Engine Coolant Temperature Sensor

WARNING: This page is about a different car, the 2006 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

Check resistance between engine coolant temperature sensor terminals 1 and 2 as shown in the figure.

Fig 1: Identifying Sensor Resistance While Monitoring Temperature

Courtesy of NISSAN MOTOR CO., U.S.A.

< Reference data>

ENGINE COOLANT TEMPERATURE RESISTANCE REFERENCE

Engine coolant temperature °C (°F)	Resistance kΩ
20 (68)	2.1 - 2.9
50 (122)	0.68 - 1.00
90 (194)	0.236 - 0.260

If NG, replace engine coolant temperature sensor.

Fig 2: Sensor Resistance VS Temperature Graph

Courtesy of NISSAN MOTOR CO., U.S.A.