Inspection Procedure

HINT:

If there is an open or short in the engine coolant temperature sensor circuit, the ECM outputs the DTCs. Perform troubleshooting with the SFI System (See DTC P0115 ENGINE COOLANT TEMPERATURE CIRCUIT MALFUNCTION; DTC P0117 ENGINE COOLANT TEMPERATURE CIRCUIT LOW INPUT; DTC P0118 ENGINE COOLANT TEMPERATURE CIRCUIT HIGH INPUT (for 2AZ-FE), DTC P0115 ENGINE COOLANT TEMPERATURE CIRCUIT MALFUNCTION; DTC P0117 ENGINE COOLANT TEMPERATURE CIRCUIT LOW INPUT; DTC P0118 ENGINE COOLANT TEMPERATURE CIRCUIT HIGH INPUT (for 2ZR-FE)).

1. CHECK CAN COMMUNICATION SYSTEM 
   1. Check if CAN communication DTC is output (See DIAGNOSIS SYSTEM ).

      Result 

      RESULT REFERENCE
      
      

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

      B: GO TO CAN COMMUNICATION SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

      A: Go to next step 

2. PERFORM ACTIVE TEST USING TECHSTREAM (WATER TEMPERATURE METER OPERATION) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the Techstream on.
   4. Enter the following menus: Body Electrical / Combination Meter / Active Test.
   5. Check the operation by referring to the values in the table below.

      Combination Meter 

      COMBINATION METER REFERENCE CHART
      
      

      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: 

      Gauge indication is normal. 

      NG: REPLACE COMBINATION METER  (See REMOVAL )

      OK: Go to next step 

3. READ VALUE USING TECHSTREAM (COOLANT TEMPERATURE) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the Techstream on.
   4. Enter the following menus: Body Electrical / Combination Meter / Data List.
   5. Check the values by referring to the values in the table below.

      Combination Meter 

      COMBINATION METER REFERENCE CHART
      
      

      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)	-

      Result 

      RESULT REFERENCE
      
      

      Result	Proceed to
      The engine coolant temperature receiver gauge indication is almost the same as the Techstream indication.	A
      The engine coolant temperature receiver indication Is differ from the Techstream indication.	B

      B: REPLACE COMBINATION METER  (See REMOVAL )

      A: Go to next step 

4. READ VALUE USING TECHSTREAM (COOLANT TEMP) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the Techstream 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 

      ITEM RANGE REFERENCE
      
      

      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)	-

      Result 

      RESULT REFERENCE
      
      

      Result	Proceed to
      The engine coolant temperature receiver gauge Indication is almost the same as the actual engine coolant temperature.	A
      The engine coolant temperature receiver gauge Indication is differ from the the actual engine coolant temperature, (for 2AZ-FE)	B
      The engine coolant temperature receiver gauge Indication is differ from the actual engine coolant temperature, (for 2ZR-FE)	C

      B: GO TO SFI SYSTEM (for 2AZ-FE)  (See HOW TO PROCEED WITH TROUBLESHOOTING )

      C: GO TO SFI SYSTEM (for 2ZR-FE)  (See HOW TO PROCEED WITH TROUBLESHOOTING )

      A: Go to next step 

5. REPLACE COMBINATION METER 
   1. Replace the combination meter with a new or a known good one (See REMOVAL ).

      OK: 

      The operation of the combination meter returns to normal. 

      Result 

      RESULT REFERENCE
      
      

      Result	Proceed to
      OK	A
      NG (for 2AZ-FE)	B
      NG (for 2ZR-FE)	C

      B: REPLACE ECM (for 2AZ-FE)  (See REMOVAL )

      C: REPLACE ECM (for 2ZR-FE)  (See REMOVAL )

      A: END