Electronic Control Module (ECM): Notes

The ECM not only controls fuel delivery but also performs diagnostic functions for the systems that affect vehicle performance. Information from all data sensors is received and processed by ECM to produce proper pulse duration ("on" time) for injector. For additional information on sensors and ECM controls, refer to CCC THEORY/OPERATION article. The ECM performs calculations to control fuel operating modes such as starting, clear flood, run, acceleration, deceleration, battery voltage correction and fuel cut-off. ECM's have "learning process" capacity.