VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1427

DTC Code DTC Name
C1427 Motor Malfunction

DESCRIPTION

DTC No. DTC Detection Condition Trouble Area
C1427 Actuator pump motor does not operate properly.

  • Pump motor circuit

  • Ground circuit

  • Pump motor (Brake actuator assembly)

WIRING DIAGRAM

Refer to DTCs C1361, C146C and C146D Click here.

INSPECTION PROCEDURE

Note


  • When replacing the pump motor (brake actuator assembly), perform zero point calibration Click here.

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

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (ABS MOTOR RELAY)


    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Select the Active Test using the GTS Click here.

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

    4. Check the operating sound of the pump motor when operating it using the GTS.

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

    B

    CHECK HARNESS AND CONNECTOR (GND2 TERMINAL) Click here

    A

  2. RECONFIRM DTC

    Tech Tips


    • This code is detected when a problem is identified in the skid control ECU (brake actuator assembly).

    • The ABS motor relay is in the skid control ECU (brake actuator assembly).

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


    1. Turn the engine switch off.

    2. Clear the DTCs Click here.

    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 output 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 assembly off, the ECU performs self diagnosis of the motor circuit.

      • If the normal system code is output (No trouble codes are output), slightly jiggle the connectors, wire harness, and fuses of the skid control ECU (brake actuator assembly).

      • 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.

      • If no DTCs were output when reconfirming DTCs, checking for intermittent problems is necessary because it is suspected that the original DTCs were stored due to the poor connection of a connector terminal.


    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  3. CHECK HARNESS AND CONNECTOR (GND2 TERMINAL)


    1. A01G4YLE23
      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 A40 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
      A40-13 (GND2) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND2 CIRCUIT)

    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here