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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 247 (Engine Control System (A25A-FXS) - Diagnostic Codes (14 Of 20)) >> SFI System >> DTC P111C-62: Control Module Internal Temperature Sensor/Intake Air Temperature Sensor Signal Compare Failure [08/2021 - ] >> Procedure

DTC P111C-62: Control Module Internal Temperature Sensor/Intake Air Temperature Sensor Signal Compare Failure [08/2021 - ]: Procedure

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  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P111C-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 P111C-62 is output A
      DTC P111C-62 and other DTCs are output B

      HINT: 

      If any DTCs other than P111C-62 are output, troubleshoot those DTCs first.

    Result: 

    B 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2021 - 09/2022]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2022 - ] 

    Result: 

    A 

    See step  2

  2. CHECK FREEZE FRAME DATA (INTAKE AIR TEMPERATURE AND AMBIENT 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(P111C-62) > Freeze Frame Data 

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

      Standard

      Difference between the Intake Air Temperature and the Ambient 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 mass air flow meter sub-assembly.

        Refer to INITIALIZATION [08/2021 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY. Refer to  REMOVAL [06/2018 - ] 

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