Chery A series. Manual - part 85

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

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Abnormal

Abnormal

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?

                                                                                            No

                          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

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Caution: This failure mode is available only when the system can communicate with

the diagnostic instrument (ABS ECU power supply normal) and there is no
DTC.

Check the open circuit of wires between

          Yes

  ECU and ABS warning lamp controller

                          Replace  harness

No                Abnormal

Check the ABS warning lamp controller

                      Replace

Normal

Replace the ABS ECU

ABS operation abnormal

       Possible Cause

[Description] This problem is related closely to

the driver and road conditions, and
thus it is difficult to diagnose this
failure. However, if there is no DTC
memory, the following checks may be
conducted.

*    Improper installation of
sensor
*    Sensor harness problem
*    Sensor damaged
*    Gear ring damaged
*    Sensor adhered with
foreign material
*    Wheel bearing damaged
*    ABS HCU (Hydraulic
Control Unit) damaged
*    ABS ECU (Electronic
Control Unit) damaged

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