Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

If DTC U0100 has been stored, troubleshoot the CAN communication system first.
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.

PERFORM ACTIVE TEST BY TECHSTREAM (WATER TEMPERATURE METER OPERATION)

Connect Techstream to the DLC3.
Turn the ignition switch ON.
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:

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

READ VALUE OF DATA LIST (COOLANT TEMPERATURE)

Connect Techstream to the DLC3.
Turn the ignition switch ON.
Turn the tester on.
Enter the following menus: Body Electrical / Combination Meter / Data List.

Check the values by referring to 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 100°C (176 to 212°F)	If-40°C (-40°F): Sensor circuit open If 140°C (284°F) or more: Sensor circuit shorted

OK:

Engine coolant temperature value displayed on the tester is almost the same as needle indication.

NG: REPLACE COMBINATION METER ASSEMBLY

OK:GO TO SFI SYSTEM