Inspection Procedure

HINT:

If there is an open or short in the engine coolant temperature sensor circuit, the hybrid vehicle control ECU outputs the DTCs. Perform troubleshooting with the "SFI System" (See DIAGNOSTIC TROUBLE CODE CHART ).

1. PERFORM ACTIVE TEST BY TECHSTREAM (WATER TEMPERATURE METER OPERATION) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to the ON position
   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: 

      CONTROL RANGE CHART
      
      

      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 

   OK: Go to next step. 

2. READ VALUE OF TECHSTREAM (COOLANT TEMPERATURE) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to the ON position.
   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: 

      MEASUREMENT ITEM/RANGE CHART
      
      

      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

   NG:  GO TO SFI SYSTEM

   OK: Go to next step. 

3. REPLACE COMBINATION METER ASSEMBLY 

   NG:  GO TO COMBINATION METER 

   OK: END