VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1427

DTC Code DTC Name
C1427 Motor Malfunction

DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area Note
C1427 Motor Malfunction Actuator pump motor does not operate properly.
  • Brake actuator assembly (ground circuit)

  • Brake actuator assembly (motor circuit)

  • Wire harness or connector

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WIRING DIAGRAM

Refer to DTCs C142B, C146C and C146D.

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CAUTION / NOTICE / HINT

Note


  • When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information.

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  • Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (MOTOR RELAY)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Select the Active Test using the GTS.

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      Chassis > ABS/VSC/TRC/EPB > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Motor Relay Motor relay Relay ON/OFF

      Operating sound of motor can be heard.

      Vehicle condition: Vehicle stopped


      Chassis > ABS/VSC/TRC/EPB > Active Test
      Tester Display
      Motor Relay
    5. Check the operating sound of the motor relay when operating it with the GTS.

      Result
      Result Proceed to
      The operating sound is not heard. A
      The operating sound is heard. B

    B
    A
  2. 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 A41 skid control ECU (brake actuator assembly) connector.

    4. B007YYAC19
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A41-30 (GND2) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG
    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 A41 skid control ECU (brake actuator assembly) connector.

    2. Clear the DTCs.

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      Chassis > ABS/VSC/TRC/EPB > Clear DTCs
    3. Turn the engine switch off.

    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 recorded.

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      Chassis > ABS/VSC/TRC/EPB > Trouble Codes

      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 DTCs 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.

      • The DTCs were probably output due to a bad connection of the connector terminal.

      • If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts.

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      Result
      Result Proceed to
      DTC C1427 is not output. A
      DTC C1427 is output. B

    A
    B