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Freedom Of Information Act

A federal law giving everyone the right to certain information.

Freewheeling

A mechanical device in which a driving member imparts motion to a driven member in one direction, but not the other.

Freeze

To stop a waveform display for closer examination only possible on a digital oscilloscope.

Freeze Crack

A crack in the engine caused by expansion due to coolant freezing.

Freeze Frame

1. Operating conditions which are stored in the memory of the PCM at the instant a DTC is stored and the MIL is illuminated. A Freeze Frame is stored for only one DTC and can only be overwritten under certain conditions. 2. A "snapshot" of engine operating conditions taken when a fault occurs. Normally containing such information as engine RPM, throttle position, engine load, vehicle speed, coolant temperature, and loop status.

Freeze Plug

A term used for core plug.

Freeze Protection

1. The controlling of evaporator temperature so that moisture on its surface does not freeze an block the airflow. 2. An additive added to coolant to prevent freeze-up by lowering its freezing temperature.

Freeze-up

1. Failure of a unit to operate properly due to the formation of ice at the metering device. 2. A term used for seize.

French Seam

A fabric seam in which the edge of the material is tucked under and sewn on the inner side.

Frenched

A body part, normally separate, having been molded together with another body part.

Freon

Registered trademark of E.I. duPont, for a group of its refrigerants.

Freon 12

The trade term for refrigerant-12 by E.I. duPont.

Frequency

[1]The number of occurrences of an interactive happening per unit of time. [2]The number of complete cycles an alternating electric current, sound wave, or vibrating or rotating object undergoes in one second.

Frequency Response

A bode point of input to output response of an amplifier of attenuator for sine waves with constant amplitudes at different frequencies over a frequency range.

Frequency Response

The usable spectrum of sound frequency reproduced by a speaker, amplifier, head unit or other sound system component. For example, CD players typically reproduce frequencies from 10 Hertz to 20,000 Hz. Better units can reproduce frequencies above and below this range, meaning they offer a wider sound spectrum.

Frequency Valve

A valve that is used to stabilize the air/fuel mixture on a fuel-injected engine.

Friction

The resistance to motion of two items in contact with each other.

Friction Ball Joint

A term used for non-load-carrying ball joint.

Friction Bearing

A bearing in which there is a sliding contact between the moving surfaces, such as a connecting rod bearing.

Friction Disk

A flat disc surfaced with a friction material on one or both sides, such as a clutch disk.