Engine Coolant Temperature Sensor: Inspection

INSPECT ENGINE COOLANT TEMPERATURE SENSOR

Measure the resistance.
1. Using an ohmmeter, measure the resistance between the terminals.

Standard Resistance

RESISTANCE REFERENCE

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

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

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

Fig 1: Resistance And Temperature Graph