Engine Coolant Temperature Gauge Malfunction: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine 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:
   
   

   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 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine 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 (2GR-FSE):
   
   

   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 105°C (176 to 221°F)	-

   OK

   Engine coolant temperature value displayed on the tester is almost the same as actual engine coolant temperature.

   ENGINE AND ECT (1UR-FSE):
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Coolant Temp	Engine coolant Temperature/ Min.: -40°C, Max.: 140°C	After warming up: 75 to 95°C (167 to 203°F)	If value is -40°C (-40°F), sensor circuit is open. If value is 140°C (284°F), sensor circuit is shorted.

   OK

   Coolant temperature displayed on the tester is between 75°C (167°F) and 95°C (203°F) after warming up.

NG → GO TO ENGINE CONTROL SYSTEM 

OK: Go to next step 

OK

Operation of combination meter returns to normal.

NG → GO TO ENGINE CONTROL SYSTEM 

OK → END