Engine Coolant Temperature Sensor: Inspection

INSPECT ENGINE COOLANT TEMPERATURE SENSOR

Measure the resistance.

Using an ohmmeter, measure the resistance between the terminals.

Standard resistance

RESISTANCE SPECIFICATION

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

NOTE: When checking the engine coolant temperature sensor in the water, keep the terminals dry. After the check, wipe the sensor dry.

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

Fig 1: Measuring Resistance Between Engine Coolant Temperature Sensor Terminals