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Antifriction Bearing

The term applies to almost any ball-roller or taper-roller bearing.

Antilock Brake System

1. A service brake system that modulates hydraulic pressure to one or more wheels as needed to keep those wheels from locking during braking. An antilock brake system can improve vehicle control during hard braking and eliminate or reduce the tendency for the vehicle to skid. 2. A term often used for anti-lock brake.

Antimony

A metal added to non-maintenance-free of hybrid battery grids to add strength.

Antique

Any automobile built before 1930.

Antique Auto Racing Association (aara)

An association of persons interested in the history of auto-racing; preserving, restoring, and driving antique race cars.

Antique Automobile Club Of America (aaca)

An association of collectors, hobbyists, and others interested in the preservation, maintenance, and restoration of antique automobiles.

Antitheft Device

A device or system that prevents illegal entry or driving of a vehicle.

Antivirus Program

A software utility that searches disk drives for viruses and removes any that are found.

AO

An acronym for Approval Order.

AOC

An acronym for abnormal operating conditions.

AOD

Automatic over drive.

AOSIM

Acronym for Airbag On/Off Switch Indicator Module (Chrysler).

AP

Atmospheric pressure or air pump.

AP-ACV

Air pump-air control valve.

AP-AMV

Air pump-air management valve.

AP-ASS

Air pump-air switching solenoid.

AP-ASV

Air pump-air switching valve.

AP-BPV

Air pump-by pass valve.

AP-DCTO

Air pump-dual coolant temperature override.

AP-DV

Air pump-diverter valve.