Scan Tool Data Definitions

WARNING: This page is about a different car, the 2007 Saturn Outlook. However, it is still accessible from the selected car via links, so may be relevant.

ECT: The scan tool displays -40 to +151°C (-40 to +304°F). The engine coolant temperature (ECT) sensor is mounted in the coolant stream. The powertrain control module (PCM) or engine control module (ECM) applies 5 volts to the ECT sensor circuit. The sensor is a thermistor which changes internal resistance as temperature changes. When the sensor is cold (internal resistance high), the PCM or ECM monitors a high signal voltage and interprets it as a cold engine. As the sensor warms and internal resistance decreases, the voltage signal decreases and the PCM or ECM interprets the lower voltage as a warm engine.
FC Relay 1 Circuit Status: This parameter indicates the status for the state of the driver circuit.
FC Relay 1 Command: The scan tool displays On or Off. This parameter indicates the commanded state of the low speed fan relay driver.
FC Relay 2 and 3 Circuit Status: This parameter indicates the status for the state of the driver circuit.
FC Relay 2 and 3 Command: The scan tool displays On or Off. This parameter indicates the commanded state of the high speed fan relay driver.