TROUBLESHOOTING INTRODUCTION - CONTINUED
GENERAL INFORMATION - CONTINUED
Glossary - Continued
Flash Programming. Flash programming is a method of programming or updating an ECM with an electronic service
tool over data link instead of replacing components.
Fuel Temperature Sensor. Fuel temperature sensor detects fuel temperature. ECM monitors fuel temperature and
adjusts calculated fuel rate accordingly.
Fuel Ratio Control (FRC). FRC is a limit based on control of fuel air ratio. FRC is used to control emission. When
ECM senses a higher boost pressure (more air into cylinder), FRC increases FRC Limit (more fuel into cylinder).
Full Load Setting (FLS). FLS is a number that represents fuel system adjustment. This adjustment is made at factory in
order to fine tune fuel system. Correct value for this parameter is stamped on engine information ratings plate. This
parameter must be programmed.
Full Torque Setting (FTS). FTS is similar to full load setting. Parameter must be programmed.
Harness. Harness is a bundle of wiring (loom) that connects all electronic system components.
Hertz (Hz). Hertz measures electrical frequency in cycles per second.
Inlet Manifold Temperature Sensor. This sensor detects inlet manifold temperature. ECM monitors inlet manifold
temperature and other data in order to adjust injection timing and other performance functions.
Integrated Electronic Controls. Engine is designed with electronic controls as necessary part of system. Engine will
not operate without electronic controls.
J1939 CAN Data Link. Data link is an SAE diagnostic communications data link used to communicate between elec-
tronic engine and instrument clusters.
Logged Diagnostic Codes. Logged diagnostic codes are codes stored in memory. These codes are meant to be an indi-
cator of possible causes for intermittent problems. Refer to "Diagnostic Code" in this glossary for more information.
Open Circuit. An open circuit is a condition caused by an open switch or a broken electrical wire or connection. When
this condition exists, signal or supply voltage can no longer reach its intended destination.
Parameter. A parameter is a value or limit that is programmable. This helps determine specific engine characteristics or
Password. A password is a group of numeric or alphanumeric characters designed to restrict access to parameters. Elec-
tronic system requires correct passwords in order to change some parameters (Factory Passwords).
Personality Module. This module is attached to inside of ECM. Module contains all instructions (software) for ECM
and performance maps for a specific horsepower family. Personality module may be reprogrammed through flash pro-
Power Cycle. Power cycle happens when power to ECM is cycled: ON, OFF, and ON. Power cycle refers to action of
cycling engine start switch from any position to OFF position, and to START/RUN position.