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Home >> Pontiac >> 1999 >> Firebird V8-5.7L VIN G >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Data Definitions - Powertrain Systems >> Cold Start Up
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Cold Start Up

The scan tool displays Yes or No. A cold start-up is when the engine coolant temperature 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 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.