Glossary “service bulletin” Definition:
Technical service information provided by the manufacturer, used as updates for the service manuals and to provide the latest service tips, field repairs, product information, and other related information for the service technician.
s
Service Engine Light
Glossary “Service Engine Light” Definition:
Light used to inform the driver of a malfunction in the computer control system
serrated rod cap
Glossary “serrated rod cap” Definition:
Connecting rod cap that has serrated parting edges to help maintain alignment with the rod.
series parallel system
Glossary “series parallel system” Definition:
An arrangement where two 12-volt batteries are connected in such a manner as to provide 24-volts for starting and 12-volts for accessories and charging.
series wound
Glossary “series wound” Definition:
In a starter motor, the field coils (windings) and the armature, are wired in series. All current flows through the field coils, through the hot brushes, through the armature, then to the ground through the ground brushes.
serpentine belt
Glossary “serpentine belt” Definition:
A wide, flat belt having multi-V-grooves to provide friction contact with the pulleys that winds through all of the engine accessories to drive them off the crankshaft pulley.
serrated nut
Glossary “serrated nut” Definition:
Self-locking type of nut having serrations on its contact side to prevent it from loosening when tightened.
serial data
Glossary “serial data” Definition:
The pulse train data signal sent on the communication line between the computer and the scan tool.
series circuit
Glossary “series circuit” Definition:
Circuit having only one path through which the current or fluid can flow, having to pass through one component before going on to another.
series number
Glossary “series number” Definition:
Term used for tire aspect ratio.
series parallel circuit
Glossary “series parallel circuit” Definition:
Circuit in which some components are in series while others are in parallel.
sequentially fired
Glossary “sequentially fired” Definition:
Type of fuel delivery system in which the fuel injectors are fired individually according to ignition firing order and valve timing.
ser
Glossary “ser” Definition:
Acronym form of Serial, or Series, or Service
sequential injection
Glossary “sequential injection” Definition:
Fuel injection system where the injectors fire from individual drivers, in the same sequence as the engines firing order.
sequential logic circuits
Glossary “sequential logic circuits” Definition:
A flip-flop circuit in which the output is determined by the sequence of inputs. A given input affects the output produced by the next input
sequential-port fuel injection (SPFI)
Glossary “sequential-port fuel injection (SPFI)” Definition:
Type of multi-port injection system where individual fuel injectors are pulsed sequentially, one after another in the same firing order as the spark plugs, rather than being pulsed simultaneously. This allows more precise fuel control for lower emissions and better performance. Also known as sequential fuel injection.
separator pulse
Glossary “separator pulse” Definition:
A pulse code consisting of a signal half-second pulse between the last service code and the first continuous code of a data stream
sequential fuel injection
Glossary “sequential fuel injection” Definition:
Term used for sequential-ported fuel injection.
separator
Glossary “separator” Definition:
1). A tank-like device used to remove liquids from a vapor, such as oil from refrigerant. 2). A nonconductive divider placed between the positive and negative plates of a battery.
separator disc
Glossary “separator disc” Definition:
Metal plates in the multi-plate clutch that separates the friction discs.