Acronyms and Definitions

NOTE: This acronyms and definitions listing contains technical terms applicable to Ford Motor Company products. It is not intended to be an all-inclusive dictionary of components and their functions. If a detailed description of a particular system or component is desired, refer to the appropriate component or system in Computers and Control Systems for the specific vehicle being serviced.

AFCM Alternative Fuel Control Module.
Bus + or Bus - Multiplex circuits that carry SCP data from module to module to the DLC.
CNG Compressed Natural Gas.
CONT Continuous Memory. The portion of KAM (keep alive memory) used to store DTCs generated during Continuous Memory Self-Test.
DLC Data Link Connector. J1962 connector providing access to vehicle diagnostic information.
DTC Diagnostic Trouble Code. An alpha/numeric identifier for a fault condition identified by the On-Board Diagnostic System.
KOEO Key On Engine Off.
KOER Key On Engine Running.
LPG Liquefied Petroleum Gas.
MIL Malfunction Indicator Lamp. An indicator lamp alerting the driver of an emission related malfunction. May also read "CHECK ENGINE" or "SERVICE ENGINE SOON."
PCM Powertrain Control Module.
PID Parameter Identifier. Identifies an address in PCM memory that contains operating information.
PSIA Pressure-Absolute. A pressure reference to a perfect vacuum.
PSIG Pressure-Gauge. The amount by which absolute pressure exceeds the ambient atmospheric pressure.
SCP Standard Corporate Protocol.