Glossary
98 MD70
OBD2
– On-Board Diagnostics Version 2 (also referred to as “OBD II”)
On-Board Computer
– The central processing unit in the vehicle’s
computer control system.
PCM
– Powertrain Control Module
Pending Code
– A code recorded on the “first trip” for a “two-trip” code.
If the fault that caused the code to be set is not detected on the second
trip, the code is automatically erased.
PID
– Parameter Identification
STFT
– Short Term Fuel Trim, is a program in the vehicle’s computer
designed to add or subtract fuel from the vehicle to compensate for
operating conditions that vary from the ideal A/F ratio. The vehicle uses
this program to make minor fuel adjustments (fine tune) on a short-term
basis.
Trip Drive Cycle
– Vehicle operation that provides the necessary
driving condition to enable a vehicle Monitor to run and complete its
diagnostic testing.
VECI
– Vehicle Emission Control Information Decal
