LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 2007 >> Lucerne V6-3.8L >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Cooling System >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Data Definitions
October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Scan Tool Data Definitions



Scan Tool Data Definitions

ECT
- The scan tool displays -40°C to +151°C (-40°F to +304°F). The engine coolant temperature (ECT) sensor is mounted in the coolant stream. The engine control module (ECM) applies 5 volts to the ECT sensor signal circuit. The sensor is a thermistor which changes internal resistance as temperature changes. When the sensor is cold and the internal resistance is high, the ECM monitors a high signal voltage and interprets it as a cold engine. As the sensor warms and the internal resistance decreases, the voltage signal decreases and the ECM interprets the lower voltage as a warm engine.

FC Relay 1 Command
- The cooling fan relay is commanded ON or OFF by the ECM.

FC Relay 2 and 3 Command
- The cooling fan relay is commanded ON or OFF by the ECM.

FC Relay 1 Circuit Status
- The scan tool displays OK or Fault. This parameter indicates the status for the state of the driver circuit for this device.

FC Relay 2 and 3 Circuit Status
- The scan tool displays OK or Fault. This parameter indicates the status for the state of the driver circuit for this device.

scientia non olet · About LEMON Manuals