Inspection Procedure

HINT:

If there is an open or short in the engine coolant temperature sensor circuit, an SFI system DTC is output. If output, perform troubleshooting on the SFI system first.

PERFORM ACTIVE TEST USING TECHSTREAM

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the tester ON.
Enter the following menus: Body Electrical / Combination Meter / Active Test.

Check the operation by referring to the values in the table below.

Combination Meter:

TESTER DISPLAY REFERENCE 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

OK : Go to next step

READ VALUE USING TECHSTREAM

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the tester ON.
Enter the following menus: Powertrain / Engine and ECT / Data List.

Check the values by referring to the values in the table below.

Engine and ECT (2GR-FSE):

TESTER DISPLAY REFERENCE CHART

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 REFERENCE CHART

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

REPLACE COMBINATION METER
OK:

Operation of combination meter returns to normal.

NG : GO TO ENGINE CONTROL SYSTEM

OK : END