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ECT Sensor Inspection

Reference: ECT SENSOR REMOVAL AND INSTALLATION

Check ECT sensor resistance as follows.

Check resistance between terminals "1" and "2". Make sure its resistance decreases as its temperature increases.
If measured resistance is out of specification, replace ECT sensor (1).

Fig 1: Checking Resistance Between ECT Sensor Terminals 1 And 2
Courtesy of SUZUKI OF AMERICA CORP.

ECT sensor resistance

-20°C (-4°F): 13.51 - 16.17 kΩ

20°C (68°F): 2.290 - 2.620 kΩ

80°C (176°F): 0.309 - 0.331 kΩ

Fig 2: ECT Sensor Resistance Graph
Courtesy of SUZUKI OF AMERICA CORP.