Chery QQ6 (S21) / S12LHD. Manual

4. When installing cylinder cushion, install it with

the side with word up.

Note:

The cylinder cushion has been applied with

sealant, so, providing that the cylinder head or cylinder

block has been disassembled, be sure to replace the

cylinder cushion.

5. When installing piston ring, remember to leave

the side of the second ring with word up.

6. The opening position of the piston ring during

installation is as shown in the figure.

7. The label on piston head prompts direction and

position of installation.

8. Use a special tool to install the piston ring.

9. When installing connecting rod bearing shell, pay

attention to installation mark.

First ring

Second ring

Oil ring

First ring

Second ring

Front Liner ring

Rear

Lower blade

Upper blade

10. Method for shell matching.

The tightening torque for installing the fixing bolt of

connecting rod bearing is 25±3Nm (then turn 90±5°

clockwise).

Note:

The machining technique for connecting

rod and connecting rod shell cap adopts Instantly

Swell and Break machining method, so, each

machined surface maintains the shape of original

material. When installing, keep any sundries out

of this machined surface. In addition, only the

two machined surface of the same connecting rod

can completely engage.

11. Use the piston installation special tool to install

the piston.

12. Tighten the fixing bolt of connecting

rod bearing cap.

Tightening torque:

First time: 25±3Nm. Second time: turn

90±5 °.

13. Install the main bearing cap and then

follow the order as shown in the figure to

tighten the bolt.

Tightening torque:

First time: 45±5Nm.

Second time: turn 180±10°.

14. Tighten the fixing bolt of main

bearing cap and cylinder block.

Torque: 20+3 Nm.

Service Manual for Chery

QQ6

(UMC EFI for 473F Engine)

After Sales Service Department of Chery

Automobile Sales Co., Ltd.

CONTENTS

CHAPTER ONE DISASSEMBLY AND INSTALLATION OF ELECTRONIC FUEL

INJECTION SYSTEM.......................................................................................................................4

I. Disassembly and Installation of Components of Electronic Fuel Injection System ..................4

CHAPTER TWO PRINCIPLE OF ELECTRONIC FUEL INJECTION SYSTEM ...................6

I. Overhaul of System Components ..............................................................................................6

1. Intake Air Temperature Pressure Sensor ...........................................................................6

2. Tachogenerator of Engine .................................................................................................8

3. Phase Sensor ...................................................................................................................10

4. Water Temperature Sensor ..............................................................................................10

5. Knock Sensor ..................................................................................................................12

6. Electric Throttle Body.....................................................................................................12

7. Oxygen Sensor ................................................................................................................13

8. Fuel Pump Assembly ......................................................................................................16

9. Injector ............................................................................................................................17

10. Ignition Coil ..................................................................................................................19

11. Spark Plug .....................................................................................................................21

12. Carbon Canister Solenoid Valve Control ......................................................................22

13. Electronic Accelerator Pedal.........................................................................................24

14. Three-way Catalytic Converter .....................................................................................24

15. Fan Control ...................................................................................................................25

16. Position Sensor of Double Brake Pedal ........................................................................26

17. Clutch Position Sensor ..................................................................................................26

18. A/C Control...................................................................................................................27

CHAPTER TWO FUNDAMENTAL PRINCIPLE FOR FAILURE DIAGNOSIS OF

ELECTRONIC FUEL INJECTION SYSTEM .............................................................................28

1. Failure Information Records ...................................................................................................28

2. Failure State ............................................................................................................................28

3. Failure Types ..........................................................................................................................28

4. Failure Frequency Counter .....................................................................................................28

5. Limp Home .............................................................................................................................29

6. Failure Alert............................................................................................................................29

7. Readout of Failure ..................................................................................................................29

8. Clearing Failure Information Records ....................................................................................30

9. Failure Locating......................................................................................................................30

10. Failure Code Table................................................................................................................30

11. The Steps for Implementation of Failure Diagnosis According to Failure Information

Records .......................................................................................................................................35

11.1 Electronic Throttle Failure ..........................................................................................35

11.2 Knock Sensor failure...................................................................................................36

11.3 Air Pressure Sensor Failure ........................................................................................37

Chery QQ6 (S21) / S12LHD. Manual - part 97