Perkins 2206-E13 Operation And Maintenance Manual page 28

28 SEBU8337
Operation Section
Features and Controls
Electronic Control Module 9
The ECM controls the engine operating parameters
through the software within the ECM and the inputs
from the various sensors. The software within the
ECM can be changed by installing a new flash file.
The flash file defines the following characteristics
of the engine:Engine power, Torque curves, Engine
speed (rpm), Engine Noise, Smoke, and Emissions.