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Home >> Lexus >> 2021 >> ES 300h Luxury >> Repair and Diagnosis >> Brakes >> Parking Brake System >> Electric Parking Brake System (Hybrid) - Diagnostic Codes & Symptom Tests >> ELECTRIC PARKING BRAKE SYSTEM (for HV Model) >> DTC C0613-19: Right Electric Parking Brake Actuator Circuit Current Above Threshold [08/2021 - ] >> Procedure

DTC C0613-19: Right Electric Parking Brake Actuator Circuit Current Above Threshold [08/2021 - ]: Procedure

  1. INSPECT NO. 1 PARKING BRAKE WIRE ASSEMBLY 
    1. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

      OK

      The connector is securely connected.

    2. Disconnect the bN3 and b1 No. 1 parking brake wire assembly connectors.
    3. Check both the connector case and the terminals for deformation and corrosion.

      OK

      No deformation or corrosion.

    4. Measure the resistance according to the value(s) in the table below.
      GTY1086265Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of No. 1 Parking Brake Wire Assembly *b (to wire harness connector)
      *c (to Parking Brake Actuator Assembly RH) - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      bN3-2 - b1-2 (RE+) Always Below 1 Ω
      bN3-2 or b1-2 (RE+) - Body ground and other terminals Always 10 kΩ or higher
      bN3-1 - b1-1 (RE-) Always Below 1 Ω
      bN3-1 or b1-1 (RE-) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY 

    Result: 

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY) - PARKING BRAKE ACTUATOR ASSEMBLY RH) 
    1. Make sure the No. 1 parking brake wire assembly is securely installed.
    2. Disconnect the A54 parking brake ECU (brake actuator assembly) connector.
    3. Disconnect the b1 parking brake actuator assembly RH connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A54-4 (MRR+) - b1-2 (RE+) Always Below 1 Ω
      A54-4 (MRR+) or b1-2 (RE+) - Body ground Always 10 kΩ or higher
      A54-3 (MRR-) - b1-1 (RE-) Always Below 1 Ω
      A54-3 (MRR-) or b1-1 (RE-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

  3. INSPECT PARKING BRAKE ACTUATOR ASSEMBLY RH 

    Refer to INSPECTION [06/2018 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE PARKING BRAKE ACTUATOR ASSEMBLY RH. Refer to  REMOVAL [06/2018 - ] 

    Result: 

    OK 

    See step  4

  4. CHECK FOR SHORT TO +B 
    1. Turn the power switch off.
    2. Make sure the No. 1 parking brake wire assembly is securely installed.
    3. Disconnect the b1 parking brake actuator assembly RH connector.
    4. Measure the voltage according to the value(s) in the table below.
      GTY1087105Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of No. 1 Parking Brake Wire Assembly
      (to Parking Brake Actuator Assembly RH)

      Standard Voltage

      Tester Connection Condition Specified Condition
      b1-2 (RE+) - b1-1 (RE-) Electric parking brake not operating Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE PARKING BRAKE ACTUATOR ASSEMBLY RH. Refer to  REMOVAL [06/2018 - ] 

    Result: 

    NG 

    See step  5

  5. CHECK FOR SHORT TO +B 
    1. Disconnect the bN3 No. 1 parking brake wire assembly connector.
    2. Measure the voltage according to the value(s) in the table below.
      GTY1086595Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 1 Parking Brake Wire Assembly)

      Standard Voltage

      Tester Connection Condition Specified Condition
      bN3-2 - bN3-1 Electric parking brake not operating Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY 

    Result: 

    NG 

    See step  6

  6. CHECK FOR SHORT TO +B 
    1. Disconnect the bN3 No. 1 parking brake wire assembly connector.
    2. Disconnect the A54 parking brake ECU (brake actuator assembly) connector.
    3. Measure the voltage according to the value(s) in the table below.
      GTY1087076Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector *b (to Parking Brake ECU (Brake Actuator Assembly))
      *c (to No. 1 Parking Brake Wire Assembly) - -

      Standard Voltage

      Tester Connection Condition Specified Condition
      bN3-2 or A54-4 (MRR+) - Body ground Always Below 1 V
      bN3-1 or A54-3 (MRR-) - Body ground Always Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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