Component Function Check

WARNING: This page is about a different car, the 2012 Infiniti FX50. 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.

Terminals	Condition		Resistance (kΩ)
1 and 2	Temperature [°C (°F)]	20 (68)	2.37 - 2.63
		50 (122)	0.68 - 1.00
		90 (194)	0.236 - 0.260

Fig 1: Checking Resistance Between ECT Sensor Terminals By Heating

Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES: GO TO 2.

NO: Proceed to "DIAGNOSIS PROCEDURE ".

CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

Is the inspection result normal?

YES: INSPECTION END

NO: Proceed to "DIAGNOSIS PROCEDURE ".