Coolant Temperature Sensor

WARNING: This page is about a different car, the 2011 Nissan Leaf. However, it is still accessible from the selected car via links, so may be relevant.

The coolant temperature sensor is detects the coolant temperature. This sensor uses a thermistor that changes its electrical resistance according to the temperature. VCM detects a voltage change according to electrical resistance change.

Fig 1: Identifying Coolant Temperature Sensor

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

COOLANT TEMPERATURE, VOLTAGE AND RESISTANCE REFERENCE CHART

Coolant temperature [°C (°F)]	Voltage (V)	Resistance (kΩ)
-10 (14)	4.4	7.0 - 11.4
20 (68)	3.5	2.35 - 2.73
50 (122)	2.2	0.68 - 1.00
90 (194)	0.9	0.236 - 0.260

Fig 2: Coolant Temperature Sensor Temperature, Resistance And Voltage Graph

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