Actron 9640A manual SFI or Sefi, Solenoid, Torque Converter Clutch, Transmission Control Module

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Glossary

ROM:

Read-Only Memory. Permanent programming information stored inside the PCM, containing the information the PCM needs to operate a specific vehicle model/engine combination.

RPM:

Revolutions Per Minute

SAE:

Society of Automotive Engineers.

Scan Tool:

A device that interfaces with and communicates information on a data link.

SDM:

Sensing and Diagnostic Module

Sensor 1:

A standard term used to identify the location of oxygen sensors. Sensor 1 is located upstream of the catalytic converter. See O2S, Bank 1, Bank 2.

Sensor 2:

A standard term used to identify the location of oxygen sensors. Sensor 2 is located downstream of the catalytic converter. See O2S, Bank 1, Bank 2.

Sensor:

Any device that reports information to the PCM. The job of the sensor is to convert a parameter such as engine temperature into an electrical signal that the PCM can under- stand.

SFI or SEFI:

Sequential Fuel Injection or Sequential Electronic Fuel Injection. A fuel injection system that uses one or more injectors for each cylinder. The injectors are mounted in the intake manifold and are fired individually.

Solenoid:

A device consisting of an electrical coil which when energized, produces a magnetic field in a plunger, which is pulled to a central position. A solenoid may be used as an actuator in a valve or switch.

ST:

Short Term fuel trim.

STS:

Service Throttle Soon

TAC:

Throttle Actuator Control

TBI:

Throttle Body Injection. A fuel injection system having one or more injectors mounted in a centrally located throttle body, as opposed to positioning the injectors close to an intake valve port. TBI is also called Central Fuel Injection (CFI) in some vehicles.

TCC:	B
Torque Converter Clutch
TCM:
Transmission Control Module
TCS:
Traction Control System
TDC:
Top Dead Center. When a piston is at its uppermost position in the cylinder.

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