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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 224 (Engine Control System (A25A-FXS) - Diagnostic Codes (04 Of 20)) >> SFI System >> DTC P0115-15: Engine Coolant Temperature Sensor 1 Circuit Short to Battery or Open [06/2018 - 08/2020] >> Procedure

DTC P0115-15: Engine Coolant Temperature Sensor 1 Circuit Short to Battery or Open [06/2018 - 08/2020]: Procedure

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  1. READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS) 
    GTY826989Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 Engine Coolant Temperature Sensor *2 ECM
    *a Front view of wire harness connector
    (to Engine Coolant Temperature Sensor)    		 - -
    1. Disconnect the engine coolant temperature sensor connector.
    2. Connect terminals 1 and 2 of the engine coolant temperature sensor connector on the wire harness side.
    3. Connect the Techstream to the DLC3.
    4. Turn the power switch on (IG).
    5. Turn the Techstream on.
    6. Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature.

      Powertrain > Engine > Data List 

      Tester Display
      Coolant Temperature
    7. According to the display on the Techstream, read the Data List.

      OK

      Techstream Display Specified Condition
      Coolant Temperature Higher than 135°C (275°F)

      HINT: 

      Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.

      Refer to INITIALIZATION [06/2018 - 07/2019] , or refer to INITIALIZATION [07/2019 - 08/2020]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to  REMOVAL [06/2018 - 08/2020] 

    Result: 

    NG 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM) 
    1. Disconnect the engine coolant temperature sensor connector.
    2. Disconnect the ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C67-2 - C88-125 (THW) Always Below 1 Ω
      C67-1 - C88-124 (ETHW) Always Below 1 Ω
      C67-2 or C88-125 (THW) - Other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [06/2018 - 08/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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