Cold Start Up

The scan tool displays Yes or No. A cold start up is when the Engine Coolant Temperature (ECT) rises above a predetermined temperature during an ignition cycle. The next ignition cycle the engine coolant temperature should be below a predetermined temperature. Also the engine coolant temperature and the Intake Air Temperature (IAT) are less than 50°C (122°F) and are within 3°C (5°F) of each other at start up. When the above is true the scan tool displays Yes.