Introduction; Glossary Of Terms And - GM 3123 Manuel Du Propriétaire

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4.1 INTRODUCTION

The Society of Automotive Engineers has issued a Standard
(SAE J1930) for Electrical/Electronic Systems Diagnostic
Terms, Definitions, Abbreviations, and Acronyms. However, at
the present time, this Standard is not in wide use by vehicle
manufacturers.
This Glossary contains definitions for abbreviations and terms
you may find in this manual or in your vehicle service manual.
These definitions may not agree with those contained in SAE
J1930.
4.2 GLOSSARY OF TERMS AND ABBREVIATIONS
A/C – Air Conditioning.
AAC – Auxiliary Air Control Valve.
ABS – Anti-Lock Brake System.
ACC – Air Conditioning Clutch compressor signal input to
computer relating status of air conditioning clutch.
ACCS – Air Conditioning Cycling Switch.
ACD – Air Conditioner Demand switch.
ACT – Air Charge Temperature sensor or signal circuit.
ACV – Thermactor Air Control Valve.
AIR – Air Injector Reaction system, airflow from pump is
directed into engine reduce exhaust emissions.
AIR BPV – Thermactor Air Bypass Valve.
AIS – Automatic Idle Speed circuit and/or motor.
ALDL – Assembly Line Data Link. Diagnostic connector
under dash. Same as ALCL.
AM1 – Thermactor Air Management (TAB).
AM2 – Thermactor Air Management (TAD).
AMBIENT TEMPERATURE – Temperature of air
surrounding vehicle being serviced.
ANTI-BFV – Anti-Backfire Valve.
AOD – Automatic Over Drive transmission.
ATDC – After Top Dead Center.
AVOM – Analog Volt/Ohm Meter.
AWD – All Wheel Drive.
AXOD – Automatic Overdrive transaxle.
AXOD-E – Electronic Automatic Overdrive transaxle.
4-1 GM