Chery S11 / Chery QQ. Manual — part 189

Chery QQ Maintenance 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 accordintg to hap malfunction

diagnosis

Repair as Malfunction DTC check table

Clear DTC

Key switch off，removal tester

End

On road check

DTC

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Chery QQ Maintenance 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 tuitable 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 Maintenance 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-IIconnector 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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Chery QQ Maintenance Manual Chassis System

Troubleshooting table index

（1）Troubleshooting table index

DTC

Symptom

Diagnosis

65535

ECU

Damage

01276

ABS Hydraulic pump

Motor does not work

00283

Front left sensor

00285

Front right sensor

00290

Rear left sensor

00287

Rear right sensor

Electric or mechanic
faults

01044

ABS Code Fault

00668

Source terminal 30

01130

ABS abnormal

Bad signal

（2） Non-DTC malfunction table index

Symptom
Turn on ignition switch, ABS light not up
Start engine but warning light not turn off

Uneven brake torque on both sides
Brake torque not enough
Step on pedal, ABS works ( vehicle is stopping)
Step on pedal, ABS works ( vehicle is running)

ABS abnormal

Pedal shocks badly when ABS works

Too long for brake travel
Need too much force to step on pedal
No DTC put out ( cannot communicate with diagnosis instrument)

七、Troubleshooting table

1、ABS Hydraulic pump

Possible cause

1、DTC 01276
It means ABS ECU find that motor cannot work
normally at 20km/h
Hint: Harness between motor and ECU is loose.
Test with diagnosis instrument.

Source open or ground
Motor harness loose
Motor damage

Attention: Vehicle must be in idle state when proceeding electric motor drive

test

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