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.
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system status (I/M readiness status )
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.
systemic approach
Glossary “systemic approach” Definition:
An organized and logical sequence of steps to accomplish a task or job.
system pressure
Glossary “system pressure” Definition:
Average operating pressure in a system, such as the fuel-injection system.
system overcharge
Glossary “system overcharge” Definition:
Term used for an overcharged A/C system.
system pass
Glossary “system pass” Definition:
Indicates that there are no malfunctions of the type that the system can detect and store.
system
Glossary “system” Definition:
Any set of interacting electrical or mechanical parts that are grouped together to operate as a complete entity.
system dependent recovery system
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.
synfuel
Glossary “synfuel” Definition:
Term used for synthetic fuel.
synthetic fuel
Glossary “synthetic fuel” Definition:
Fuel made by liquefying coal or by extracting oil from shale or tar sands.
synthetic lining
Glossary “synthetic lining” Definition:
Brake friction material made from non-organic, non-metallic, and non-asbestos materials. Typically fiberglass and aramid fibers.
synthetic oil
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.
syringe
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
synchronous fuel timing
Glossary “synchronous fuel timing” Definition:
Fuel injectors firing in direct relationship to ingition reference pulses.
synchronizer hub
Glossary “synchronizer hub” Definition:
Center part of the synchronizer assembly that is splined to the synchronizer sleeve and transmission output shaft.
synchronizer sleeve
Glossary “synchronizer sleeve” Definition:
Sliding sleeve that fits over the complete synchronizer assembly.
synchronous
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.
synchronous belt
Glossary “synchronous belt” Definition:
Belt having cogs or teeth that mesh in mating cogs or teeth of a pulley.
synchronize
Glossary “synchronize” Definition:
To cause two or more events to operate at the same time and/or the same speed.
synchronizer
Glossary “synchronizer” Definition:
Device used in a manual transmission to bring a selected gear up or down to the speed of the main shaft.