LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2006 >> Optra LS, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 41 (Engine Controls - 1.4L DOHC - Introduction And Mechanical Repairs) >> Description and Operation >> Engine Control Module (ECM) Description >> Notes

Engine Control Module (ECM) Description: Notes

WARNING: This page is about a different car, the 2005 Chevrolet Optra5 and 2005 Chevrolet Optra. However, it is still accessible from the selected car via links, so may be relevant.

The engine control module (ECM) is the control center of the engine controls system. The ECM constantly monitors information from various sensors and controls the systems that affect vehicle performance and emissions. The ECM also performs diagnostic tests on various parts of the system. The ECM can detect operational malfunctions and alert the driver via the malfunction indicator lamp (MIL). When the ECM detects a malfunction, it stores a diagnostic trouble code (DTC). The condition is identified by the particular DTC that is set. This aids the technician in making repairs.

scientia non olet · About LEMON Manuals