Engine Control Module: Description and Operation

Powertrain Control Module (PCM):

The Powertrain Control Module (PCM) retrieves inputs from various engine sensors to compute the required fuel flow rate necessary to maintain a proper air/fuel ratio throughout the entire engine operational range.

The PCM also determines and compensates the vehicle's uniqueness. The system will also compensate for changes in altitude (i.e., from sea level to mountains).

The 104-pin EEC-V system PCM outputs a command to the Injector Driver Module (IDM) which in turn energizes the fuel injector with up to 115V DC. The fuel injector is controlled by the in IDM to meter the appropriate quantity of fuel at the correct time and duration.