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" (See DIAGNOSTIC TROUBLE CODE CHART ).

1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER 
   1. Operate the intelligent tester according to the steps on the display and select the "ACTIVE TEST".

   METER: 

   TEST DETAILS AND DIAGNOSTIC NOTE
   
   

   Item	Test Details	Diagnostic Note
   COOLANT TEMP	LOW/NORMAL/HI	-

   OK: 

   Needle indication is normal. 

   NG: REPLACE COMBINATION METER ASSEMBLY 

   OK: Go to Next Step 

2. READ VALUE OF INTELLIGENT TESTER (ENGINE COOLANT) 
   1. Operate the intelligent tester according to the steps on the display and select the "DATA LIST".

   ENGINE: 

   TEST DETAILS AND DIAGNOSTIC NOTE
   
   

   Item	Measurement Item / Display (Range)	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 (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 warming up. 

   NG: GO TO  ENGINE CONTROL SYSTEM -- AVALON 

   OK: Go to Next Step 

3. REPLACE COMBINATION METER ASSEMBLY 

   OK: 

   Operation of combination returns to normal. 

   NG: GO TO  ENGINE CONTROL SYSTEM -- AVALON 

   OK: END