Diagnostic Test

1. Turn ignition switch OFF.
2. Disconnect engine coolant temperature sensor harness connector.
3. Remove engine coolant temperature sensor. Refer to REMOVAL AND INSTALLATION .
4. Check resistance between engine coolant temperature sensor terminals by heating with hot water as shown in the figure below.
   Fig 1: Checking Engine Coolant Temperature Sensor

   Courtesy of NISSAN NORTH AMERICA, INC.

   Terminals	Condition		Resistance (kΩ)
   1 and 2	Temperature [°C (°F)]	20 (68)	2.10 - 2.90
   		50 (122)	0.68 - 1.00
   		90 (194)	0.236 - 0.260

Is the inspection result normal?

YES 

INSPECTION END

NO 

Replace engine coolant temperature sensor. Refer to REMOVAL AND INSTALLATION .