ECT Sensor No.1

Remove the ECT sensor No.1. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION ).
Place the ECT sensor No.1 in water with a thermometer, and heat the water gradually.

Fig 1: Measuring ECT Sensor No.1 Temperature Using Thermometer
Measure the resistance between ECT sensor No.1 terminals A and B.
- If not as specified, replace the ECT sensor No.1. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION ).

RESISTANCE SPECIFICATION

ECT (°C {°F})	Resistance (Kilohms)
20 {68}	Approx. 2.45
80 {176}	Approx. 0.318

Fig 2: Identifying ECT Sensor No.1 Connector Terminals

Fig 3: ECT Sensor No.1 Resistance Versus Temperature Graph