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Home >> Toyota >> 2010 >> Corolla Base, Automatic >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Vehicle Stability Control (VSC) (Diagnostic Codes (C0226-U0126) & Symptom Tests) >> Vehicle Stability Control System >> DTC C1427: Motor Malfunction >> Procedure

DTC C1427: Motor Malfunction: Procedure

  1. PERFORM ACTIVE TEST USING TECHSTREAM (ABS MOTOR RELAY) 
    1. Connect the Techstream to the DLC3.
    2. Start the engine.
    3. Select the Active Test on the Techstream. Refer to DATA LIST / ACTIVE TEST .
      ABS/VSC/TRAC

      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 for operating sound of the ABS motor relay when operating it using the Techstream.

      Result

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

    B → See step   3 

    A: Go to next step 

  2. INSPECT SKID CONTROL ECU (GND2 TERMINAL) 
    1. Turn the ignition switch off.
      Fig 1: Identifying Skid Control ECU Connector Terminals (GND2)
      GTY173127Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Make sure that there is no looseness at the locking part and the connecting part of the connector.
    3. Disconnect the skid control ECU connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A66-13 (GND2) - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (GND2 CIRCUIT) 

    OK: Go to next step 

  3. RECONFIRM DTC 

    HINT: 

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

    The ABS motor relay is in the brake actuator assembly.

    Therefore, ABS motor relay unit inspection 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. Refer to DTC CHECK / CLEAR .
    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. Refer to DTC CHECK / CLEAR .

      Result

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

      HINT: 

      • 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 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 brake actuator assembly (skid control ECU), 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 → See step   5 

    A → See step   4 

  4. CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION). Refer to  DIAGNOSIS SYSTEM 
  5. REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL 
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