METER / GAUGE SYSTEM Engine Coolant Temperature Receiver Gauge Malfunction

DESCRIPTION

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

WIRING DIAGRAM

B001D2OE01
except 5L-E
*1 Combination Meter Assembly
*2 CAN Communication Line
B001E4RE21
for 5L-E
*1 THWO
*2 TEMP
*3 Combination Meter Assembly

CAUTION / NOTICE / HINT

Tech Tips

If there is an open or short in the engine coolant temperature sensor circuit, the ECM stores the DTCs. Troubleshoot the SFI System*1 or ECD System*2.


PROCEDURE


  1. CHECK ENGINE TYPE


    1. Check the engine type.

      Result
      Result Proceed to
      except 5L-E A
      for 5L-E B

    B

    PERFORM ACTIVE TEST USING GTS (WATER TEMPERATURE METER OPERATION) Click here

    A

  2. CHECK CAN COMMUNICATION SYSTEM


    1. Check if a CAN communication DTC is output.


      1. w/ Central Gatway ECU Click here.

      2. w/o Central Gatway ECU Click here.

        Result
        Result Proceed to
        CAN communication DTC is not output. A
        CAN communication DTC is output. (w/ Central Gatway ECU) B
        CAN communication DTC is output. (w/o Central Gatway ECU) C

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

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


    1. Using the GTS, perform the Active Test Click here.

      Combination Meter
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Water Temperature Meter Operation Engine coolant temperature receiver gauge OFF, 45, 60, 70, 80, Middle, 110, 120, 127 -
      OK
      Engine coolant temperature receiver gauge indication is normal.

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  4. READ VALUE USING GTS (COOLANT TEMPERATURE)


    1. Using the GTS, read the Data List Click here.

      Combination Meter
      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 the engine -
      OK
      Coolant temperature displayed on the GTS is between 75°C (167°F) and 100°C (212°F) after warming up.

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

  5. READ VALUE USING GTS (COOLANT TEMP)


    1. Using the GTS, read the Data List Click here.

      Engine and ECT
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Coolant Temp Engine coolant temperature/Min.: -40°C (-40°F), Max: 215°C (419°F) 75 to 100°C (167 to 212°F): After warming up the engine -
      OK
      Engine coolant temperature value displayed on the GTS is almost the same as actual engine coolant temperature.
      Result
      Result Proceed to
      OK A
      NG (for 1GR-FE) B
      NG (for 2TR-FE) C
      NG (for 1KD-FTV) D
      NG (for 1GD-FTV) E

    A

    REPLACE COMBINATION METER ASSEMBLY Click here

    B

    REPLACE ECM Click here

    C

    REPLACE ECM Click here

    D

    REPLACE ECM Click here

    E

    REPLACE ECM Click here

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


    1. Using the GTS, perform the Active Test Click here.

      Combination Meter
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Water Temperature Meter Operation Engine coolant temperature receiver gauge LOW, 60, 70, 80, Normal, 110, 120, HIGH -
      OK
      Engine coolant temperature receiver gauge indication is normal.

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  7. READ VALUE USING GTS (COOLANT TEMPERATURE)


    1. Using the GTS, read the Data List Click here.

      Combination Meter
      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 the engine -
      OK
      Coolant temperature displayed on the GTS is between 75°C (167°F) and 100°C (212°F) after warming up.

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

  8. READ VALUE USING GTS (COOLANT TEMP)


    1. Using the GTS, read the Data List Click here.

      Engine and ECT
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Coolant Temp Engine coolant temperature/Min.: -40°C (-40°F), Max: 215°C (419°F) 75 to 100°C (167 to 212°F): After warming up the engine -
      OK
      Engine coolant temperature value displayed on the GTS is almost the same as actual engine coolant temperature.

    NG

    REPLACE ECM Click here

    OK

  9. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)


    1. Disconnect the G6 combination meter assembly connector.

    2. Disconnect the G183 ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      G6-35 (TEMP) - G183-12 (THWO) Always Below 1 Ω
      G6-35 (TEMP) or G183-12 (THWO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK COMBINATION METER ASSEMBLY


    1. Replace the combination meter assembly Click here.

    2. Check that the operation of the engine coolant temperature receiver gauge returns to normal.

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

    OK

    END (COMBINATION METER ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE ECM Click here