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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Brakes >> Parking Brake System >> Electric Parking Brake System (Except HV) - Diagnostic Codes & Symptom Tests >> ELECTRIC PARKING BRAKE SYSTEM (for Gasoline Model) >> DTC C060E-19: Left Electric Parking Brake Actuator Circuit Current Above Threshold [12/2019 - ] >> Procedure

DTC C060E-19: Left Electric Parking Brake Actuator Circuit Current Above Threshold [12/2019 - ]: Procedure

  1. INSPECT NO. 2 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 uM2 and u2 No. 2 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.
      GTY909330Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of No. 2 Parking Brake Wire Assembly *b (to wire harness connector)
      *c (to Parking Brake Actuator Assembly LH) - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      uM2-1 - u2-2 (+) Always Below 1 Ω
      uM2-1 or u2-2 (+) - Body ground and other terminals Always 10 kΩ or higher
      uM2-2 - u2-1 (-) Always Below 1 Ω
      uM2-2 or u2-1 (-) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY 

    Result: 

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) - PARKING BRAKE ACTUATOR ASSEMBLY LH) 
    1. Make sure the No. 2 parking brake wire assembly is securely installed.
    2. Disconnect the A39 skid control ECU (brake actuator assembly) connector.
    3. Disconnect the u2 parking brake actuator assembly LH connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A39-3 (MRL+) - u2-2 (+) Always Below 1 Ω
      A39-3 (MRL+) or u2-2 (+) - Body ground Always 10 kΩ or higher
      A39-2 (MRL-) - u2-1 (-) Always Below 1 Ω
      A39-2 (MRL-) or u2-1 (-) - 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 LH 
    1. Remove the parking brake actuator assembly LH.

      Refer to REMOVAL [12/2019 - ]

    2. Inspect the parking brake actuator assembly LH.

      Refer to INSPECTION [12/2019 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE PARKING BRAKE ACTUATOR ASSEMBLY LH. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    OK 

    See step  4

  4. CHECK FOR SHORT TO +B 
    1. Make sure the No. 2 parking brake wire assembly is securely installed.
    2. Disconnect the u2 parking brake actuator assembly LH connector.
    3. Measure the voltage according to the value(s) in the table below.
      GTY864185Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of No. 2 Parking Brake Wire Assembly
      (to Parking Brake Actuator Assembly LH)

      Standard Voltage

      Tester Connection Condition Specified Condition
      u2-2 (+) - u2-1 (-) Electric parking brake not operating Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE PARKING BRAKE ACTUATOR ASSEMBLY LH. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    NG 

    See step  5

  5. CHECK FOR SHORT TO +B 
    1. Disconnect the uM2 No. 2 parking brake wire assembly connector.
    2. Measure the voltage according to the value(s) in the table below.
      GTY914277Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 2 Parking Brake Wire Assembly)

      Standard Voltage

      Tester Connection Condition Specified Condition
      uM2-1 - uM2-2 Electric parking brake not operating Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY 

    Result: 

    NG 

    See step  6

  6. CHECK FOR SHORT TO +B 
    1. Disconnect the uM2 No. 2 parking brake wire assembly connector.
    2. Disconnect the A39 skid control ECU (brake actuator assembly) connector.
    3. Measure the voltage according to the value(s) in the table below.
      GTY918833Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector *b (to Skid Control ECU (Brake Actuator Assembly))
      *c (to No. 2 Parking Brake Wire Assembly) - -

      Standard Voltage

      Tester Connection Condition Specified Condition
      uM2-1 or A39-3 (MRL+) - Body ground Always Below 1 V
      uM2-2 or A39-2 (MRL-) - Body ground Always Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023]  , or refer to  REMOVAL [11/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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