Chery S11 / Chery QQ. Manual - part 35

Chery QQ Service Manual Chassis System

Put down pedal >60mm and fix with bracket to prevent liquid flow out.
Remove the brake pipe AB on master cylinder and marked with dot. Block the

outlet with rubber cover.

Remove brake liquid pipe 1—4 and marked with dot. Block the outlet with rubber

cover.

Loosen the bolts fixing HECU to support.
Remove HECU from support.

(4)、Replace HECU

Remove the harness of pump motor.
Remove 4 bolts and don’t reuse.
Separate HCU and ECU.
Install new HCU on ECU.
Screw the bolts fixed HCU on ECU with torque 2-4 Nm.
Insert the harness of motor.

2
3

(5)、Replace ECU

Remove the harness.
Remove 4 bolts and don’t reuse.
Remove HCU from ECU.
Install new HCU on ECU.
Screw the bolts fixed HCU on ECU with

torque 2-4 Nm.

Insert the harness of motor.

(6)、Install ABS assembly again
Attention：Only remove the cover on hydraulic
outlet while install the brake pipe to prevent
the matter dropping into system.

Install ABS assembly on support with torque 16-24Nm.

A 前活塞 B 后活塞

1 右前轮 2 左后轮

右后轮

左前轮

A.Front piston; B.Rear piston

1.Right front wheel;2.Left rear wheel

3.Right rear wheel;4.Left front wheel

Remove the cover on hydraulic outlet and install brake pipe with torque 8-16Nm

M10×1 and 12-18Nm M12×1.

Make sure the pipe is installed correctly.
Charge new brake fluid to MAX position and exhaust gas according to

specification.

Turn on ignition switch, ABS warning light will be up for 1.7 second and turn

off.

Clear DTC.
Drive the vehicle to confirm the function of ABS and feel pedal is rebound.

11、ABS ECU Socket

Chery QQ Service Manual Chassis System

12、Electric circuit diagram MK20 I/E

30A

S5
3

30A

S5
4

至电瓶侧
60A保险丝

6.0红

C118-1

C118-3

C118-2

C118-4

速

感

右
前
轮
车
速
传
感
器

车
速
传
感
器

2.0

棕
0

右
后
轮
车

传

器

左
后
轮

左
前
轮

黑0.5

绿0.5

兰0.5

棕0.5

黑0.5

棕0.5

绿0.5

黑0.5

棕

棕
2.0

红

红
2.0

/黑

红/白
0.5

白/黑

红/白

至
仪

FS
22
10A

诊断座

至制动开关

To stop switch

Battery side

60Afuses

6.0R

R/W 0.5

黑
0.

0.5

W/B

0.5

Diagnosis

socket

R 2.0

2.0

Br/B

0.5

灰/黑
0.5

Gy/B

0.5

表
ABS
灯

Instrument

ABC lamp

R/W 0.5

B0.5 G0.5 BLU0.5 Br0.5 B0.5 Br0.5 G0.5

Left

front

wheel

speed

sensor

Right

rear

wheel

speed

sensor

Left

rear

wheel

speed

sensor

Right

front

wheel

speed

sensor

Chery QQ Service Manual Chassis System

13、ECU coding

Coding the new ECU after replacing/ repairing ECU or HECU. Otherwise ABS

warning light cannot work normally.

Coding ECU with instrument, go to steps as follows：

将故障诊断仪与诊断插座连接

选择[万用 OBD-16]诊断接头

在功能项目中选择“控制单元编码”

屏幕上显示“请输入新的编码_ _ _ _ _”

（此车的编码为：01901）

按“确认”键后，屏幕上即显示

1J0907379 P ABS 20 IE CAN

001

Coding: 01901

WSC: 000001

编码完成，退出

Screen display “ please input new coding_ _

_ _ _ _” (The coding for this car: 01901)

Press“ok ” key, screen displays

Select “ control unit coding

”

Selection [Versatile OBD-16]diagnosis socket

Connect diagnosis instrument and diagnosis

socket

End coding and

quit

14、Charging and evacuating
1. Wet HCU

If HCU is wet type, charge and evacuate according to conventional brake system

after replacing HCU.
2. Dry HECU

If HCU is dry type, besides charging and evacuating according to conventional

brake system after replacing HCU, it should be operated the second loop of HECU
with instrument.

Chery QQ Service Manual Chassis System

Appendix 1

Question and answer for ABS

1. What is ABS?

ABS is abbreviation for Anti-lock Brake System. ABS ensures good brake
stability and steering on various roads to get best brake distance.

2. Why need ABS?

When braking, front wheel will lock up to lose steering ability; while rear
wheel will lock up to run to a side or slide. ABS will help you to control
vehicle and to steer clear of barrier during braking.

3. How to distinguish if your vehicle equipped with ABS?

Firstly, you could observe if the ABS warning light on instrument cluster or
on switchboard is on in short period. Secondly, you may ask your dealer.

4. How does ABS work?

The ECU in ABS will adjust the pressure on each wheel brake through solenoid
according to VSS signal. It just likes a good driver but with much faster
reflection.

5. How to distinguish ABS is working?

When ABS is working, you will feel the vibration of brake pedal, and hear the
noise of hydraulic controller is working. Keep step down on the pedal. At the
most situations, the brake distance for vehicle with ABS is shorter than the
vehicle without ABS, especially on icy road or wet road. Please remember to
turn steering wheel to steer clear of barrier.

6. What should do if ABS is fault?

Once ABS is fault, ABS warning light will be on. ABS will not work, but the
conventional brake system is working. So you could brake vehicle as usual way.

7. When will ABS light be on?

ABS light will be on for about 1.7s after engine starting, then turns off.
Only ABS is fault, ABS light will be on again. So once ABS light is on, go
to service station at once. Don’t try to repair ABS by yourself.

Appendix 2

How to use ABS?

Always step down brake pedal to keep enough and lasting brake force for ABS.

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