XJR (X308) V8-4.0L SC (AJ26) (1998)
Coolant Temperature Sensor/Switch (For Computer): Description and Operation
Engine Coolant Temperature Sensor (ECT) and ECM
The engine coolant temperature (ECT) sensor is located in the coolant outlet pipe and reacts to engine coolant temperature changes, providing an
input to the Engine Control Module (ECM). The sensor has a negative temperature coefficient so that the sensor resistance decreases as temperature
rises.