ANTI-LOCK BRAKE SYSTEM, Diagnostic DTC:C1427

DTC Code DTC Name
C1427 Motor Malfunction

DESCRIPTION

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

  • Brake actuator assembly (Ground circuit)

  • Brake actuator assembly (Motor circuit)

WIRING DIAGRAM

Refer to DTCs C0273, C0274 and C1361 Click here.

INSPECTION PROCEDURE

Note

When replacing the brake actuator assembly, perform calibration Click here.

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (MOTOR RELAY)


    1. Turn the ignition switch off

    2. Connect the intelligent tester to the DLC3.

    3. Start the engine.

    4. Turn the intelligent tester 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 The operating sound of the motor can be heard.

    6. Check for the operating sound of the motor relay when operating it with the intelligent tester.

      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 (GND2 TERMINAL)


    1. Disconnect the A6 skid control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A6-13 (GND2) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. RECONFIRM DTC

    Tech Tips

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

    The motor relay is in the brake actuator assembly.

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


    1. Turn the ignition switch off.

    2. Reconnect the skid control ECU connector.

    3. Clear the DTCs Click here.

    4. Start the engine.

    5. Drive the vehicle at a speed of 20 km/h (12 mph) or more for 30 seconds or more.

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

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

      Tech Tips


      • If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU with the ignition switch ON 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 harnesses, 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 brake actuator assembly (skid control ECU), inspect and repair the connector or wire harness. The DTCs were probably output due to a bad connection of the connector terminal.


    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here