Chery S11 / Chery QQ. Manual — part 233

Chery QQ Maintenance Manual 465 EFI System

The diagram of MAP and IAT

No.

Next Steps

Test result

Next step

1

Turn on ignition key.

Next

Yes Next

2

Put out the connectors on MAP and IAT
harness.Check if the voltage between pin
1 and pin 3 is 5 V.

No 4

Yes

Replace ECU

3

。

Check if the resistance between pin 1

and pin 2 is suit to the temperature ( see
related parts in this manual).

No

Replace sensor

Yes

Repair or replace
harness

4

Connect the adaptor between ECU and
harness. Check if open or short between
pin 30, pin 12, pin 44 on ECU and pin 1,
pin 3, pin 2 separately.

No Replace

ECU

29

Chery QQ Maintenance Manual 465 EFI System

DTC 19 Coolant temperature sensor

The diagram of CTS

No.

Next Steps

Test result Next step

1

Turn on ignition key.

Next

Yes tNext

2

Put out the connector on CTS harness, check if
the voltage between pin 1 and pin 2 is 5V.

No 4

Yes Replace

ECU

3

Check if the resistance between pin 1 and pin 2
is suit to the temperature ( see related parts in
this manual).

No

Replace sensor

Yes

Repair or replace
harness

4

Connect the adaptor between ECU and harness.
Check if open or short between pin 30, pin 45
on ECU and pin 1, pin 2 separately.

No Replace

ECU

DTC 22、23、24（、21） in CYL 1, CYL 2, CYL 3 (CYL 4) injector driver

30

Chery QQ Maintenance Manual 465 EFI System

The diagram of injector

No.

Next 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

31

Chery QQ Maintenance Manual 465 EFI System

6

Connect the adaptor between ECU and harness.

Check if open or short between pin 17, pin 16,

pin 35, pin 34 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

electromagnetism

injector

Yes

Repeat step 8

8

Reinsert all injector connector. Put N shaft and

run engine at idle. Put out each injector

connector in turn and check if the vibration of

engine becoe serious.

No Replace

ECU

DTC 25 Canistor control driver

Main relay
Pin 87

canistor
control

valve

32