Coolant Temperature Sensor/Switch (For Computer): Description and Operation

Engine Coolant Temperature (ECT) Sensor:

PURPOSE
Detects engine coolant temperature.

LOCATION
Mounted on the top of the intake manifold coolant outlet, in the RH side of the engine compartment.

OPERATION
The Engine Coolant Temperature (ECT) sensor constantly updates the PCM with an input signal, which the PCM uses to modify the ignition timing, the idle speed, the cooling fan operation, the EGR flow, and the air/fuel ratio.