EN 50436-4:2022

SLOVENSKI STANDARD
01-september-2022
Nadomešča:
SIST EN 50436-4:2019
Alkoholne zapore - Preskusne metode in zahtevane lastnosti - 4. del: Konektor in
digitalni vmesnik med alkoholno zaporo in vozilom
Alcohol interlocks - Test methods and performance requirements - Part 4: Connection
and digital interface between the alcohol interlock and the vehicle
Alkohol-Interlocks - Prüfverfahren und Anforderungen an das Betriebsverhalten - Teil 4:
Verbindung und digitale Schnittstelle zwischen dem Alkohol-Interlock und dem Fahrzeug
Ethylotests antidémarrage - Méthodes d'essais et exigences de performance - Partie 4:
Connexion et interface numérique entre l'éthylotest antidémarrage et le véhicule
Ta slovenski standard je istoveten z: EN 50436-4:2022
ICS:
13.200 Preprečevanje nesreč in Accident and disaster control
katastrof
43.040.80 Sistemi za zaščito pri trku in Crash protection and
sistemi za zadrževanje restraint systems
potnikov
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50436-4
NORME EUROPÉENNE
EUROPÄISCHE NORM July 2022
ICS 71.040.40; 43.040.10 Supersedes EN 50436-4:2019
English Version
Alcohol interlocks - Test methods and performance requirements
- Part 4: Connection and digital interface between the alcohol
interlock and the vehicle
Ethylotests antidémarrage - Méthodes d'essais et Alkohol-Interlocks - Prüfverfahren und Anforderungen an
exigences de performance - Partie 4: Connexion et das Betriebsverhalten - Teil 4: Verbindung und digitale
interface numérique entre l'éthylotest antidémarrage et le Schnittstelle zwischen dem Alkohol-Interlock und dem
véhicule Fahrzeug
This European Standard was approved by CENELEC on 2022-06-20. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50436-4:2022 E
Contents Page
European foreword . 3
Introduction . 5
1 Scope . 6
2 Normative references. 6
3 Terms and definitions . 7
4 Connection between alcohol interlock and vehicle . 8
4.1 Installation documentation . 8
4.2 Data bus specification . 8
4.3 Properties of a connector . 9
4.4 Behaviour of the vehicle . 10
4.5 Activation of the alcohol interlock . 10
4.6 Deactivation of the alcohol interlock following a shutdown request . 10
4.7 Maintaining power to the alcohol interlock . 11
5 Basic connection architecture for the data bus . 11
6 Communication . 12
6.1 General . 12
6.2 Communication states of the vehicle . 12
6.3 Communication states of the alcohol interlock . 13
6.4 Interaction between vehicle and alcohol interlock . 18
7 Implementation of the communication states . 18
7.1 General . 18
7.2 Coding of data bus signals . 18
7.3 Signal Validation and error handling . 19
7.4 LIN identifiers and services . 20
7.5 CAN-Services . 24
8 Communication states and corresponding messages . 24
8.1 Vehicle communication states and corresponding frames. 24
8.2 Interlock communication states and corresponding frames . 26
9 System safety analysis . 30
10 Testing . 30
Annex A (informative) Examples of vehicle – alcohol interlock interactions . 31
Annex B (informative) State transition tables . 39
Annex C (informative) Hazard Analysis and Risk Assessment in accordance with the
requirements of ISO 26262 . 43
Annex D (informative) Example of a LIN 2.0 description file . 44
Annex E (informative) Example of a LIN 2.2 description file . 47
Annex F (informative) Example of a J 1939 DBC file . 50
Annex G (informative) Conformance testing . 55
G.1 LIN conformance testing . 55
G.2 CAN J1939 conformance testing . 55
Annex H (informative) Proposed test plan . 56
Bibliography . 113

European foreword
This document (EN 50436-4:2022) has been prepared by CLC/BTTF 116-2 “Alcohol Interlocks”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2023-06-20
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2025-06-20
conflicting with this document have to be
withdrawn
This document will supersede EN 50436-4:2019 and all of its amendments and corrigenda (if any).
— Clause 3, terms and definitions, definitions were added for CAN and DBC;
— Clause 4.2, the CAN data bus was added as new data bus connection;
— Clause 4.3.3, the option to switch off the power supply to the alcohol interlock was included;
— Clause 4.5, the activation of the alcohol interlock was specified;
— Clause 4.6, the deactivation of the alcohol interlock was specified;
— Clause 5, the clause was simplified and updated;
— Clause 6, the alcohol interlock communication state Service was deleted;
— Clause 7.5, the specification of CAN services was added;
— Clause 8, the clause was updated and some communication state parameters were updated and
clarified;
— Clause 9, the clause was updated;
— Clause 10, new clause was added to provide a link to the test plan in Annex H;
— Annex A, figures were updated to meet communication states;
— Annex B, tables were updated to meet new transition requirements;
— Annex C, the annex was reworked completely;
— Annex D, the annex was updated;
— Annex E, the annex was updated;
— Annex F, a sample DBC file was added as Annex;
— Annex G, the annex was updated;
— Annex H, the proposed test plan was added as an informative Annex.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Introduction
The purpose of alcohol interlocks is to enhance traffic safety by preventing persons with alcohol
concentrations exceeding a set limit value from driving a motor vehicle. The EN 50436 series specifies
test methods and essential performance requirements for alcohol interlocks and gives guidance for
decision makers, purchasers and users.
There are several areas in which alcohol interlocks may be used:
— installed in a vehicle as a general preventive measure for the promotion of traffic safety, on a
voluntary base or required legally in certain vehicles (e.g. vehicles for children transport), or
— in vehicles as ordered by a court or an administrative authority as part of a drink-driving offender
programme, or
— for persons subject to a medical or rehabilitation programme.
Alcohol interlocks are often intended for after-market installation. For this purpose they have to be
connected to the electrical circuits of the vehicle.
This installation of an alcohol interlock is expected not to interfere with the proper performance of the
vehicle, nor to impair the safety and security of the vehicle; and to be as easy and as fast as possible.
Additionally, the installation costs should be low in relation to the total cost of the alcohol interlock.
Therefore, it is desirable to have a standardised interface between alcohol interlocks and vehicles.
The alcohol interlock suppliers are expected to detail all the information that they will use/send. All used
data/information is expected to respect the cyber security protocol and rules of the vehicle.
NOTE A new standard ISO/SAE 21434 to define requirements for cybersecurity engineering is under
preparation.
All data required by the alcohol interlock from the vehicle is expected to be defined clearly and not be
transferred outside the vehicle if this digital communication is used.
1 Scope
This document specifies the interface between an alcohol interlock for production and aftermarket
installation and a vehicle. It details the modes of electrical connections, the assignment of electrical
connection lines as well as the information to be exchanged between the vehicle and the alcohol
interlock.
This document is applicable to alcohol interlocks for drink-driving-offender programmes (as in
EN 50436-1) as well as to alcohol interlocks for general preventive use (as in EN 50436-2).
This document is mainly directed at manufacturers of alcohol interlocks and at vehicle manufacturers.
This document is referenced in EN 50436-7 and provides details of the preferred data bus connection
suggested therein.
NOTE This document describes the information exchange using a LIN or a CAN (J1939) connection.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 50436-1:2014, Alcohol interlocks — Test methods and performance requirements — Part 1:
Instruments for drink-driving-offender programs
EN 50436-2, Alcohol interlocks — Test methods and performance requirements — Part 2: Instruments
having a mouthpiece and measuring breath alcohol for general preventive use
EN 50436-7:2016, Alcohol interlocks — Test methods and performance requirements — Part 7:
Installation document
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