Chery A15 / 480 LHD model. Instruction - page 70

DTC Failure Check Sheet Index

Condition of Failure
Turn the ignition switch to “ON” (under the engine shut down), and the ABS
warning lamp doesn’t light
The warning lamp doesn't extinguish after the engine starts

Uneven braking force at both sides
Braking force shortage
ABS fails to operate when slightly stepping on the brake
pedal (the vehicle is in stationary state)

ABS operates when slightly stepping on the brake pedal
(the vehicle is in driving state)

Abnormal ABS

operation

The brake pedal vibrates seriously when the ABS works

Too long brake pedal travel
Great force required to step on the brake pedal

Without DTC output (fail to communicate with the diagnostic tester)

DTC FAILURE CHECK SHEET

ABS hydraulic pump

Possible Cause

1. The DTC is 01276

[Description] The ABS ECU will monitor the motor failure to

operate normally, and then record this DTC when the

vehicle speed exceeds 20 km/h.

[Hint] The occurrence of this DTC may be caused due to the

disconnection of harness between the motor and ECU.

Use the hydraulic unit function of the diagnostic tester

to test or drive the motor and take this testing.


· Power supply broken

circuit or earth
· Motor harness uncoupling
· Motor damaged

Caution: If the battery discharges excessively, the motor will fails to be driven, and thus we

shall confirm firstly whether the battery voltage is normal before the motor drive
testing is conducted, and the vehicle shall be in stationary state when the motor drive
testing is conducting.

Abnormal

Replace the hydraulic control unit

Normal

Abnormal

Replace the fuse or harness

Normal

Replace the electronic control unit

No

Refer to the “Repair Details

of Random Failure

Pull out the harness
connector the motor,
directly connect the battery
supply to the battery
terminals and check whether
the motor operate normally.

Check the fuses and ABS

ECU connections

Connect the motor harness

Turn the ignition switch to “ON”

Clear the DTC

Use the diagnostic tester to conduct the

hydraulic control unit diagnosis

WHEEL SPEED SENSORS: 00283, 00285, 00290, 00287

Possible Cause

2. The DTCs are 00283, 00285, 00290, 00287
[Description] The DTCs will appear when the

open circuit can't be detected and
there is no signal output yet if the
vehicle speed reaches 20 km/h or
more.

[Hint] It may be caused due to the sensor

neglected to be installed, sensor coil
or harness short-circuited, excessive
clearance between the sensor and
gear ring, or the gear damaged. The
foreign materials between the wheel
speed sensor and gear ring may cause
the clearance undersized.

· Sensor neglected to be installed
· Sensor coil or harness short
circuited
· Excessive air clearance between

the sensor and gear ring

· Gear ring neglected to be

installed

· ABS ECU failure

Whether the failure reoccurs or not

Yes

Install it normally

Yes

Abnormal


Normal

Replace the ABS ECU

Sensor is installed

normally or not?

Check all sensor gear

rings

Check the wheel

bearing clearance

Check every sensor

Check the harness between

the sensor and ABS ECU

Abnormal

Abnormal

Repair or replace

No

Replace

Check the sensor’s output voltage

at the ABS pin 25# plug

Replace

Abnormal

Speed sensor

Possible Cause

3. The DTCs are 00283, 00285, 00290, 00287

[Description] When the vehicle speed > 20 km/h, the

DTCs will appear if the sensor signal exceeds

the tolerance range.

[Hint] It is very possible that the too feeble signals from

sensor are caused due to the intermittent poor

contact or short circuit between sensor coil or

harness, the gear ring damaged, or the excessive

air clearance between the sensor and gear ring.

· Poor contact or short circuit

between the sensor coil or

harness

· Excessive or undersized air

clearance between the sensor

and gear ring

· Gear ring damaged
· ABS ECU failure

Abnormal

Install it normally


Correct

Abnormal

Check the sensor output voltage at

ABS pin 25# plug

Replace the ABS ECU

Normal

Check wheel bearing

clearance

Check the harness between the

sensor and ABS ECU

Sensor is installed

normally or not?

Check all sensor gear

rings

Check all wheel sensor gear

rings

Replace

Replace

Repair or replace

Abnormal

Abnormal

Abnormal

Normal

Normal

Normal

Рассказать друзьям