ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1428

DTC Code DTC Name
C1428 Motor Circuit

DESCRIPTION

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1428 Motor Circuit

611

1160

  • INF Code: 611


    • An open or short in the ABS motor circuit is detected for 2 seconds or more.

  • INF Code: 1160


    • The ABS motor voltage is 18.5 V or more for 0.2 seconds or more.

 Brake actuator assembly ABS DTC

WIRING DIAGRAM

Refer to DTC C1427.

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CAUTION / NOTICE / HINT

Note

After replacing the brake actuator assembly, perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".

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PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)


    1. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

      OK
      The connector is securely connected.

    2. Disconnect the A32 skid control ECU (brake booster with master cylinder assembly) connector.

    3. Disconnect the A33 brake actuator assembly connector (for LHD).

    4. Disconnect the A34 brake actuator assembly connector (for RHD).

    5. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      A32-40 (+BM) - A33-13 (+BM) Always Below 1 Ω
      A32-40 (+BM) or A33-13 (+BM) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      A32-40 (+BM) - A34-13 (+BM) Always Below 1 Ω
      A32-40 (+BM) or A34-13 (+BM) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (GND TERMINAL)


    1. A003N4YC15
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Brake Actuator Assembly)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      A33-1 (MGND) - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      A34-1 (MGND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY for LHD: Click here
    REPLACE BRAKE ACTUATOR ASSEMBLY for RHD: Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)