Inspection Procedure

HINT:

If there is an open or short in the engine coolant temperature sensor circuit, the ECM outputs DTCs. Perform troubleshooting with the "SFI System 05-5, 05-350".

1. PERFORM ACTIVE TEST BY HAND-HELD TESTER 
   1. Operate the hand-held tester according to the steps on the display and select the "ACTIVE TEST".

      METER:

      COOLANT TEMP TEST DETAILS
      
      

      Item	Test Details
      COOLANT TEMP	LOW/NORMAL/HI

      OK: Needle indication is normal. 

      1. NG: REPLACE COMBINATION METER ASSY (See  OVERHAUL  ) 
      2. OK: GO TO NEXT STEP. 
2. READ VALUE OF HAND-HELD TESTER (ENGINE COOLANT) 
   1. Operate the hand-held tester according to the steps on the display and select the "DATA LIST".

      ECM:

      ITEM MEASUREMENT AND CONDITION
      
      

      Item	Measurement Item/ Range (Display)	Normal Condition	Diagnostic Note
      COOLANT TEMP	Coolant Temperature / Min.: (-40°C) (-40°F), Max.: 140°C (284°F)	After warming up: 80 to 95°C to (176 to 203°F)	If the value is "-40°C (-40°F)" or "140°C (284°F)", sensor circuit is open or shorted.

      OK:Coolant temperature displayed on the tester is between 80°C (176°F) and 95°C (203°F) after warning up. 

      1. NG: GO TO ENGINE CONTROL SYSTEM (See  HOW TO PROCEED WITH TROUBLESHOOTING (2AZ-FE)  ,  HOW TO PROCEED WITH TROUBLESHOOTING (3MZ-FE)  ) 
      2. OK: GO TO NEXT STEP. 
3. REPLACE COMBINATION METER ASSY 

   OK: Normal operation 

   1. NG: GO TO ENGINE CONTROL SYSTEM (See  HOW TO PROCEED WITH TROUBLESHOOTING (2AZ-FE)  ,  HOW TO PROCEED WITH TROUBLESHOOTING (3MZ-FE)  ) 
   2. OK:END.