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Home >> Lexus >> 2021 >> LC 500 2D Coupe >> Repair and Diagnosis >> Brakes >> Parking Brake System >> Electric Parking Brake System - Diagnostic Codes & Symptom Tests (Coupe) >> Electric Parking Brake System >> DTC C13A6/42: Open or Short in Circuit of Motor [03/2017 - 09/2018] >> Procedure

DTC C13A6/42: Open or Short in Circuit of Motor [03/2017 - 09/2018]: Procedure

  1. CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU ASSEMBLY - PARKING BRAKE WITH BRACKET ACTUATOR ASSEMBLY) 
    1. Turn the engine switch off.
    2. Disconnect the X66 parking brake ECU assembly connector.
    3. Disconnect the X68 parking brake with bracket actuator assembly connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      X66-1 (M-) - X68-7 (M-) Always Below 1 Ω
      X66-1 (M-) or X68-7 (M-) - Body ground Always 10 kΩ or higher
      X66-2 (M+) - X68-8 (M+) Always Below 1 Ω
      X66-2 (M+) or X68-8 (M+) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  2

  2. CHECK PARKING BRAKE WITH BRACKET ACTUATOR ASSEMBLY (PARKING BRAKE MOTOR) 
    1. Turn the engine switch off.
    2. Disconnect the X68 parking brake with bracket actuator assembly connector.
      GTY653600Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Parking Brake with Bracket Actuator Assembly)
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      7 (M-) - 8 (M+) Always Below 4 Ω
      7 (M-) - Body ground Always 10 kΩ or higher
      8 (M+) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE PARKING BRAKE ECU ASSEMBLY. Refer to  REMOVAL [03/2017 - 05/2023] 

    Result: 

    NG 

    REPLACE PARKING BRAKE WITH BRACKET ACTUATOR ASSEMBLY. Refer to  REMOVAL [03/2017 - 05/2023]