Equus 3123 - GM Code Reader (1982 - 1995) Instrukcja Użytkownika Pobierz pdf (Strona 45)

Glossary

GM 4-6

HPA - High Pressure Accumulator.

IAC – Idle Air Control.

IAS – Inlet Air Solenoid valve or its circuit.

IAT – Intake air temperature sensor, performs same function

as MAT sensor.

ICM – Integrated Control Module.

IDLE TRACKING SWITCH – An input device that sends a

signal to the computer to indicate a closed throttle condition.

IGN – Ignition.

INTERMITTENT FAULT – Fault which occurred during a

previous engine operating cycle. Intermittent fault may have

set a fault code which is still present in PCM memory.

ISA – Idle Speed Actuator. Extends or retracts to control

engine idle speed and to set throttle stop angle during

deceleration.

ISC – Idle Speed Control, either computer control motor, air

bypass valve, or any device used to control idle rpm.

ISO VALVE - Isolation Valve.

ITS – Idle Tracking Switch.

KAM – Keep Alive Memory. Battery power memory locations

in computer used to store failure codes and some diagnostic

parameters.

KAPWR – Keep Alive Power, used to power KAM circuit of

the processor.

KNOCK SENSOR (KS) – Input device that responds to spark

knock, caused by over advanced ignition timing.

LEAN MIXTURE – Air/fuel mixture that has excessive

oxygen left after all fuel in combustion chamber has burned, 1

part fuel to 15 or more parts air.

LED – Light Emitting Diode.

LOCK UP TORQUE CONVERTER – Converter with

internal mechanism that locks turbine to impeller when

engaged.

LPA - Low Pressure Accumulator.

LUS – Lock-Up Solenoid.

M/C – Mixture control or mixture control solenoid.

MAF – Mass Air Flow sensor, used to measure amount of

airflow through the throttle body.

MAP – Manifold Absolute Pressure sensor or its circuit.

MAT – Manifold Air Temperature.

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Equus 3123 - GM Code Reader (1982 - 1995) Instrukcja Użytkownika Strona 45