Manuals through 2025 now available!
Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.
LEMON is the spiritual successor to CHARM, I recommend you try it!
Link:
lemon-manuals.la
If it fails:
lemon-manuals.org.ua
Or, hide this message:
temporarily or
permanently
Circuit Operation
The engine or
powertrain control module (ECM or
PCM) receives inputs from the engine sensors and switches, controlling the functions of the engine. It also turns on the malfunction indicator "check engine" light whenever a malfunction or abnormal engine performance is detected, and allows for diagnostic testing through the data link connector (DLC).