Suzuki Workshop Service and Repair Manuals

Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection

Engine Coolant Temperature (ECT) Sensor Inspection

Reference: Engine Coolant Temperature (ECT) Sensor Removal and Installation

Immerse temperature sensing part of ECT sensor in water and measure resistance between sensor terminals while heating water gradually. If measured
resistance doesn't show characteristics as shown in the figure, replace ECT sensor.