Chery S11 / Chery QQ. Manual — part 209

Chery QQ Maintenance Manual 372 EFI System

主继电器

缸

缸

缸

喷油器组

The diagram of injector

No.

Operation steps

Test result Next step

1

Turn on ignition key without engine run.

Next

2

Put out al connectors on injector harness; connect two
probes of multimeter on pin 1 and engine ground.

Next

Yes

Repeat step 2

Yes 6

3

Turn on ignition key. See if the display on multimeter
is 12 V for 1 second once turning on the key.

No Next

Yes

Repair or replace

harness

4

Use multimeter to check if open or short between
pin 87 on pump relay output and pin 1 on each
injector.

No

Next

5

Repair or replace pump replay, main repalay and
circuit.

Yes

Repair or replace

harness

6

Connect the adaptor between ECU and harness.
Check if open or short between pin 24, pin 61, pin 23
on ECU and pin 2 on each injector separately.

No Next

Yes

Repeat step 7

Yes Next

7

Use multimeter to check if resistance between pin 1
and pin 2 on injector is 12—16V in 20 C

.

No

Replace

injector

Yes

Repeat step 8

8

Reinsert all injector connector. Put N shaft and run
engine in idle. Put out each injector connector in turn
and check if the vibration of engine becoe serious.

No Replace

ECU

Chery QQ Maintenance Manual 372 EFI System

Canistor control driver

Diagram

of canistor control valve

No. Operation

steps

Test
result

Next step

1

Run engine in 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 26 on ECU and
pin 2 on valve.

No Replace

ECU

Chery QQ Maintenance Manual 372 EFI System

MIL driver

The diagram of MIL

NO.

Operation 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
70 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.

Chery QQ Maintenance Manual 372 EFI System

No. 1 and No.2 coil driver in step motor

怠速步进电机

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 1, pin

2,and pin 3, pin 4 is 40—80.

No Replace

idle

actuator

Yes Next

3

Use multimeter to check if the resistance

between pin 1 and pin 2 as well as Pin 3 and

pin 4 are infinite.

No

Replace bulb or

actuator

Yes Replace

actuator

4

Use multimeter to check if voltages between

pin 1 and pin 2 as well as pin 3 and pin 4 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 19,pin 20, pin 35, pin 36 on ECU

and pin1,2,3,4 on step motor.

No Replace

ECU

6. The diagnosis steps according to engine symptoms
Before beginning diagnosis steps according to engine symptoms, the primary checking should