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Chery A15 / 480 LHD model. Manual - part 71

Speed sensor

Possible Cause

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

[Description] The DTCs will appear when the

sensor has the recognizable open circuit,

short circuit and other failures.

[Hint] It may be caused due to the poor contact of

sensor, the short circuit of coil or harness,

or the failure of sensor signal processing

circuit in the ABS ECU.

· Open circuit of sensor connector
· Short circuit of sensor
· Short circuit between the sensor

connection or harness with the

counter-earth or power supply

· ABS ECU sensor signal processing

circuit failure

Check the sensor of any wheel

Normal

Abnormal

Yes

Normal

Replace ABS ECU

Remove the ABS

ECU connector, and

check whether the

resistances between

the following

terminals of ABS

ECU conform to the

standard values?

Standard value: 1.0

to 1.3 kΩ

Measure the

resistances, and, at

the same time,

swing the sensor

harness and

connector.

MK20I/E

FL: 1 to 2

FR: 19 to 20

RL: 5 to 6

RR: 22 to 23

Check the

related sensor

connector

The

failure

reoccurs or not?

Refer to the
“Repair

Details

Random

Failure”

Check

the

electrical

wirbetween the ABS ECU

and sensores

Repair the connector

Normal

ABS coding error

Possible Cause

5. The DTC is 01044

[Description] The DTC will appear when the

ECU’s software coding is inconsistent with

the hardware connection of ABS harness.

· The error connection of pin in
ABS harness
·

ABS coding error

Incorrect

Recoding (coding is 01901)

Abnormal

Repair harness

Use the diagnostic tester to check

whether the ABS ECU software

coding is correct

The correct value: Refer to the related

ABS electrical circuit diagram

Check whether the ABS harness pins

are connected

Pin connection: Refer to the related

ABS electrical circuit diagram

Supply terminal 30

Possible Cause

6. The DTC is 00668

[Description] The DTCs will appear when the

supply terminal 30# provides the

voltage or over-high voltage.

· ABS system’s fuse broken
· Too low or over-high battery voltage
· ABS electrical harness connections

damaged
· ABS ECU damaged

Abnormal

Check the ABS system’s 30# fuse

Replace the fuse

Normal

Abnormal Abnormal

Check the ABS harness connections

Repair the connections

Normal No

Retest. The abnormal reoccur?

Refer to “Repair Details

of Random Failure”

Yes

Check the battery voltage

Normal

Replace the ABS ECU

Disconnect the connection of ABS

electrical harness with the ECU,

turn the ignition switch to “ON”,

and measure the voltage between

the following terminals of ABS

electrical harness.

Terminal 8 and 9: 9.5-16.5V

Terminal 24 and 25: 9.5-16.5V

ABS operation abnormal

Possible Cause

7. The DTC is 01130

[Description] The DTC will appear when the ABS

is interfered by the

high-frequency

electromagnetic wave or when the
microprocessor believes that the
input speed signal is incredible.

·High-frequency

electromagnetic

wave interference

·Sensor damaged or sensor

electrical harness damaged

· ABS ECU damaged

No Abnormal

Check the sensor output voltage

Check sensor Replace sensor

Normal Normal

Replace ABS ECU

Check the harness between

ECU and sensor

DTC Failure Check Sheet

※Turn the ignition switch to “ON” position (the engine shuts down), and the ABS
warning lamp doesn’t light

Possible Cause

[Description] If the ABS warning lamp fails to light, it is

possible that the supply circuit of warning lamp is

open circuit, the bulb is burnt, or the warning

lamp control is damaged.

· The fuse broken
· The bulb of ABS warning lamp

fuse is broken

· The supply circuit broken
· The ABS warning lamp

controller broken

不正常

Abnormal

不正常

Abnormal

Check the ABS warning lamp’s fuse

Abnormal

in the central electrical box

Replace

Normal

Check the central electrical box fuse socket

Replace the fuse socket

Normal

Remove the ABS ECU connection

Check whether the bulb of ABS

Yes

Ignition switch: ON

warning lamp is burnt or not

Replace

The warning lamp lights?

Yes

Check the open short circuit of

Abnormal

Check the short circuit or earth of electrical

warning lamp supply circuit and

Replace the electrical harness

wire, in ABS harness, connecting with ABS

ground circuit in ABS harness

warning lamp controller and ECU

Normal

Yes

Check the connectors of warning

Abnormal Repair the connector

Replace the electrical harness

lamp supply and ground circuits

Normal No

Refer to “Repair Details

Failure reoccurs or not

of Random Failure”

Yes

※The ABS warning lamp lights after the engine starts.

Possible Cause

[Description] The possible cause may be the

ABS warning lamp controller
damaged or ABS warning lamp
circuit open circuit

· Warning lamp controller
damaged
· Short circuit of ABS warning
lamp controller
· ABS ECU damaged

Replace the warning lamp controller

Content .. 69 70 71 72 ..