact on connector. 
 
 
 
 

 

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