Actron 9640 user manual Iac, Iat, Icm, Imrc, Ipc, Isc, Iso, Kam, Koeo, Koer, Lcd, Ltft, Maf

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

IAC:

Idle Air Control. A device mounted on the throttle body which adjusts the amount of air bypassing a closed throttle so that the PCM can control idle speed.

IAT:

Intake Air Temperature (Sensor)

ICM:

Ignition Control Module.

IMRC:

Intake Manifold Runner Control

IPC:

Instrument Panel Cluster

ISC:

Idle Speed Control. A small electric motor mounted on the throttle body and controlled by the PCM. The PCM can control idle speed by commanding the ISC to adjust its position.

ISO:

International Organization of Standardization also know as International Standards Organization.

KAM:

Keep Alive Memory

Knock Sensor (KS):

Used to detect engine detonation or “knock.” The sensor contains a piezoelectric element and is threaded into the engine block. Special construction makes the element sensitive only to engine vibrations associated with detonation.

Knock:

Uncontrolled ignition of the air/fuel mixture in the cylinder. Also referred to as detonation or ping. Knock indicates extreme cylinder pressures or “hotspots” which are causing the air/fuel mixture to detonate prematurely.

KOEO:

Key On — Engine Off.

KOER:

Key On — Engine Running.

LCD:

Liquid Crystal Display.

LTFT:

Long Term Fuel Trim.

M/T:

Manual transmission or manual transaxle.

MAF:	B
Mass Air Flow Sensor. Measures the amount and density of air entering the
engine and sends a frequency or voltage signal to the PCM. The PCM uses this
signal in its fuel delivery calculations.

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