Glossary “AOC” Definition:
Abnormal Operating Conditions.
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anti-smog device
Glossary “anti-smog device” Definition:
A part or parts designed to reduce or eliminate vehicle exhaust emissions.
anti-squat
Glossary “anti-squat” Definition:
Suspension geometry that will resist a vehicle’s tendency to drop or squat on the rear springs when accelerating.
anti-sway bar
Glossary “anti-sway bar” Definition:
A suspension component, often called a sway bar, intended to prevent side-to-side body movement during turning maneuvers in relation to the axles and wheels.
anti-theft label
Glossary “anti-theft label” Definition:
Identifying label on certain factory installed and replacement parts. Factory intalled parts contain the VIN, Replacement parts contain “R” and “DOT” labels.
anti-theft system
Glossary “anti-theft system” Definition:
Deterrent systems designed to scare off would-be car thieves by sounding alarms and/or disabling the ignition system. Common components used in an automobile anti-theft system include an electronic control module, door switches at all doors, trunk key cylinder switch, hood switch, starter inhibitor relay, horn relay and alarm.
antifreeze
Glossary “antifreeze” Definition:
A chemical solution added to the coolant to prevent freezing; usually ethylene glycol and anticorrosion chemicals. Ethylene glycol resists evaporation, but the anti-corrosion elements in the antifreeze may be depleted in as little as one year, depending on the driving conditions.
antifriction bearing
Glossary “antifriction bearing” Definition:
The term applies to almost any ball-roller or taper-roller bearing.
antilock brake system
Glossary “antilock brake system” Definition:
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 steering control during hard braking and eliminate or reduce the tendency for the vehicle to skid.
anti-siphon system
Glossary “anti-siphon system” Definition:
A small passage in a carburetor to prevent fuel from siphoning from the float bowl into the engine. An air bleed is the most common method used.
anti-skid control
Glossary “anti-skid control” Definition:
Brake system that operates on rear wheels, or all four wheels, to prevent wheel lockup during braking. Braking pressure is reduced to wheel(s) that are about to lock up and skid, by electronic controls.
anti-rust additive
Glossary “anti-rust additive” Definition:
Solution that is added to coolant to retard rust formation inside a cooling system.
anti-seize compound
Glossary “anti-seize compound” Definition:
Thread compound designed to protect threaded connections from damage due to rust or corrosion.
anti-knock additive
Glossary “anti-knock additive” Definition:
Compound that may be added to gasoline to increase its octane, thereby decreasing knock.
anti-knock index
Glossary “anti-knock index” Definition:
The average of the Motor Octane Number (MON) and the Research Octane Number (RON); a measure of fuel’s anti-knock characteristics. (R + M / 2 = Octane Number).
anti-lacerative glass
Glossary “anti-lacerative glass” Definition:
Glass with one or more additional layers of plastic affixed to the inside of the glass.. It gives added protection against shattering and cuts during impact.
anti-lock brake
Glossary “anti-lock brake” Definition:
Braking system that senses the speed of each wheel and, in conjunction with a computer, controls the hydraulic braking pressure, thereby eliminating wheel lockup.
anti-lock brake control module
Glossary “anti-lock brake control module” Definition:
The computer used to control an anti-lock braking system.
anti-rattle hardware
Glossary “anti-rattle hardware” Definition:
Clips, springs, and washers to prevent disc pads or brake shoes from rattling and vibrating.
anti-roll bar
Glossary “anti-roll bar” Definition:
Term for Sway bar