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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.
ISO 9141:
International Standards Organization OBDII communication mode, used by Chrysler
and most foreign cars. One of three hardware layers defined by OBD II
J1850PWM:
(Pulse Width Modulated) SAE-established OBD II communication standard used by
Ford domestic cars and light trucks. One of three hardware layers defined by OBD II
J1850VPW:
(Variable Pulse Width Modulated) SAE-established OBD II communication standard
used by GM cars and light trucks. One of three hardware layers defined by OBD II
J1962 – SAE:
established standard for the connector plug layout used for all OBD II scan tools
J1978 – SAE:
established standard for OBD II scan tools
J1979 – SAE:
established standard for diagnostic test modes
J2012 – SAE:
established standard accepted by EPA as the standard test report language for
emission tests
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. Turn the ignition key to on, but don’t start engine.
KOER:
Key On Engine Running. Start the vehicle.
LCD:
Liquid Crystal Display
LTFT:
Long Term Fuel Trim