VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1427

DTC Code DTC Name
C1427 Motor Malfunction

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1427

Motor Malfunction

Actuator pump motor does not operate properly.

  • Brake actuator assembly (Ground circuit)

  • 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 skid control ECU (brake actuator assembly), perform zero point calibration.

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PROCEDURE

  1. PERFORM ACTIVE TEST USING GTS (MOTOR RELAY)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. According to the display on the GTS, perform the Active Test.

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

    Chassis > ABS/VSC/TRC > 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 > Active Test

    Tester Display

    Motor Relay

    Result

    Proceed to

    The operating sound is not heard

    The operating sound is heard
    The operating sound is heard

    RECONFIRM DTCClick here

    The operating sound is not heard

  2. CHECK HARNESS AND CONNECTOR (GND2 TERMINAL)

    1. Turn the ignition switch off.

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

    3. Disconnect the A100 skid control ECU (brake actuator assembly) connector.

    4. C342353C88

      *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

      A100-1 (GND2) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND2 CIRCUIT)

    OK

  3. RECONFIRM DTC

    Tip:

    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 A100 skid control ECU (brake actuator assembly) connector.

    2. Clear the DTCs.

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    3. Turn the ignition 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 > Clear DTCs

    Chassis > ABS/VSC/TRC > Trouble Codes

    Tip:

    • If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU (brake actuator assembly) 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 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.

    Result

    Proceed to

    DTC C1427 is not output

    DTC C1427 is output
    DTC C1427 is not output

    USE SIMULATION METHOD TO CHECK

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    DTC C1427 is output

    REPLACE BRAKE ACTUATOR ASSEMBLY

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