Engine Coolant Temperature Sensor: Inspection

WARNING: This page is about a different car, the 2007 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT E.F.I. ENGINE COOLANT TEMPERATURE SENSOR

Check the resistance.

Using an ohmmeter, measure the resistance between the terminals.

Standard

STANDARD REFERENCE CHART

Tester Connection	Specified Condition
1 (E2) - 2 (THW)	2.32 to 2.59 kΩ at 20°C (68°F)
1 (E2) - 2 (THW)	0.310 to 0.326 kΩ at 80°C (176°F)

NOTE: If checking the engine coolant temperature sensor in water, be careful not to allow water to intrude into the terminals. After checking, wipe the water off the engine coolant temperature sensor.

If the result is not as specified, replace the engine coolant temperature sensor.

Fig 1: Measuring Resistance Between Terminals With Ohmmeter

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.