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Chery S11 / Chery QQ. Manual - part 32

Chery QQ Service 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

Chery QQ Service Manual Chassis System

Abnormal

Replace HECU

Normal

Abnormal Replace fuse or harness

Normal

Replace ECU

No

2、Wheel speed sensor：00283，00285，00290，00287

Remove motor harness
plug and connect battery
to motor plug to see if
motor works

Check fuse and ABS ECU
connector

Connect motor harness
Turn on ignition switch
Clear DTC

Diagnose HECU with instrument

Possible cause

2、DTC 00283，00285，00290，00287

Means no signal put out at 20km/h

Hint: No sensor, sensor coil and harness

short, too big or too small for clearance

between sensor and tooth ring or bad tooth

ring

No sensor

Sensor coil and harness short

Too big or too small for

clearance between sensor and

tooth ring

Bad tooth ring

ABS ECU fault

Faulty appears again?

Yes

Refer to intermittence malfunction

Chery QQ Service Manual Chassis System

Reinstallation

Yes

Abnormal

Normal

3、Wheel speed sensor

Possible cause

3、DTC 00283，00285，00290，00287
Means signal is over specification at 20km/h
Hint: Short sensor coil, tooth ring damage
or too big clearance.

Bad touch or short between coil
and harness
Too big or small for clearance
between sensor and tooth ring
Bad tooth
ABS ECU fault

Reinstallation

Abnormal

Normal

Replace ABS ECU

Normal

Sensor install
normal?

Abnormal

Check each tooth ring

Check clearance

Check each sensor

Check harness between
sensor and ABS ECU

Install sensor
normal?

Check out put voltage

on ABS pin 25

Check each tooth

ring

Check each tooth ring

Check clearance

Replace

Fix or replace

Abnormal

Fix or replace

Abnormal

Check out put voltage on
ABS pin 25

Replace

Normal

Abnormal

Replace

Normal

Abnormal

Normal

Abnormal

Replace ABS

Check harness between
sensor and ABS ECU

Chery QQ Service Manual Chassis System

4、Wheel speed sensor

Possible fault

4、DTC 00283，00285，00290，00287
Means open or short sensor
Hint:Bad contact of sensor or short harness
or circuit fault on ABS ECU

Open sensor coil
Short sensor coil
Short between sensor and harness or
source
ABS ECU signal fault

Check each sensor

Normal

Abnormal

Yes

Check harness between
ECU and sensor

Normal

Remove ABS ECU
connector and mea-
sure

resistance

between terminals
of ABS ECU
Specifications ：
1.0～1.3kΩ
Shake harness or
connector
MK20I/E
Front left：1-2
Front right：19-20
Rear left：5-6
Rear right：22-23

Check connector of
sensor

Fault

appears

again?

Refer

service hint

Normal

Fix connecter

Replace ABS ECU

5、ABS coding err

Possible cause

5、DTC 01044

Means the software and hardware problem

·Bad connect of ABS harness

·ABS ECU coding fault

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