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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (Engine Control System (A25A-FXS) - Diagnostic Codes (03 Of 20)) >> SFI System >> DTC P00B1-62: Radiator Coolant Temperature Sensor Signal Compare Failure [08/2020 - 08/2021] >> Procedure

DTC P00B1-62: Radiator Coolant Temperature Sensor Signal Compare Failure [08/2020 - 08/2021]: Procedure

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  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P00B1-62) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Trouble Codes.
    5. Read the DTCs and record the Freeze Frame Data.

      Powertrain > Engine > Trouble Codes 

      Result

      Result Proceed to
      DTC P00B1-62 is output A
      DTC P00B1-62 and other DTCs are output B

      HINT: 

      If any DTCs other than P00B1-62 are output, troubleshoot those DTCs first.

    Result: 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2020 - 08/2021] 

    Result: 

    See step  2

  2. CHECK FREEZE FRAME DATA (COOLANT TEMPERATURE AND RADIATOR COOLANT TEMPERATURE) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Using the Techstream, read the values displayed in the freeze frame data recorded in step 1.

      Powertrain > Engine > DTC(P00B1-62) > Freeze Frame Data 

      Tester Display
      Coolant Temperature
      Radiator Coolant Temperature
    5. Read the value displayed on the Techstream.

      Standard

      Difference between the Coolant Temperature and the Radiator Coolant Temperature is within 15°C (27°F).

      HINT: 

      When the engine is cold, the value of the intake air temperature, ECM internal temperature and ambient temperature should be approximately the same.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE NO. 2 ENGINE COOLANT TEMPERATURE SENSOR. Refer to  REMOVAL [08/2020 - 08/2021] 

    Result: 

    OK 

    See step  3

  3. CHECK FREEZE FRAME DATA (COOLANT TEMPERATURE AND INTAKE AIR TEMPERATURE) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Using the Techstream, read the values displayed in the Freeze Frame Data recorded in step 1.

      Powertrain > Engine > DTC(P00B1-62) > Freeze Frame Data 

      Tester Display
      Coolant Temperature
      Intake Air Temperature
    5. Read the value displayed on the Techstream.

      Standard

      Difference between the Coolant Temperature and the Intake Air Temperature is within 15°C (27°F).

      HINT: 

      • When the engine is cold, the value of the intake air temperature, ECM internal temperature and ambient temperature should be approximately the same.
      • Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.

        Refer to INITIALIZATION [08/2020 - 08/2021]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [08/2020 - 08/2021] 

    Result: 

    NG 

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR. Refer to  REMOVAL [08/2020 - 08/2021]