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