The ECM is a game-changer in automotive diagnosis thanks to OBD (On-Board Diagnosis) ports and codes. Not too long ago, mechanics had to rely on symptoms to properly diagnose car problems.

The engine control module, or ECM, controls plenty of functions during routine driving, so any issues with that part could cause severe problems.

Source Code: Toyota Fights to Limit ECU Code Viewing in Legal Battle Could Toyota’s source code hold the answer to its sudden acceleration problems?

This book will guide you through emission problems, engine codes, ECM wiring, and sensor testing. This book is available through Corvette Central, PN 114083; www.corvettecentral.com.