METER / GAUGE SYSTEM Engine Coolant Temperature Receiver Gauge Malfunction

DESCRIPTION

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

WIRING DIAGRAM

INSPECTION PROCEDURE

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

      Combination Meter

      Tester Display	Test Part	Control Range	Diagnostic Note
      Water Temperature Meter Operation	Engine coolant temperature receiver gauge	OFF, LOW, NORMAL, HIGH	-

      OK
      Engine coolant temperature receiver gauge indication is normal.

   
   

   NG

   REPLACE COMBINATION METER ASSEMBLY Click here

   OK

3. CHECK SFI SYSTEM

   
   

   1. Check if the SFI system output the DTC Click here for 2AR-FE, Click here for 2GR-FE, Click here for 6AR-FSE).

      Result
      Result Proceed to SFI system DTCs are not output. A SFI system DTCs are output (for 2AR-FE). B SFI system DTCs are output (for 2GR-FE). C SFI system DTCs are output (for 6AR-FSE). D

   
   

   B

   GO TO SFI SYSTEM Click here

   C

   GO TO SFI SYSTEM Click here

   D

   GO TO SFI SYSTEM Click here

   A

4. READ VALUE USING GTS (COOLANT TEMP, 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:

      
      

      1. for Engine and ECT: Powertrain / Engine and ECT / Data List.

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

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

      Engine and ECT

      Tester Display	Measurement Item/Range	Normal Condition	Stored as Freeze Frame Data
      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	Yes
      	Diagnostic Note: This is the engine coolant temperature. Tech Tips After warming up the engine, the engine coolant temperature is 75 to 100°C (167 to 212°F). After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature are approximately equal. If the value is -40°C (-40°F), or 140°C (284°F), the sensor circuit is open or shorted. Check if the engine overheats when the value indicates 140°C (284°F).

      Combination Meter

      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	-

      Result
      Result Proceed to The data list values of the ECUs match. A The data list values of the ECUs do not match (for 2AR-FE). B The data list values of the ECUs do not match (for 2GR-FE). C The data list values of the ECUs do not match (for 6AR-FSE). D

      Tech Tips

      
      

      • When the Data List values of the ECUs match, an internal malfunction of the combination meter assembly is suspected.

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

   
   

   B

   REPLACE ECM Click here

   C

   REPLACE ECM Click here

   D

   REPLACE ECM Click here

   A

   REPLACE COMBINATION METER ASSEMBLY Click here