Glossary “system protective valves” Definition:
Device that is used to protect the brake system against accidental loss of air pressure, buildup of extreme pressure, or backflow and reverse air flow in a truck braking system.
Glossary “system status (I/M readiness status )” Definition:
Signal or code for emission testing which states that all the vehicle’s on-board emissions diagnostics have been run. System status is not concerned whether the emission system passed or failed the test, only that the test was run.
Glossary “systemic approach” Definition:
An organized and logical sequence of steps to accomplish a task or job.
Glossary “system pressure” Definition:
Average operating pressure in a system, such as the fuel-injection system.
Glossary “system pass” Definition:
Indicates that there are no malfunctions of the type that the system can detect and store.
Glossary “system” Definition:
Any set of interacting electrical or mechanical parts that are grouped together to operate as a complete entity.
Glossary “system dependent recovery system” Definition:
Refrigerant recovery system that relies on system components, such as the compressor, to remove the refrigerant from the system.
Glossary “system overcharge” Definition:
Term used for an overcharged A/C system.
Glossary “synfuel” Definition:
Term used for synthetic fuel.
Glossary “synthetic fuel” Definition:
Fuel made by liquefying coal or by extracting oil from shale or tar sands.
Glossary “synthetic lining” Definition:
Brake friction material made from non-organic, non-metallic, and non-asbestos materials. Typically fiberglass and aramid fibers.
Glossary “synthetic oil” Definition:
1). Type of engine lubricant consisting of highly polymerized chemicals. 2). A non-mineral based lubricant for use in automotive air conditioners.
Glossary “syringe” Definition:
A tool with a rubber bulb and a tube or a plunger in a tube; used to suck out or force in a liquid
Glossary “synchronous fuel timing” Definition:
Fuel injectors firing in direct relationship to ingition reference pulses.
Glossary “synchronizer hub” Definition:
Center part of the synchronizer assembly that is splined to the synchronizer sleeve and transmission output shaft.
Glossary “synchronizer sleeve” Definition:
Sliding sleeve that fits over the complete synchronizer assembly.
Glossary “synchronous” Definition:
Condition that exists when two events occur in a specified time relationship with each other, under the control of master timing signals.
Glossary “synchronous belt” Definition:
Belt having cogs or teeth that mesh in mating cogs or teeth of a pulley.
Glossary “synchronizer” Definition:
Device used in a manual transmission to bring a selected gear up or down to the speed of the main shaft.
Glossary “synchronizer assembly” Definition:
Device that uses cone clutches to bring two parts rotating at two speeds to the same speed. Operates between two gears.