VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1427

DTC Code DTC Name
C1427 Motor Malfunction

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
C1427 Actuator pump motor does not operate properly.

  • Brake actuator assembly (Ground circuit)

  • Brake actuator assembly (Motor circuit)

WIRING DIAGRAM

Refer to DTCs C1361, C146C and C146D Click here.

INSPECTION PROCEDURE

Note

When replacing the brake actuator assembly, perform zero point calibration and store system information Click here.

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (MOTOR RELAY)


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Start the engine.

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / ABS/VSC/TRC / Active Test.

      ABS/VSC/TRC
      Tester Display Test Part Control Range Diagnostic Note
      Motor Relay Motor relay Relay ON/OFF An operating sound of the motor can be heard.

    6. Check for operating sound of the motor relay when operating it using the GTS.

      Result
      Result Proceed to
      Operating sound is not heard A
      Operating sound is heard B

    B

    RECONFIRM DTC Click here

    A

  2. CHECK HARNESS AND CONNECTOR (GND TERMINAL)


    1. A01FH1RE06
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Skid Control ECU [Brake Actuator Assembly])

      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 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
      A13-1 (GND1) - Body ground Always Below 1 Ω
      A13-13 (GND2) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. RECONFIRM DTC

    Tech Tips

    This code is detected when a problem is identified in the brake actuator assembly.

    The motor relay is in the brake actuator assembly.

    Therefore, motor relay unit inspection cannot be performed. Be sure to check if the DTC is output before replacing the brake actuator assembly.


    1. Reconnect the skid control ECU (brake actuator assembly) connector.

    2. Clear the DTCs Click here.

    3. Turn the engine switch off.

    4. Start the engine.

    5. Drive the vehicle at a speed of 6 km/h (4 mph) or more.

    6. Check if the same DTC is recorded Click here.

      Result
      Result Proceed to
      DTC (C1427) is not output A
      DTC (C1427) is output B

      Tech Tips


      • If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU (brake actuator assembly) with the engine switch on (IG) and the stop light switch off, the ECU performs self diagnosis of the motor and solenoid circuits.

      • If the normal system code is output (no trouble codes are output), slightly jiggle the connectors, wire harness, and fuses of the brake actuator assembly. Make sure that no DTCs are output.

      • If any DTCs are output while jiggling a connector or wire harness of the skid control ECU (brake actuator assembly), inspect and repair the connector or wire harness.

      • It is suspected that the DTCs were output due to a bad connection of the connector terminal.


    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here