Jaguar XJ (X350). Manual — part 20

Intake Air

Temperature

Sensor

IAT Sensor

Device used to measure IAT

Intake Air

Temperature

Sensor Ignition

IAT Sensor

Ignition

Thermistor which signals the ECM to

retard the ignition timing in response to

high inlet air temperatures

Intake Air

Temperature

Sensor Injection

IAT Sensor

Injection

Thermistor which inputs air density

information to the ECM

Internal diameter

i.dia

International

Standards

Organisation

ISO

Kilogramme (mass)

kg

Kilogramme (force)

kgf

Kilogramme force

per square

centimeter

kgf/cm²

Kilometer

km

Kilometer per hour

km/h

Kilopascal

kPa

Kilovolt

kV

Knock Sensor

KS

Sensor which detects the onset of

detonation, and signals the ECM to

retard the ignition

Left-hand

LH

Left-hand drive

LHD

vehicle

Left-hand thread

LHthd

Liquid Crystal

Display

LCD

Optical digital display system, applied

voltage to which varies the way the

crystals reflect light, thereby modifying

the display

Litre

L

Low Tension

LT

Primary circuit of the ignition system,

linking the battery to the primary

winding in the ignition coil

Malfunction

Indicator Lamp

MIL

A required on-board indicator to alert

the driver of an emission related

malfunction

Manifold Absolute

Pressure

MAP

Absolute pressure of the intake

manifold air

Manifold Absolute

Pressure Sensor

MAP Sensor

Sensor located in the ECM and ported

to the intake manifold

Manifold Surface

Temperature

MST

Mass Air Flow

MAF

System which provides information on

the mass flow rate of the intake air to

the engine

Mass Air Flow

Sensor

MAF Sensor

Hot-wire sensor which monitors air flow

into the intake manifold for fueling and

ignition control

Maximum

max.

Meter

(measurement)

m

www.

Metric (screw

thread, e.g. M8)

M

Microfarad

MFD

Unit of electrical capacitance, one

millionth of a farad

Millimeter

mm

Millimeter of

mercury

mmHg

Millisecond

ms

Minimum

min.

Minute

minute

Model year

MY

Motorized In-Car

Aspirator

MIA

Device which constantly samples cabin

temperature by passing air over a

sensor, and communicates with the

A/CCM to modify A/C system

performance to suit

Multi Protocol

Adapter

MPA

An interpreter for the various data

languages present on a vehicle

National Institute of

Occupational

Safety and Health

(US)

NIOSH

Newton

N

SI unit of force. 1 N = 0.2248 pounds

force

Newton Meter

Nm

SI unit of torque. Must not be confused

with nm (nanometer)

Nox

Compounds of nitrogen and oxygen

formed at high temperatures. Major

source of exhaust-gas air pollution

Non-Volatile

Random Access

Memory

NVRAM

RAM which retains memory even if

power supply is interrupted

Normally aspirated

N/A

Fueling system using intake air at

atmospheric pressure; not

supercharged or turbocharged

Normally Closed

NC

Normally Open

NO

North American

Specification

NAS

Vehicles for sale in the USA and

Canadian markets

Number

No.

Occupational

Safety and Health

Administration (US)

OSHA

On-Board

Diagnostic

OBD

A system that monitors some or all

computer input and output control

signals. Signal(s) outside the pre-

determined limits imply a fault in the

system or a related system

Original Equipment

Manufacturer

OEM

Outside Diameter

o. dia

Oxides of nitrogen

Nox

Oxygen Sensor

O2S

A sensor which detects oxygen content

in the exhaust gases

Parameter

Identification

PID

An index number referring to a

parameter within a module without

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