ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1428

DTC Code DTC Name
C1428 Motor Circuit Malfunction

DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area Note
C1428 Motor Circuit Malfunction With the motor relay and motor fail safe relay OFF, open or short in motor circuit continues for 2 seconds or more. Brake actuator assembly (Motor circuit) -

WIRING DIAGRAM

Refer to DTCs C142B , C146C and C146D.

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CAUTION / NOTICE / HINT

Note

When replacing the pump motor (brake actuator assembly), perform zero point calibration and store system information.

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PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (GND2 TERMINAL)


    1. Turn the engine switch off.

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

    3. Disconnect the A9 skid control ECU (brake actuator assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A9-1 (GND2) - 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 (GND2 CIRCUIT)