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Interpolation

A "Connect the dots" processing technique to estimate what a fast waveform looks like based on only a fue sampled points.

Interpole

A small field pole placed between the main field poles and electrically connected in series with the armature of an electric rotating machine.

Interrupter

A device used to block a signal.

Intrinsically Safe

A system that is incapable of releasing sufficient electrical or thermal energy under any condition to cause ignition of a specific hazardous mixture in the atmosphere, even in its most ignitable concentration.

Intrusive Diagnostic Test

Any on-board test run by the PCM which could have an effect on vehicle performance or emissions.

Intrusive Test

This is any on-board test run by the diagnostic management system which will have an effect on the vehicles performance or emission levels.

Inversion Valve

A normally open air valve used primarily in parking and emergency brake systems.

Inverted Start

When cars are started in the reverse order of their qualifying times, in oval-track racing.

Inverter

1. A device used to convert the direct current produced by a fuel cell to alternating current for use at the moter.

Investigation Table

A term used for component location table.

IOD

Ignition off drain a Chrysler term for parasitic load.

IOE

An acronym for intake over exhaust.

Ion

1.An atom or group of atoms having an electrical charge, either positive or negative, resulting from orbiting electrons being removed or added. 2. Any atom with more or less electrons than protons.

Ionic Bond

A primary bond arising from the electrostatic attraction between two oppositely charged ions, such as electrostatic painting.

Ionosphere

Anything in the upper atmosphere above the earth by about 25 miles 130,000 ft.

IP

Instrument panel.

IPC

Instrument panel cluster.

IPM

1. Acronym for Integrated Power Module (Chrysler) 2. Acronym for Instrument Panel Module (GM).

IPS

Idle position switch.

IPTO

Independent power take off.