METER / GAUGE SYSTEM Malfunction in Water Temperature Warning Light

DESCRIPTION

In this circuit, the combination meter assembly (meter circuit plate) receives engine coolant temperature signals from the ECM via CAN communication. The combination meter assembly (meter circuit plate) displays an engine coolant temperature warning based on the data received from the ECM.

WIRING DIAGRAM

B006ID6E85
*1 Combination Meter Assembly (Meter Circuit Plate)
*2 CAN Communication Line

CAUTION / NOTICE / HINT

Note

When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

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/ Canister Pump Module: Click here

w/o Canister Pump Module: Click here

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if CAN communication system DTCs are output.

      Click here

      Result
      Result Proceed to
      DTCs are not output A
      DTCs are output B

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK FOR DTC (SFI SYSTEM)


    1. Check if SFI system DTCs are output.

      w/ Canister Pump Module: Click here

      w/o Canister Pump Module: Click here


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output A
      DTCs are output B

    B

    GO TO SFI SYSTEM w/ Canister Pump Module: Click here
    GO TO SFI SYSTEM w/o Canister Pump Module: Click here

    A

  3. PERFORM ACTIVE TEST USING GTS (INDICAT. LAMP COOLANT HOT)


    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
      Indicat. Lamp Coolant Hot Engine coolant temperature hot warning light OFF or ON -

      Body Electrical > Combination Meter > Active Test
      Tester Display
      Indicat. Lamp Coolant Hot
      OK
      Engine coolant temperature hot warning light operation is normal.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPLACE COMBINATION METER ASSEMBLY (METER CIRCUIT PLATE) Click here