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Glossary<br />
GLOSSARY OF TERMS AND ABBREVIATIONS<br />
GLOSSARY OF TERMS AND ABBREVIATIONS<br />
CARB – California Air Resources Board<br />
CCM – Central Control Module<br />
Computer Control System – An electronic control system, consisting<br />
of an on-board computer and related sensors, switches and actuators,<br />
used to ensure peak performance and fuel efficiency while reducing<br />
pollutants in the vehicle’s emissions.<br />
DIY – Do-It-Yourself<br />
DLC – Data Link Connector<br />
Drive Cycle – An extended set of driving procedures that takes into<br />
consideration the various types of driving conditions encountered in real<br />
life.<br />
Driving Condition – A specific environmental or operation condition<br />
under which a vehicle is operated; such as starting the vehicle when<br />
cold, driving at steady speed (cruising), accelerating, etc.<br />
DTC(s) – Diagnostic Trouble Code(s)<br />
EGR – Exhaust Gas Recirculation<br />
EPA – Environmental Protection Agency<br />
EVAP – Evaporative Emissions System<br />
Fault Code – See DTCs<br />
Freeze Frame – A digital representation of engine and/or emissions<br />
system conditions present when a fault code was recorded.<br />
FTP – Fuel Tank Pressure<br />
Generic Code – A DTC that applies to all OBD2 compliant vehicles.<br />
I/M Readiness – An indication of whether or not a vehicle’s emissionsrelated<br />
system are operating properly and are ready for Inspection and<br />
Maintenance testing.<br />
I/M Test / Emissions Test / Smog Check – A functional test of a<br />
vehicle to determine if tailpipe emissions are within Federal/State/Local<br />
requirements.<br />
LCD – Liquid Crystal Display<br />
LED – Light Emitting Diode<br />
LTFT – Long Term Fuel Trim, is a program in the vehicle’s computer<br />
designed to add or subtract fuel from the vehicle to compensate for<br />
operating conditions that vary from the ideal A/F ratio (long term).<br />
Manufacturer Specific Code – A DTC that applies only to OBD2<br />
compliant vehicles made by a specific manufacturer.<br />
MIL – Malfunction Indicator Lamp (also referred to as “Check Engine”<br />
light<br />
OBD1 – On-Board Diagnostics Version 1 (also referred to as “OBD I”)<br />
114 CanOBD2&1
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