Coolant Temperature Sensor

Fig 1: Identifying Coolant Temperature Sensor

Courtesy of VOLVO CARS CORPORATION

The coolant temperature sensor enables the control module to determine coolant temperature and thereby when the heater should be switched on or off.

The coolant temperature sensor is integrated in the heater, located next to the overheating sensor under a cover on one side of the heater.

There are diagnostics for the electronics of the coolant temperature sensor.