honda Workshop Repair Guides

Honda Civic 15L SOHC (16 valve) Workshop Service and Repair Manuals

Main Relay (Computer/Fuel System) > < Engine Control Module|Locations|Page 2170
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Engine Control Module: Description and Operation

PURPOSE

The Engine Control Module (ECM) contains the micro-processor which is the "brain" of the Programmed Fuel Injection (PGM-FI) system.

OPERATION

The ECM sends "reference" signals to various sensors and receives modified signals which indicate current engine operating parameters. The
ECM matches these values to the values that are stored in ROM memory. It then controls various functions, such as Fuel Injector duration and
Ignition timing, to keep the engine within established operating parameters. 

Main Relay (Computer/Fuel System) > < Engine Control Module|Locations|Page 2170