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Accelerator Pedal Position Sensor

A device designed to send an electrical signal to the central processing unit relative to the position of the accelerator pedal at any given time.

Accelerator Pump

A pump in the carburetor connected by linkage to the accelerator pedal that momentarily enriches the air-fuel mixture when the accelerator is depressed at low speed.

Accelerometer

An instrument that measures a vehicle's linear or lateral rate of acceleration in g force or feet per second.

Acceptable Weld

A weld that meets all the requirements and the acceptance criteria prescribed by the welding specifications.

Acceptor Element

An impurity which is added to germanium or silicon during the manufacture of semiconductors, to produce a p-type material ( boron or indium ).

Access Fittings

A service port or service valve. Also may refer to an access valve.

Access Slot

An opening that permits access to a device, such as the openings in the backing plates of a brake system that allow access to the star wheel adjuster.

Access Time

The time that is required to retrieve information from a system's memory.

Access Valve

A service port or service valve. Also may refer to an access fitting.

Accidental Ground

A condition that exists when a wire, connected to the positive battery terminal, contacts a grounded metal part of the car.

ACCS

Air conditioning cycling switch.

Accumulator

1. A tank located in the outlet of the evaporator to receive the refrigerant that leaves the evaporator. A component used to store or hold liquid refrigerant in an air-conditioning system. This device is constructed to ensure that no liquid refrigerant enters the compressor. 2. A device that cushions the motion of a clutch and servo action in an automatic transmission. 3. A container that stores hydraulic fluid under pressure. It can be used as a fluid shock absorber or as an alternate pressure source for an ABS system 4. A register or storage location that forms the result of an arithmetic or logic operation. Commonly used when a series of calculations are to be totaled.

Accumulator-Dehydrator

An air conditioner accumulator that includes a desiccant.

Accumulator-Drier

A term often used for accumulator-dehydrator.

Accuracy

The conformity of an indicated value to a value accepted as a standard.

ACCUS

An acronym for the Automobile Competition Committee for the United States.

ACD

Air conditioning demand.

ACE

Automotive computerized equipment.

ACEM

Acronym for Airbag Electronic Control Module (Chrysler).

Acetic Acid

An activator that is used in RTV/silicone sealants to make them more rubber-like in composition.