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Home >> Lexus >> 2021 >> UX 250h Luxury >> Repair and Diagnosis >> Brakes >> Parking Brake System >> Electric Parking Brake System (Diagnostic Codes & Circuit Tests) (Hybrid) >> 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. Turn the power switch off.
    2. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

      OK

      The connector is securely connected.

    3. Disconnect the jN2 and j2 No. 1 parking brake wire assembly connectors.
    4. Check both the connector case and the terminals for deformation and corrosion.

      OK

      No deformation or corrosion.

    5. Measure the resistance according to the value(s) in the table below.
      GTY1086191Courtesy 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
      jN2-1 - j2-2 (+) Always Below 1 Ω
      jN2-1 or j2-2 (+) - Body ground and other terminals Always 10 kΩ or higher
      jN2-2 - j2-1 (-) Always Below 1 Ω
      jN2-2 or j2-1 (-) - 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. Turn the power switch off.
    2. Make sure the No. 1 parking brake wire assembly is securely installed.
    3. Disconnect the A48 parking brake ECU (brake actuator assembly) connector.
    4. Disconnect the j2 parking brake actuator assembly RH connector.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A48-4 (MRR+) - j2-2 (+) Always Below 1 Ω
      A48-4 (MRR+) or j2-2 (+) - Body ground Always 10 kΩ or higher
      A48-3 (MRR-) - j2-1 (-) Always Below 1 Ω
      A48-3 (MRR-) or j2-1 (-) - 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 [10/2018 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE PARKING BRAKE ACTUATOR ASSEMBLY RH. Refer to  REMOVAL [10/2018 - ] 

    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 j2 parking brake actuator assembly RH connector.
    4. Measure the voltage according to the value(s) in the table below.
      GTY1087237Courtesy 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
      j2-2 (+) - j2-1 (-) Electric parking brake not operating Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE PARKING BRAKE ACTUATOR ASSEMBLY RH. Refer to  REMOVAL [10/2018 - ] 

    Result: 

    NG 

    See step  5

  5. CHECK FOR SHORT TO +B 
    1. Disconnect the jN2 No. 1 parking brake wire assembly connector.
    2. Measure the voltage according to the value(s) in the table below.
      GTY1086407Courtesy 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
      jN2-1 - jN2-2 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 jN2 No. 1 parking brake wire assembly connector.
    2. Disconnect the A48 parking brake ECU (brake actuator assembly) connector.
    3. Measure the voltage according to the value(s) in the table below.
      GTY1086481Courtesy 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
      jN2-1 or A48-4 (MRR+) - Body ground Always Below 1 V
      jN2-2 or A48-3 (MRR-) - Body ground Always Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [10/2018 - 07/2022]  , or refer to  REMOVAL [07/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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