METER / GAUGE SYSTEM Engine Coolant Temperature Receiver Gauge Malfunction

DESCRIPTION

In this circuit, the meter CPU receives engine coolant temperature signals from the ECM using the CAN communication system. The meter CPU displays engine coolant temperature that is calculated based on the data received from the ECM.

WIRING DIAGRAM

A01ELFZE60

INSPECTION PROCEDURE

Tech Tips

If there is an open or short in the engine coolant temperature sensor circuit, the ECM stores the DTCs. Refer to troubleshoot SFI System Click here.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if a CAN communication DTC is output Click here.

      Result
      Result Proceed to
      CAN communication DTC is not output. A
      CAN communication DTC is output. B

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

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


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

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

      Combination Meter
      Tester Display Test Part Control Range Diagnostic Note
      Water Temperature Meter Operation Engine coolant temperature receiver gauge Low, Normal, High Confirm that the vehicle is stopped with the engine idling
      OK
      Engine coolant temperature receiver gauge indication is normal.

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  3. READ VALUE USING GTS (COOLANT TEMPERATURE)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

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

      Combination Meter
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Coolant Temperature Engine coolant temperature/0 to 140°C (-40 to 284°F) After warming up: 75 to 100°C (167 to 212°F) -
      OK
      Engine coolant temperature value displayed on the GTS is almost the same as engine coolant temperature receiver gauge indication.

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  4. READ VALUE USING GTS (COOLANT TEMP)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List.

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

      Engine and ECT
      Tester Display Measurement Item/Range Normal Condition 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

      If the value is -40°C (-40°F), the sensor circuit is open.

      If the value is 140°C (284°F), the sensor circuit is shorted.
      OK
      Engine coolant temperature value displayed on the GTS is almost the same as the GTS indication (Body Electrical / Combination Meter / Data List).

    NG

    REPLACE ECM Click here

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here