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Home >> Isuzu >> 2007 >> Ascender 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 470 (Engine Control System & Fuel System - 4.2L - Introduction) >> Description and Operation >> Electronic Ignition (EI) System Description >> Engine Control Module (ECM)

Engine Control Module (ECM)

WARNING: This page is about a different car, the 2009 GMC Envoy and 2009 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

The engine control module (ECM) controls all ignition system functions, and constantly corrects the spark timing. The ECM monitors information from various sensor inputs that include the following:

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