Engine Coolant Temperature Sensor

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

Fig 1: Checking Sensor Resistance While Monitoring Temperature

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

< Reference data>

TERMINAL VOLTAGE & RESISTANCE CHART

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⁾	These data are reference values and are measured between ECM terminal 73 (Engine coolant temperature sensor) and ground.

If NG, replace engine coolant temperature sensor.

Fig 2: Sensor Resistance VS Temperature Graph
Courtesy of NISSAN MOTOR CO., U.S.A.