Dynasty V6-181 3.0L SOHC (1991)
Coolant Temperature Sensor/Switch (For Computer): Description and Operation
Coolant Temperature Sensor (Typical)
The Coolant Temperature Sensor (CTS) is installed in the thermostat housing where it maintains constant contact with the engine coolant. The engine
controller sends out a reference voltage of approximately five (5) volts to the coolant temperature sensor. As coolant temperature changes, the internal
resistance of the sensor will change, causing a voltage drop across the sensor. The engine controller reads the voltage drop across the sensor, and
therefore the engine temperature.
The engine controller uses this information to adjust the air/fuel ratio and timing advance. The sensor operates at a temperature range of -40°F to 265°F.
