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.

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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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