Chery S11 / Chery QQ. Manual — part 31

Chery QQ Service Manual Chassis System

Steps of installation

air.

1. Install a new seal ring on groove
and make sure there are no any bends on
rings.

2. Put lubricated cover on piston.
3. Clean piston with fluid.
4. Install piston and cover in
cylinder. Push the piston to the bottom
of pump.
5. Install cover in the hole of
cylinder.
6. Install valve and valve cover on
cylinder.
Fixture
Screw the valve to 8N.m.

7. Install cylinder.

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Chery QQ Service Manual Chassis System

Section four ABS controller

I、Fault diagnosis flow chart

Start

No

Yes

Abnormal

Normal

Tester linkage

Key switch to“ON”

Open

tester switch, ,select “QQseries”

Select “MK20-I/E type ABS system”

Select “Versatile OBD-16 diagnosis socket”

Whether able to communicating

Non- DTC

check

table repair

Hap malfunction

Lasting malfunction

Record DTC

Clear DTC

Repair according to hap malfunction

diagnosis

Repair as Malfunction DTC check table

Clear DTC

End

On road check

DTC

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Chery QQ Service Manual Chassis System

II、Fault diagnosis Points of attention

ABS applies electronic hydraulic control system. The phenomenon in table below

is not malfunction during system normal operation.

Symptom

Explain

System self diagnose sound

Knocking sound appears when engine
starts. It’s normal for system self
diagnose sound

ABS working sound

1. Sound in ABS HECU motor.
2. Pedal vibration sound
3. Sound from suspension knock or

tire touch with ground

Attention: When ABS works normally,
tire still has sound.

Brake distance is long during ABS

works

The braking distance of ABS vehicle is
longer than NON-ABS vehicle on snow or
sand road.

III、The operation and the function

（1） Connect tester and diagnosis socket when power is off, turn on ignition
switch
（2） Turn on tester power supply and select“Wind Cloud Series”
（3） Select“MK20-I/E type ABS system”
（4） Select correct diagnosis socket
（5） Select suitable function item
(For ABS circuit control please refer S11 electronics service manual)

四、Service hints for intermittence malfunction

The intermittence malfunction appears because the bad contact in circuit and

input/output signal points. Check the intermittence malfunction according to DTC
table. Sometimes the intermittence malfunction will disappear automatically. So
it’s not easy to find the problem.
Check the intermittence malfunction would appear again with following simulation.
1. If the vibration is main cause:
. Shake gently the connector left, right, up and down.
. Shake gently the harness left, right, up and down.
. Shake gently the sensor left, right, up and down.

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Chery QQ Service Manual Chassis System

. Shake gently other parts such as bearing left, right, up and down.

Attention: Replace new parts, especially the sensor, if harness is broken.
2. If over heat or over cold is main cause:
. Heat the parts with hair drier.
. Spray cold fog to check any cold weld.
3. If the contact resistance of source is too big:
. Turn on all appliance switches including headlamp and rear defogger switch.
Wait for another intermittence malfunction appears.

五、MK 20 ABS system

（1）、Check ABS warning light
Check if ABS light is on as follows:
1、Turn on ignition switch, the light will be on for 1.7s, then turn off.
2、It will be fault if not as above mentioned. Please check DTC.
3、If the light does not on at all, please refer non-DTC check table.
（2）、Read signal
Connect diagnosis instrument with the OBD-II connector near pedal. Turn on
instrument and read signal from ABS ECU.
1、For example, the version and part number of ABS ECU.
S11-3550010
2、Coding（Coding）：01901
（3）、Reading DTC
Enter “ABS for MK20-I/E”, select DTC and push CONFIRM key. DTC will be displayed
on the screen.
（4）、Clear DTC
1） Push CLEAR after reading DTC.
2） The screen will display.

3） Push YES. If the trouble is cleared, DTC will be cleared completely.

（5）DTC display mode

System problem display code

The display code

Non-DTC

Never happened

Non-DTC

At present no

problem

Happened before

Hap DTC

Never happened

Non-hap DTC

Problem still

exists

Happened before

Hap DTC and non-hap DTC

Want clear DTC ?

[Yes]：Delete（key on，engine off）

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