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 DIAGNOSTIC TROUBLE CODE CHART for 2GR-FE, See DIAGNOSTIC TROUBLE CODE CHART for 1AR-FE).

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

      Result 

      RESULT CHART
      
      

      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 
   1. Connect Techstream to the DLC3.
   2. Ignition switch on (IG).
   3. Turn the tester 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 - ACTIVE TEST
      
      

      Tester Display	Test Part	Control Range	Diagnostic Note
      Water Temperature Meter Operation	Engine coolant temperature receiver gauge	Low, Normal, Hi	-

      OK: Needle indication is normal. 

      NG: REPLACE COMBINATION METER ASSEMBLY  (See REMOVAL  )

      OK: Go to next step 

3. READ VALUE USING TECHSTREAM 
   1. Connect Techstream to the DLC3.
   2. Ignition switch on (IG).
   3. Turn the tester on.
   4. Enter the following menus: Body Electrical/Combination Meter/Data List.

      Combination Meter: 

      COMBINATION METER - DATA LIST
      
      

      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)	After warming up: 80 to 95°C (176 to 203°F)	If -40°C (-40°F): Sensor circuit open If 140°C (284°F) or more: Sensor circuit shorted

      OK: Engine coolant temperature value displayed on the tester is almost the same as needle indication. 

      NG: REPLACE COMBINATION METER ASSEMBLY  (See REMOVAL  )

      OK: Go to next step 

4. READ VALUE USING TECHSTREAM 
   1. Connect Techstream to the DLC3.
   2. Ignition switch on (IG).
   3. Turn the 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: 

      ENGINE AND ECT - DATA LIST
      
      

      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 tester is almost the same as actual engine coolant temperature. 

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      OK	A
      NG (for 2GR-FE)	B
      NG (for 1AR-FE)	C

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

      C: REPLACE ECM (for 1AR-FE)  (See REMOVAL )

      OK: Go to next step 

5. REPLACE COMBINATION METER ASSEMBLY 
   1. Replace the combination meter assembly with a new or a normal one (See REMOVAL  ).

      OK: The operation of the combination meter assembly returns to normal. 

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      OK	A
      NG (for 2GR-FE)	B
      NG (for 1AR-FE)	C

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

      C: REPLACE ECM (for 1AR-FE)  (See REMOVAL )

      OK: END