Glossary “semicentrifugal clutch” Definition:
A clutch having weighted components in the pressure plate, such as rollers or release levers, that apply additional force against the pressure plate to hold the disc tighter during high engine rpm.
s
SEMA
Glossary “SEMA” Definition:
Specialty Equipment Market Association.
semi
Glossary “semi” Definition:
Term for semi-tractor or semi-trailer.
Self-Test Output Connector
Glossary “Self-Test Output Connector” Definition:
Connector from which fault codes are accessed. Generally a six pin connector.
SEL-SW
Glossary “SEL-SW” Definition:
System Selector Switch
Self-Test
Glossary “Self-Test” Definition:
A part of the Ford functional Quick Test diagnostic procedure.
Self-Test Input (STI)
Glossary “Self-Test Input (STI)” Definition:
Circuit used to initiate Self-Test.
Self-Test Input Connector
Glossary “Self-Test Input Connector” Definition:
Connector that when grounded causes self test to be initiated. Generally a single pin connector.
Self-Test Output (STO)
Glossary “Self-Test Output (STO)” Definition:
Circuit which transmits service codes to a scan tool or meter.
self-tapping screw
Glossary “self-tapping screw” Definition:
1). A screw that cuts its own threads without pre-drilling in sheet metal. 2). A screw that cuts its own threads in a predrilled hole in heavy-gauge metal.
self test
Glossary “self test” Definition:
Computer function that scans systems and subsystems to provide data for troubleshooting.
self-sealing tire
Glossary “self-sealing tire” Definition:
Tire having a special compound on the inner surface that seals punctures when the puncturing object is removed.
self-stick sandpaper
Glossary “self-stick sandpaper” Definition:
Sandpaper with adhesive applied to it during manufacturing.
self-locking nut
Glossary “self-locking nut” Definition:
Nut that produces a friction or force fit when threaded onto a bolt or stud.
self-locking screw
Glossary “self-locking screw” Definition:
Screw configured do that it locks itself in place when tightened.
self-etching primer
Glossary “self-etching primer” Definition:
Primer which contains an etching agent, used in place of metal treatment before priming, to provide corrosion protection.
self-induction
Glossary “self-induction” Definition:
Induction of a voltage in a current-carrying coil of wire, such as an ignition coil.
self-darkening filter lenses
Glossary “self-darkening filter lenses” Definition:
Welding filter lens that instantly turns dark when an arc is struck.
self-defrosting glass
Glossary “self-defrosting glass” Definition:
It has a conducting grid or invisible layer that carries electric current to heat the glass.
self-diagnostics
Glossary “self-diagnostics” Definition:
In automotive computers, especially those for engine control, a program which assesses the condition of the system, including the sensors and the computer itself, and communicates its findings to the technician by means of trouble codes.