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Engine Coolant Temperature Receiver Gauge Malfunction [09/2014 - ]: Procedure

  1. CHECK CAN COMMUNICATION SYSTEM 
    1. Check if CAN communication DTCs are output.

      Refer to DIAGNOSIS SYSTEM [09/2014 - 08/2016] , or refer to DIAGNOSIS SYSTEM [08/2016 - 11/2017] , or refer to DIAGNOSIS SYSTEM [11/2017 - 03/2019] , or refer to DIAGNOSIS SYSTEM [03/2019 - 09/2020] , or refer to DIAGNOSIS SYSTEM [09/2020 - 01/2023] , or refer to DIAGNOSIS SYSTEM [01/2023 - 10/2023] , or refer to DIAGNOSIS SYSTEM [10/2023 - ]

      Result

      Result Proceed to
      CAN communication DTCs are not output. A
      CAN communication DTCs are output. B

    Result: 

    B 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 11/2017]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2017 - 03/2019]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [03/2019 - 01/2023]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [01/2023 - ] 

    Result: 

    A 

    See step  2

  2. READ VALUE USING TECHSTREAM (COOLANT TEMPERATURE) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Combination Meter / Data List.
    5. Read the Data List according to the display on the Techstream.

      Body Electrical > Combination Meter > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Coolant Temperature Engine coolant temperature Min.: 0°C (0°F), Max.: 127.5°C (261.5°F) 75 to 100°C (167 to 212°F): After warming up engine -

      Body Electrical > Combination Meter > Data List 

      Tester Display
      Coolant Temperature

      OK

      Engine coolant temperature displayed on the Techstream is almost the same as the engine coolant temperature receiver gauge indication.

      HINT: 

      • When the Data List values and engine coolant temperature receiver gauge values match, a signal output malfunction of the ECM or an internal malfunction of the combination meter assembly is suspected.
      • When the Data List values and engine coolant temperature receiver gauge values do not match, an internal malfunction of the combination meter assembly is suspected.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    OK 

    See step  3

  3. CHECK FOR DTC 
    1. Check if SFI system DTCs are output.

      Refer to DTC CHECK / CLEAR [09/2014 - ]

      Powertrain > Engine > Trouble Codes 

      Result

      Result Proceed to
      SFI system DTCs are not output. A
      SFI system DTCs are output. B

    Result: 

    B 

    GO TO SFI SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - ] 

    Result: 

    A 

    See step  4

  4. READ VALUE USING TECHSTREAM (COOLANT TEMP, COOLANT TEMPERATURE) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus:
      1. for Engine: Powertrain / Engine / Data List.
      2. for Combination Meter: Body Electrical / Combination Meter / Data List.
    5. Read the Data List according to the display on the Techstream.
      1. Engine

        Powertrain > Engine > Data List 

        Tester Display Measurement Item Range Normal Condition Reference Value Diagnostic Note
        Coolant Temp Engine coolant temperature Min.: -40°C (-40°F), Max.: 140°C (284°F) 75 to 100°C (167 to 212°F): After warming up engine - This is the engine coolant temperature.
        HINT: 
        • After warming up the engine, the engine coolant temperature is 75 to 100°C (167 to 212°F).
        • After a long soak, the engine coolant temperature, intake air temperature and ambient temperature are approximately equal.
        • If the value is -40°C (-40°F), or 135°C (275°F), the sensor circuit is open or shorted.
        • Check if the engine overheats when the value indicates 135°C (275°F).

        Powertrain > Engine > Data List 

        Tester Display
        Coolant Temp
      2. Combination Meter

        Body Electrical > Combination Meter > Data List 

        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Coolant Temperature Engine coolant temperature Min.: 0°C (0°F), Max.: 127.5°C (261.5°F) 75 to 100°C (167 to 212°F): After warming up engine -

        Body Electrical > Combination Meter > Data List 

        Tester Display
        Coolant Temperature

      Result

      Result Proceed to
      Data List values of the ECUs match. A
      Data List values of the ECUs do not match. B

      HINT: 

      • When the Data List values of the ECUs match, an internal malfunction of the ECM is suspected.
      • When the Data List values of the ECUs do not match, a signal output malfunction of the ECM or an internal malfunction of the combination meter assembly is suspected.

    Result: 

    B 

    REPLACE ECM. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    A 

    See step  5

  5. REPLACE COMBINATION METER ASSEMBLY 
    1. Replace the combination meter assembly with a new or known good one.

      Refer to REMOVAL [09/2014 - ]

      OK

      The operation of the engine coolant temperature receiver gauge returns to normal.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END 

    Result: 

    NG 

    REPLACE ECM. Refer to  REMOVAL [09/2014 - ] 

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