Coolant Temperature Sensor CTS
Coolant Temperature Sensor Two wires which are connected to the engine computer PCM deliver feedback data which is then used to adjust engine and emission management systems.
Coolant Temperature Sensor Two Wires These wires are connected to the sensor using a plastic connector designed to absorb engine vibration without failing.
Coolant Temperature Sensor Connector
Coolant Sensor Helpful Information The temperature sensor is comprised of a housing filled with a composite which varies the resistance through its internal circuit as temperatures increases or decreases, which also provides data to adjust the in-dash gauge to inform the driver on engine operating temperatures. In older models this operation was perform by a coolant sensor which had one wire that performed the gauge readings solely. Also described as an ECTS (electronic coolant temperature sensor) these sensors are easily tested using a voltmeter that can read the ohms of resistance which can be compared to a new sensor or factory specifications. When this sensor fails it will set a trouble code which is indicated by a service engine soon or check engine warning light and can cause engine run-ability problems, a coolant leak can cause a false reading as well due to the lack of liquid in the cooling system.