Engine Coolant Temperature Sensor: Inspection

INSPECT E.F.I. ENGINE COOLANT TEMPERATURE SENSOR

Check the resistance.

Using an ohmmeter, measure the resistance between the terminals.

Resistance

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Specified Condition
1 (E2) - 2 (THW)	2.32 to 2.59 k at 20°C (68°F)
1 (E2) - 2 (THW)	0.310 to 0.326 k 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 up water on the engine coolant temperature sensor.

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

Fig 1: Checking Engine Coolant Temperature Sensor Resistance