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 and BEAN lines. The meter CPU displays engine coolant temperature that is calculated based on the data received from the ECM.

WIRING DIAGRAM

A015YGSE01

INSPECTION PROCEDURE

Tech Tips

If there is an open or short in the engine coolant temperature sensor circuit, the ECM will store the DTCs. Perform troubleshooting of the "SFI System" Click here (for 2UR-GSE)).

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


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

      Result
      Condition 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. CHECK MULTIPLEX COMMUNICATION SYSTEM


    1. Check if Multiplex communication DTC is output Click here.

      Result
      Condition Proceed to
      Multiplex communication DTC is not output A
      Multiplex communication DTC is output B

    B

    GO TO MULTIPLEX COMMUNICATION SYSTEM Click here

    A

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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

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

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

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

    NG

    REPLACE COMBINATION METER Click here

    OK

  4. READ VALUE USING INTELLIGENT TESTER (COOLANT TEMP)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

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

    5. Check the values by referring to the values in 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) After warming up: 80 to 100°C (176 to 212°F) -
      OK
      Engine coolant temperature value displayed on the intelligent tester is almost the same as actual engine coolant temperature.

    NG

    GO TO SFI SYSTEM (for 2UR-GSE) Click here

    OK

  5. REPLACE COMBINATION METER


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

      OK
      The operation of the combination meter returns to normal.

    NG

    REPLACE ECM (for 2UR-GSE) Click here

    OK

    END