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Glossary<br />
GLOSSARY OF TERMS AND ABBREVIATIONS<br />
OBD2 – On-Board Diagnostics Version 2 (also referred to as “OBD II”)<br />
On-Board Computer – The central processing unit in the vehicle’s<br />
computer control system.<br />
PCM – Powertrain Control Module<br />
Pending Code – A code recorded on the “first trip” for a “two-trip” code.<br />
If the fault that caused the code to be set is not detected on the second<br />
trip, the code is automatically erased.<br />
PID – Parameter Identification<br />
STFT – Short 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. The vehicle uses<br />
this program to make minor fuel adjustments (fine tune) on a short-term<br />
basis.<br />
Trip Drive Cycle – Vehicle operation that provides the necessary<br />
driving condition to enable a vehicle Monitor to run and complete its<br />
diagnostic testing.<br />
VECI – Vehicle Emission Control Information Decal<br />
CanOBD2&1 115
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