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Automotive Acronyms D

Acronym Definition Notes / What Is / Who Is
dB decibels Measurement of sound
DC direct current Flows in one direction. Usually 12 volts for automotive applications.
DEQ Department of Environmental Quality A national or state regulatory agency whose job is to protect the quality of the environment.
DFCO Deceleration fuel cut-off A computer command / unit that shuts fuel off to the engine while in gear to improve gas mileage
DFI direct fuel injection Injects fuel directly into each combustion chamber.
DLC data link connector 16 pin connector located under the dash. Where the DTC tester is plugged into.
DMV Department of Motor Vehicles State run department for vehicle registrations, driver licenses, custom plates, road tests, title certificates, license plates, inspection stickers and more.
DOC Department of Commerce Mission is to help make American businesses more innovative in the US and more competitive overseas.
DOHC dual overhead cams Two cam shafts above the valves / pistons of a engine.
DOT Department of Transportation Oversees federal highway, air, railroad, and maritime and other transportation administration functions; components include the FAA, FHA, FRA, NHTSA, OIG, and STB.
DRCV distributor retard control valve Vacuum valve that controls a distributor. Works along with delay, dump and check valves on deceleration and acceleration.
DTC diagnostic trouble code OBD, OBD-II, and OBD2 check engine light codes that translate to a generic or manufacturer specific definition.
DTM diagnostic test mode Multiple types of tests, OBD - up systems.
DVDSV differential vacuum delay and separator valve OBD, OBD-II term
DVDV distributor vacuum delay valve See DRCV
DVOM digital volt ohm meter Hand held tester for voltage and resistance.

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Note: An Acronym is a abbreviation that is formed using the individual letter components in a phrase, name, organization or thing. Listings on this page are used throughout the automotive industry.

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