Engine Control Module: Description and Operation

Input Signals:

Input Signals

Control Functions:

Control Functions

PURPOSE
Motronic 4.3 electronic fuel injection/ignition ECM controls:
^ Fuel Injection
^ Ignition
^ Idle speed
^ Turbo charger boost pressure
^ Engine cooling fan
^ EGR System
^ EVAP System

OPERATION
The ECM uses a microprocessor to convert input signals into the necessary output functions.

The ECM also incorporates on-board diagnostics (OBD) to monitor system operation.

The ECM incorporates "self-learning" (adaptive) functions which allow it to adjust output functions for various operating conditions.

SYSTEM DESCRIPTION
Additional information is available under "SYSTEM DESCRIPTION."