ECM

Updated: June 3, 2025

Definition

Engine Control Module (ECM) is the primary computer that controls engine operation, managing fuel injection, ignition timing, emissions control, and engine protection systems.

Category: Specific Control Modules

Specialized electronic control units that manage specific vehicle subsystems

The Engine Control Module monitors engine sensors and controls actuators to optimize engine performance, fuel economy, and emissions while protecting the engine from damage through sophisticated control algorithms.

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Related Terms

APIM

Specific Control Modules

Accessory Protocol Interface Module (APIM) is an electronic control unit that manages vehicle infotainment systems, connectivity features, and communication protocols between various vehicle systems.

BCM

Specific Control Modules

Body Control Module (BCM) is an electronic control unit that manages various body-related electrical functions including lighting, windows, door locks, and other comfort and convenience features.

TCM

Specific Control Modules

Transmission Control Module (TCM) is a specialized electronic control unit that manages automatic transmission operation, controlling shift points, torque converter lockup, and transmission protection strategies.