METER / GAUGE SYSTEM Engine Coolant Temperature Receiver Gauge Malfunction

DESCRIPTION

In this circuit, the combination meter assembly receives engine coolant temperature signals from the hybrid vehicle control ECU assembly via the CAN communication system. The combination meter assembly displays the engine coolant temperature that is calculated based on the data received from the hybrid vehicle control ECU assembly.

WIRING DIAGRAM

B003YHYE17
*1 Hybrid Vehicle Control ECU Assembly
*2 Combination Meter Assembly
*3 CAN Communication Line

CAUTION / NOTICE / HINT

Tech Tips


  • If there is an open or short in the engine coolant temperature sensor circuit, the ECM stores DTCs. Troubleshoot the SFI system.

    w/ EGR System: Click here

    w/o EGR System: Click here

  • Active Test cannot be performed on the engine coolant temperature receiver gauge for F SPORT models.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if CAN communication DTCs are output.

      Click here

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

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CONFIRM MODEL


    1. Confirm the vehicle type.

      Result
      Result Proceed to
      except F SPORT models A
      for F SPORT models B

    B

    GO TO STEP 4 Click here

    A

  3. PERFORM ACTIVE TEST USING GTS (WATER TEMPERATURE METER OPERATION)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Combination Meter / Active Test.

    5. Perform the Active Test according to the display on the GTS.


      Body Electrical > Combination Meter > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Water Temperature Meter Operation Engine coolant temperature receiver gauge OFF, LOW, NORMAL, HIGH -

      Body Electrical > Combination Meter > Active Test
      Tester Display
      Water Temperature Meter Operation
      OK
      Engine coolant temperature receiver gauge indication is normal.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  4. READ VALUE USING GTS (COOLANT TEMPERATURE)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Combination Meter / Data List.

    5. Read the Data List according to the display on the GTS.


      Body Electrical > Combination Meter > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Coolant Temperature Engine coolant temperature Min.: 0°C (32°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 GTS is almost the same as the engine coolant temperature receiver gauge indication.

      Tech Tips


      • When the Data List values and engine coolant temperature receiver gauge values match, a signal output error 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

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  5. CHECK FOR DTC


    1. Check if hybrid control system DTCs are output.

      Click here


      Powertrain > Hybrid Control > Trouble Codes
      Result
      Result Proceed to
      Hybrid control system DTCs are not output. A
      Hybrid control system DTCs are output. B

    B

    GO TO HYBRID CONTROL SYSTEM Click here

    A

  6. READ VALUE USING GTS (COOLANT TEMP, COOLANT TEMPERATURE)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus:


      1. for Hybrid: Powertrain / Hybrid Control / Data List.

      2. for Combination Meter: Body Electrical / Combination Meter / Data List.

    5. Check the values by referring to the table below.


      1. Hybrid Control


        Powertrain > Hybrid Control > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Engine Coolant Temp Engine coolant temperature Min.: -40°C (-40°F), Max.: 215°C (419°F)

        Cold start→Fully warmed up:

        Gradually rises

        After warming up:

        75 to 100°C (167 to 212°F)

        		 -

        Powertrain > Hybrid Control > Data List
        Tester Display
        Engine 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 (32°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

      Tech Tips


      • When the Data List values of the ECUs match, an internal malfunction of the hybrid vehicle control ECU assembly is suspected.

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


    B

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    A

  7. REPLACE COMBINATION METER ASSEMBLY


    1. Replace the combination meter assembly with a new or known good one.

      Click here

      OK
      The operation of the engine coolant temperature receiver gauge returns to normal.
      Result
      Proceed to
      OK
      NG

    OK

    END

    NG

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here