Glossary “warm-up cycle” Definition:
PCM uses warm-up cycles instead of key cycles to clear DTC’s from ODB II systems. A warm-up cycle is achieved when the engine coolant rises at least 40¡ãF from start-up and achieves a minimum temperature of 160¡ãF.

Glossary “warm up regulator” Definition:
Device on some fuel injection systems to adjust the air/fuel mixture while the engine is warming up.