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BRITISH STANDARD AUTOMOBILE SERIES

BS AU
206-1 :1 986
ISO 4092:1 984

Diagnostic systems for
road vehicles —
Part 1 : Glossary
[ISO title: Road vehicles — Diagnostic systems for motor
vehicles — Vocabulary]

UD C 62 9 . 1 1 : 62 9 . 0 1 8


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BS AU 206-1 :1 986

Committees responsible for this
British Standard

The preparation of this British Standard was entrusted by the Automobile
Standards Committee (AUE/- ) to Technical Committee AUE/1 6, upon which
the following bodies were represented:
Association of Trailer Manufacturers
Department of Transport (Highways)
Electric Cable Makers’ Confederation
Institution of Electronic and Radio Engineers

National Caravan Council Limited
Society of Motor Manufacturers and Traders Limited

This British Standard, having
been prepared under the
direction of the Automobile
Standards Committee, was
published under the authority
of the Board of BSI and
comes into effect on

Amendments issued since publication

28 February 1 986
© BSI 02- 2000

The following BSI references
relate to the work on this
standard:
Committee reference AUE/1 6
Draft for comment 83/72986 DC

ISBN 0 5 80 1 5 0 38 0

Amd. No.

Date of issue

Comments



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BS AU 206-1 :1 986

Contents

Committees responsib le

© BSI 02 - 2 000

Inside front cover

Page

National foreword
ii

1
Scope and field of application
1

2
Terms and definitions
1

i


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BS AU 206-1 :1 986

National foreword

This Part of BS AU 206 has been prepared under the direction of the Automobile

Road vehicles —
Diagnostic systems for motor vehicles — Vocabulary” published by the

Standards Committee and is identical with ISO 4092: 1 984 “
International Organization for Standardization (ISO).

Terminology and conventions. The text of the International Standard has

been approved as suitable for publication as a British Standard without
deviation. Some terminology and certain conventions are not identical with those
used in British Standards; attention is drawn especially to the following.
Wherever the words “International Standard” appear, referring to this standard,
they should be read as “British Standard”.
A British Standard does not purport to include all the necessary provisions of a
contract. Users of British Standards are responsible for their correct application.
Compliance with a British Standard does not of itself confer immunity
from legal obligations.

Summary of pages

This document comprises a front cover, an inside front cover, pages i and ii,
pages 1 and 2 and a back cover.
This standard has been updated (see copyright date) and may have had

amendments incorporated. This will be indicated in the amendment table on the
inside front cover.

ii

© BSI 02- 2000


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BS AU 206-1 :1 986

1 Scope and field of application
This International Standard defines terms relating

2.6
test equipment

to diagnostic systems for motor vehicles.

devices used to carry out a test. Test equipment is

2 Terms and definitions

2.6.1

not necessarily a tester of symptoms

2.1
diagnosis


the determination of the cause of malfunction of a
road vehicle
2.2
monitoring (of motor vehicle systems)

the surveillance of a motor vehicle system or
component during operation
2.3
inspection

the observation or measurement of an item, or
characteristic of an item, and comparison of the
observation(s) with pre- established standards
2.4
specification for diagnosis

a description of a device or system that defines in
detail its functional performance capabilities, and
the installation, environmental and operational
requirements or limitations
2.5
test

a procedure or action taken to compare, under real
or simulated conditions, parameters of a system or
component against specified performance and/or
values
2.5 .1
limits


the set of values that describes the established
boundaries of acceptance. The same characteristics

diagnostic system

a system of measurement and interpretation for the
purpose of diagnosis
2.6.1 .1
diagnostic sensor

any sensing device used partly or exclusively for
diagnostic purposes to provide information on
conditions of a motor vehicle or parts of it
2.6.1 .1 .1
built-in diagnostic sensor

a sensor for diagnostic purposes which is part of the
permanent equipment of a motor vehicle
2.6.1 .1 .2
plug-in diagnostic sensor

a sensor for diagnostic purposes which is part of the
off- vehicle diagnostic equipment, to be fitted, prior
to diagnosis, to a receiving device already provided
on the motor vehicle for this purpose
2.6.1 .1 .3
clip-on diagnostic sensor

a sensor for diagnostic purposes which is part of the

off- vehicle diagnostic equipment, to be attached to
the motor vehicle prior to diagnosis. No special
on- vehicle equipment is necessary
2.6.1 .1 .4
crankshaft position sensor

a sensor producing one or more defined electrical
signals each representing a specified crankshaft
position

may have several sets of limits depending upon the

2.6.1 .1 .5

time or basis of establishing acceptance (for example

reference cylinder sensor

new parts limits, overhaul limits and safety limits)

a sensor for diagnostic purposes, the signal of which

2.5 .2

corresponds to the beginning of the reference

total failure

cylinder ignition pulse in the case of spark ignition


the termination of the ability of a device to perform
its required function
2.5 .3
partial failure

a failure resulting from deviation(s) in
characteristic(s) beyond specified limits, but not
such as to cause complete lack of the required
function
2.5 .4
symptom (for diagnosis)

an observed or measured characteristic leading to a

engines. In the case of compression ignition engines,
it is a sensor which produces a signal which relates
to the beginning of the inj ection of the reference
cylinder. This relationship depends on the type of
sensor and the measuring principle
2.6.2
off-vehicle equipment (for diagnosis)

all off- vehicle devices for diagnostic purposes
2.6.3
on-vehicle equipment (for diagnosis)

all on- vehicle devices for diagnostic purposes

diagnosis


© BSI 02- 2000

1


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BS AU 206-1 :1 986

2.6.4

2.6.5

connecting devices (for diagnosis)

diagnostic tester

on- or off- vehicle devices for the necessary

off- vehicle equipment with diagnostic capability

mechanical and/or electrical connections between
the motor vehicle and the diagnostic equipment

2

© BSI 02- 2000


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blank


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BS AU
206-1 :1 986
ISO 4092:1 984

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