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Home >> Toyota >> 2021 >> Mirai Limited >> Repair and Diagnosis >> Brakes >> Parking Brake System >> Electric Parking Brake System - Diagnostic Codes & Symptom Tests >> Electric Parking Brake System >> DTC C112A-62: Electric Parking Brake Tension Sensor "A/B" Correlation Signal Compare Failure [11/2020 - ] >> Procedure

DTC C112A-62: Electric Parking Brake Tension Sensor "A/B" Correlation Signal Compare Failure [11/2020 - ]: Procedure

  1. CHECK HARNESS AND CONNECTOR (NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) - PARKING BRAKE ACTUATOR ASSEMBLY WITH BRACKET) 

    Pre-procedure1

    • Turn the ignition switch off.
    • Disconnect the A6 No. 2 skid control ECU (brake actuator assembly) connector.
    • Disconnect the G71 parking brake actuator assembly with bracket connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      A6-8 (TSEN) - G71-5 (TSEN) Always Below 1 Ω Ω
      A6-40 (TSN2) - G71-10 (TSN2) Always Below 1 Ω Ω
      A6-42 (TGND) - G71-1 (TGND) Always Below 1 Ω Ω
      A6-8 (TSEN) or G71-5 (TSEN) - Body ground Always 10 kΩ or higher kΩ
      A6-40 (TSN2) or G71-10 (TSN2) - Body ground Always 10 kΩ or higher kΩ
      A6-42 (TGND) or G71-1 (TGND) - Body ground Always 10 kΩ or higher kΩ

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  2

  2. INSPECT PARKING BRAKE ACTUATOR ASSEMBLY WITH BRACKET (TENSION SENSOR) 

    Pre-procedure1

    • Turn the ignition switch to ON.
    • Measure the voltage according to the value(s) in the table below.
      GTY979512Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Parking Brake Actuator Assembly with Bracket)

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      G71-1 (TGND) - G71-5 (TSEN) Ignition switch ON 0.35 to 4.5 V V
      G71-1 (TGND) - G71-10 (TSN2) Ignition switch ON 0.35 to 4.5 V V

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None

    Result: 

    OK 

    REPLACE NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [11/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 12/2022]  , or refer to  REMOVAL [12/2022 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPLACE PARKING BRAKE ACTUATOR ASSEMBLY WITH BRACKET. Refer to  REMOVAL [11/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 12/2022]  , or refer to  REMOVAL [12/2022 - 12/2023]  , or refer to  REMOVAL [12/2023 - ]