Engine Coolant Temperature Sensor

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

Fig 1: Checking Resistance Between Engine Coolant Temperature Sensor Terminals 1 And 2

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

< Reference data >

ENGINE COOLANT TEMPERATURE REFERENCE

Engine coolant temperature °C (°F)

Voltage ⁽¹⁾ V

Resistance kΩ

20 (68)

3.5

2.1-2.9

50 (122)

2.2

0.68-1.00

90 (194)

0.9

0.236-0.260

⁽¹⁾	This data is reference value and is measured between ECM terminal 73 (Engine coolant temperature sensor) and ground.

If NG, replace engine coolant temperature sensor.

Fig 2: Engine Coolant Temperature Graph
Courtesy of NISSAN MOTOR CO., U.S.A.