Glossary “electronic spark control (ESC)” Definition:
System that controls and governs the vacuum signal to the distributor to assure proper distributor retard/advance under various engine load conditions.

Glossary “electronic spark timing (EST)” Definition:
Electronic system that, based on input signals, provides the correct spark timing for a given engine condition.

Glossary “electronic vibration analyzer (EVA)” Definition:
Electronic tool that senses and displays vibration frequencies and amplitudes.

Glossary “electronic level control (ELC)” Definition:
Device that automatically regulates the ride height of a vehicle under various load conditions.

Glossary “electronic leak detector” Definition:
AC or DC powered leak detector that emits an audible and/or visual signal when its sensor is passed near a refrigerant leak.

Glossary “electronic engine control (EEC)” Definition:
System that regulates the engine management functions.

Glossary “electronic feedback carburetor (EFC)” Definition:
Carburetor that controls the air/fuel mixture according to commands from the engine control computer.

Glossary “electronic fuel control (EFC)” Definition:
Fuel system that used electronic devices to monitor engine functions to ensure that the proper air/fuel ratio reaches the combustion chamber for optimum engine performance under any operating condition.

Glossary “electronic fuel-injection system” Definition:
Fuel injection system that injects gasoline into a spark-ignition engine that includes an electronic control to time and meter the fuel flow.

Glossary “electronic ignition (EI)” Definition:
An ignition system where a solid state device has replaced mechanical breaker points.

Glossary “Electronic Ignition System” Definition:
1). Ignition system that is controlled electronically rather than by mechanical methods. 2). An ignition system controlled by the use of sensors and or signals. 3). J-1930 acronym that indicates that all ignition systems that do not use a distributor are called electronic ignition (EI) systems, while those with distributers will be called distributor ignition (DI) systems whether they have electronic components or points.

Glossary “electronic control unit (ECU)” Definition:
Digital computer that controls engine and transmission functions based on data that it receives from sensors, relative to engine rpm and temperature, air temperature, intake manifold vacuum, exhaust oxygen content and throttle position.

Glossary “electronic controlled ignition (ECI)” Definition:
Term that often applies to an EI system.

Glossary “electronic controlled transmission” Definition:
Transmission that has electronic sensors to monitor throttle position, engine speed, torque converter turbine speed, and other drivetrain operations that effect shifting, leading to fuel economy.

Glossary “electronic cycling-clutch switch” Definition:
Electronic switch that prevents the evaporator from freezing by signaling various electronic control devices when the evaporator reaches a predetermined low temperature.

Glossary “electronic computer advance” Definition:
Uses information available to the computer for the fuel and emission systems to control spark advance.

Glossary “electronic computer control system (ECCS)” Definition:
Term used for electronic control assembly (ECA).

Glossary “electronic control assembly (ECA)” Definition:
Device that receives signals, processes them, makes decisions, and gives commands. More commonly referred to as a computer.

Glossary “electronic control module (ECM)” Definition:
Electronic device used to control some engine functions.

Glossary “electronic control system (ECS)” Definition:
Electronic device used to control certain electrical and engine operations.