Component Inspection

1. Turn ignition switch OFF.
2. Disconnect engine coolant temperature sensor harness connector.
3. Remove engine coolant temperature sensor.
4. Check resistance between engine coolant temperature sensor terminals by heating with hot water as shown in the figure.
   TERMINAL RESISTANCE REFERENCE CHART
   
   

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

Is the inspection result normal? 

YES: INSPECTION END

NO: Replace engine coolant temperature sensor.

Fig 1: Checking Resistance Between Engine Coolant Temperature Sensor Terminals By Heating With Hot Water

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