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Home >> Toyota >> 2021 >> Camry LE, FWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Vehicle Stability Control System (W/O Electric Parking Brake System) - Diagnostic Codes (3 Of 3) & Symptom Tests (Except Hybrid) >> VEHICLE STABILITY CONTROL SYSTEM (w/o Electric Parking Brake System) >> DTC C1428: Motor Circuit Malfunction [06/2017 - 10/2020] >> Procedure

DTC C1428: Motor Circuit Malfunction [06/2017 - 10/2020]: Procedure

  1. CHECK HARNESS AND CONNECTOR (+BM TERMINAL) 
    1. Make sure that there is no looseness at the locking part and the connecting part of the connector.
      GTY765307Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Skid Control ECU (Brake Actuator Assembly))

      OK

      The connector is securely connected.

    2. Disconnect the A33 skid control ECU (brake actuator assembly) connector.
    3. Check both the connector case and the terminals for deformation and corrosion.

      OK

      No deformation or corrosion.

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

      Standard Voltage

      Tester Connection Condition Specified Condition
      A33-1 (+BM) - Body ground Always 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (+BM CIRCUIT) 

    Result: 

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (GND2 TERMINAL) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY765306Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Skid Control ECU (Brake Actuator Assembly))

      Standard Resistance

      Tester Connection Condition Specified Condition
      A33-13 (GND2) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND2 CIRCUIT) 

    Result: 

    OK 

    See step  3

  3. RECONFIRM DTC 
    1. Reconnect the A33 skid control ECU (brake actuator assembly) connector.
    2. Clear the DTCs.

      Chassis > ABS/VSC/TRAC/EPB > Clear DTCs 

    3. Turn the ignition switch off.
    4. Start the engine.
    5. Perform a road test.
    6. Check if the same DTC is output.

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

      Result

      Result Proceed to
      C1428 is not output A
      C1428 is output B

    Result: 

    A 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2017 - 08/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2018 - 09/2019]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2019 - 03/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [03/2020 - 10/2020] 

    Result: 

    B 

    REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [06/2017 - 10/2020] 

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