Engine Coolant Temperature (ECT) Sensor

This sensor inputs the coolant temperature to the ECA. The ECT is threaded into the heater outlet fitting or an engine coolant passage near the thermostat housing. The signal from the ECT affects the following:

• Air/Fuel Ratio
• Idle Speed
• EGR Flow
• Purge Flow
• Fuel Pressure
• Ignition Timing Output Signal From ECA