Passport EX 4WD V6-3165cc 3.2L DOHC MFI (2001)
Powertrain Control Module: Description and Operation
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).