Component Inspection (Engine Coolant Temperature Sensor)

WARNING: This page is about a different car, the 2013 Infiniti M56. However, it is still accessible from the selected car via links, so may be relevant.

CHECK ENGINE COOLANT TEMPERATURE (ECT) SENSOR

Turn ignition switch OFF.
Disconnect ECT sensor harness connector.
Remove ECT sensor. Refer to "EXPLODED VIEW ".

Check resistance between ECT sensor terminals by heating with hot water as shown in the figure below.

Terminals	Condition		Resistance (kΩ)
1 and 2	Temperature [°C (°F)]	20 (68)	2.1 - 2.9
		50 (122)	0.68 - 1.00
		90 (194)	0.236 - 0.260

Fig 1: Checking ECT Sensor

Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES: INSPECTION END

NO: Replace ECT sensor. Refer to "EXPLODED VIEW ".