Alcohol interlocks - Test methods and performance requirements - Part 4: Connection and digital interface between the alcohol interlock and the vehicle

The purpose of this new standard is to define a list of functionalities for a standard connector / interface between the vehicle and the alcohol interlock, which can be used for communication between the vehicle and the alcohol interlock in both directions for information exchange. It specifies the interface for an aftermarket installation of alcohol interlocks

Alkohol-Interlocks - Prüfverfahren und Anforderungen an das Betriebsverhalten - Teil 4: Verbindung und digitale Schnittstelle zwischen dem Alkohol-Interlock und dem Fahrzeug

Diese Europäische Norm legt die Schnittstelle zwischen einem Alkohol-Interlock und einem Fahrzeug für die Nachrüstung fest. Sie beschreibt im Detail die Art der elektrischen Verbindungen, die Zuordnung der elektrischen Verbindungen sowie die Informationen, die zwischen dem Fahrzeug und dem Alkohol-Interlock auszutauschen sind.
Diese Europäische Norm ist sowohl für Alkohol-Interlocks für Programme mit Trunkenheitsfahrern (wie in EN 50436-1) als auch für Alkohol-Interlocks für den allgemein präventiven Einsatz (wie in EN 50436-2) anwendbar.
Diese Europäische Norm richtet sich hauptsächlich an Fahrzeughersteller und an Hersteller von Alkohol-44 Interlocks.
Auf diese Europäische Norm wird in EN 50436-7 verwiesen und sie stellt die Details der darin vorgeschlagenen bevorzugten Datenbus Verbindung bereit.

Ethylotests antidémarrage - Méthodes d'’essais et exigences de performance - Partie 4: Connexion et interface numérique entre l'éthylotest antidémarrage et le véhicule

La présente Norme européenne spécifie l'interface des éthylotests antidémarrage destinés à être installés après mise sur le marché. Elle décrit les modes de branchement électrique, l'assignation des lignes de branchement électrique, ainsi que les informations qui doivent être échangées entre le véhicule et l'éthylotest antidémarrage.
La présente Norme européenne est applicable aux éthylotests antidémarrage utilisés dans le cadre des programmes de lutte contre la conduite en état d'ivresse (voir EN 50436-1), ainsi qu'aux éthylotests antidémarrage à usage préventif général (voir EN 50436-2).
La présente Norme européenne s'adresse essentiellement aux fabricants d'éthylotests antidémarrage, ainsi qu'aux constructeurs de véhicules.
La présente Norme européenne est citée en référence dans l'EN 50436-7 et décrit la connexion de bus de données préférée qui est suggérée dans la présente norme.

Alkoholne zapore - Preskusne metode in zahtevane lastnosti - 4. del: Konektor in digitalni vmesnik med alkoholno zaporo in vozilom

Namen tega novega standarda je definirati seznam funkcij za standardni konektor/vmesnik med vozilom in alkoholno zaporo, ki ga je mogoče uporabiti za dvosmerno komunikacijo med vozilom ter alkoholno zaporo za izmenjavo informacij. Podaja vmesnik za namestitev alkoholnih zapor z naknadno vgradnjo.

General Information

Status
Published
Public Enquiry End Date
31-Jan-2018
Publication Date
20-Feb-2019
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
13-Feb-2019
Due Date
20-Apr-2019
Completion Date
21-Feb-2019

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SLOVENSKI STANDARD
SIST EN 50436-4:2019
01-april-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

(WK\ORWHVWVDQWLGpPDUUDJH0pWKRGHVG
HVVDLVHWH[LJHQFHVGHSHUIRUPDQFH3DUWLH
&RQQH[LRQHWLQWHUIDFHQXPpULTXHHQWUHO
pWK\ORWHVWDQWLGpPDUUDJHHWOHYpKLFXOH
Ta slovenski standard je istoveten z: EN 50436-4:2019
ICS:
13.200 3UHSUHþHYDQMHQHVUHþLQ Accident and disaster control
NDWDVWURI
43.040.80 6LVWHPL]D]DãþLWRSULWUNXLQ Crash protection and
VLVWHPL]D]DGUåHYDQMH restraint systems
SRWQLNRY
SIST EN 50436-4:2019 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 50436-4:2019
---------------------- Page: 2 ----------------------
SIST EN 50436-4:2019
EUROPEAN STANDARD EN 50436-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2019
ICS 43.040.10, 71.040.40
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 2018-12-10. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,

Switzerland, Turkey 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

© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 50436-4:2019 E
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SIST EN 50436-4:2019
EN 50436-4:2019 (E)
Contents Page

European foreword ................................................................................................................................. 4

Introduction ............................................................................................................................................. 5

1 Scope ............................................................................................................................................. 6

2 Normative references................................................................................................................... 6

3 Definitions ..................................................................................................................................... 6

4 Connection between alcohol interlock and vehicle .................................................................. 7

4.1 Installation document ................................................................................................................... 7

4.2 Data bus specification .................................................................................................................. 7

4.3 Behaviour of the vehicle ............................................................................................................... 7

4.4 Properties of a connector ............................................................................................................. 8

5 Basic connection architecture for the data bus ........................................................................ 8

6 Communication ............................................................................................................................ 9

6.1 General ......................................................................................................................................... 9

6.2 The communication states of the vehicle ..................................................................................... 9

6.2.1 General ......................................................................................................................... 9

6.2.2 The vehicle communication state Protocol Validation .................................................. 9

6.2.3 The vehicle communication state Set Mode ...............................................................10

6.2.4 The vehicle communication state Unset Mode ...........................................................10

6.2.5 The vehicle communication state Shutdown ..............................................................10

6.2.6 Transitions from Unset Mode to Set Mode .................................................................10

6.3 The communication states of the alcohol interlock ....................................................................11

6.3.1 General .......................................................................................................................11

6.3.2 The alcohol interlock communication state Activated .................................................11

6.3.3 The alcohol interlock communication state Protocol Validation .................................11

6.3.4 The alcohol interlock communication state Service Information ................................12

6.3.5 The alcohol interlock communication state Warm Up ................................................12

6.3.6 The alcohol interlock communication state Test Request ..........................................12

6.3.7 The alcohol interlock communication state Analysing ................................................13

6.3.8 The alcohol interlock communication state Result .....................................................13

6.3.9 The alcohol interlock communication state Wait Ignition ............................................13

6.3.10 The alcohol interlock communication state Idle ..........................................................14

6.3.11 The alcohol interlock communication state Lockout ...................................................14

6.3.12 The alcohol interlock communication state Service ....................................................15

6.3.13 The alcohol interlock communication state Error ........................................................15

6.4 Interaction between vehicle and alcohol interlock ......................................................................15

7 LIN implementation of the communication states ..................................................................15

7.1 General .......................................................................................................................................15

7.2 Identifier ......................................................................................................................................15

7.3 Coding of data bus signals .........................................................................................................16

7.3.1 General .......................................................................................................................16

7.3.2 Vehicle to alcohol interlock .........................................................................................16

7.3.3 Alcohol interlock to vehicle .........................................................................................16

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SIST EN 50436-4:2019
EN 50436-4:2019 (E)

7.3.4 Alcohol interlock status frame .....................................................................................17

7.4 Signal Validation and error handling ..........................................................................................17

7.5 LIN services ................................................................................................................................17

7.5.1 Assign Frame identifier ...............................................................................................17

7.5.2 LIN Product identification of interlock system .............................................................17

7.5.3 Generic integration into vehicle ..................................................................................17

7.5.4 Configuration...............................................................................................................20

8 Communication states and corresponding LIN messages....................................................20

8.1 Vehicle communication states and corresponding frames.........................................................20

8.1.1 Protocol Validation ......................................................................................................20

8.1.2 Set Mode .....................................................................................................................21

8.1.3 Unset Mode .................................................................................................................21

8.1.4 Shutdown ....................................................................................................................22

8.2 Interlock communication States and corresponding Frames .....................................................22

8.2.1 Coding of the blocking state and the non-blocking state indication............................22

8.2.2 Interlock Message Response: ...........................................................22

8.2.3 Interlock Message Response: ...................................22

8.2.4 Interlock Message Response: ....................................23

8.2.5 Interlock Message Response: .............................................................23

8.2.6 Interlock Message Response: ..................................................23

8.2.7 Interlock Message Response: ..........................................................23

8.2.8 Interlock Message Response: .................................................................24

8.2.9 Interlock Message Response: ....................................................24

8.2.10 Interlock Message Response: .......................................................................25

8.2.11 Interlock Message Response: ..............................................................25

8.2.12 Interlock Message Response: ...............................................................25

8.2.13 Interlock Message Response: ..................................................................25

9 System safety analysis ..............................................................................................................26

Annex A (informative) Examples of vehicle – alcohol interlock interactions ...............................27

Annex B (informative) State Transition tables .................................................................................36

Annex C (informative) System safety analysis ................................................................................38

Annex D (informative) Example for a LIN 2.0 description file .........................................................41

Annex E (informative) Example for a LIN 2.2 description file .........................................................45

Annex F (informative) LIN conformance testing ..............................................................................49

Bibliography ..........................................................................................................................................50

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SIST EN 50436-4:2019
EN 50436-4:2019 (E)
European foreword

This document (EN 50436-4:2019) 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) 2019-12-10
implemented
at national level by publication of an identical
national standard or by endorsement
• latest date by which the national standards conflicting (dow) 2021-12-10
with this document have to be withdrawn

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.

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SIST EN 50436-4:2019
EN 50436-4:2019 (E)
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 European Standard series

EN 50436 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 shall not interfere with the proper performance of the vehicle,

shall not impair the safety and security of the vehicle, and shall 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 shall detail all the information that they will use/send. All used

data/information shall 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 shall be defined clearly and not be

transferred outside the vehicle if this digital communication is used.
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SIST EN 50436-4:2019
EN 50436-4:2019 (E)
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 standard describes the information exchange using a LIN 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 50436-2:2014, 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
ISO 17987:2016 (series), Road vehicles – Local Interconnect Network (LIN)
ISO 26262 (series), Road vehicles – Functional safety
3 Definitions

For the purposes of this document, the terms and definitions given in EN 50436-1:2014 and

EN 50436-7:2016 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
motor
motor includes combustion engine, electric motor or hybrid power unit
3.2
odometer
instrument that indicates distance travelled by the vehicle
3.3
passed breath test

breath test for which the user provided an accepted breath sample having a breath alcohol

concentration below the breath alcohol concentration limit
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SIST EN 50436-4:2019
EN 50436-4:2019 (E)
3.4
failed breath test

breath test for which the user did not provide an accepted breath sample or has provided an accepted

breath sample with an alcohol concentration equal to or above the breath alcohol concentration limit

3.5
lockout

condition in which the alcohol interlock will not accept a breath test and thereby prevents the user from

starting the vehicle motor for a predetermined period of time
Note 1 to entry: Lockout may be required by regulatory requirements
3.6
Local Interconnect Network
LIN

serial network protocol used for digital communication between components in vehicles

3.7
LIN Description File
LDF

file that is created in the LIN cluster design and parsed in the LIN cluster generation or by debugging

tools

Note 1 to entry: It contains LIN nodes, signals, frames and schedule table and other parameters relevant for

LIN communication in a LIN network.
4 Connection between alcohol interlock and vehicle
4.1 Installation document

The installation of an alcohol interlock shall be described in an installation document according to

EN 50436-7.
4.2 Data bus specification

The information exchange between the alcohol interlock and the vehicle shall be performed via a LIN

data bus.
The LIN master is on the vehicle side.
The alcohol interlock system shall act as a LIN slave.

The LIN Master and the interlock as a LIN slave shall conform to at least one of the following

specifications: LIN Revision 2.0, LIN revision 2.1, LIN revision 2.2, LIN revision 2.2A, LIN according to

ISO 17987:2016 or later.

NOTE For the information exchange between the alcohol interlock and the vehicle a gateway may be used to

adapt to the requested communication standard (LIN). Both the alcohol interlock and gateway are handled in the

following standard as single units.
4.3 Behaviour of the vehicle

The vehicle shall not enable the start of the motor if it receives the information that the interlock is in

the blocking state or communication to the interlock is not possible or not plausible/unexpected.

The vehicle shall not cause a running vehicle motor to stop, even in the case of receiving a blocking

information from the interlock after a missed or a failed retest.
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SIST EN 50436-4:2019
EN 50436-4:2019 (E)
4.4 Properties of a connector

If the vehicle provides a connector at the end of cable harnesses or another specific location for the

connection to the alcohol interlock, the connector shall have at least 3 connections with the

assignments given in Table 1.

The exact type of the connector and pinout shall be specified in the installation document according to

EN 50436-7.
Table 1 — Minimum pin assignment of a connector
Pin Purpose Details
1 Battery feed of the +9 V to + 36 V
alcohol interlock
battery feed (terminal +30)
as specified in Annex C of EN 50436-7:2016 with the exception
that the alcohol in low power consumption mode shall not require a
current of more than 1 mA.
2 Ground for the voltage 0 V
supply of the alcohol
ground (terminal −30)
interlock and
data bus ground
3 Data bus high LIN High (ISO 17987 (series))

NOTE 1 The sequence of pin numbering is arbitrary and for counting reasons only, e.g. lines are not necessarily

in adjacent cavities. The exact pin numbering is specified in the installation document according to

EN 50436-7:2016, Annex C, 3c.

NOTE 2 Pin 2 can be separated into two independent pins within a 4 pin connector.

5 Basic connection architecture for the data bus

There are two basic options for the connection architecture between the vehicle and the alcohol

interlock.
a) Direct connection to the LIN bus of the vehicle or

b) Indirect connection to a gateway to the LIN bus of the vehicle or a LIN gateway to any bus used in

the vehicle (e.g. CAN).
The specifications of 4.2 apply.
A direct connection is shown in Figure 1.
Figure 1 — Direct connection
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SIST EN 50436-4:2019
EN 50436-4:2019 (E)

An indirect connection with a LIN interface is shown in Figure 2. The LIN interface is proprietary to the

vehicle manufacturer. In this kind of connection, the alcohol interlock is a LIN-slave connected to a LIN

gateway.
Figure 2 — Indirect connection with a LIN interface
6 Communication
6.1 General

The communication between the vehicle and the alcohol interlock shall use communication states.

Respective state transition tables are provided in Annex B.
6.2 The communication states of the vehicle
6.2.1 General
The vehicle shall have the following communication states:
a) Protocol Validation;
b) Set Mode;
c) Unset Mode;
d) Shutdown.
6.2.2 The vehicle communication state Protocol Validation

The vehicle shall be in the communication state if it requests the

protocol validation from the alcohol interlock. The communication state

shall be the initial communication state of the vehicle. The additional entry action is that the vehicle

requests a protocol validation from the alcohol interlock.
The exit actions are:
a) the alcohol interlock has successfully validated the protocol;
b) the vehicle shuts down.

The vehicle shall not allow the driver to start the motor if the vehicle is in the communication state

.
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SIST EN 50436-4:2019
EN 50436-4:2019 (E)
6.2.3 The vehicle communication state Set Mode

The vehicle shall be in the communication state when the vehicle is in a state in which

it cannot be driven normally under its own power. This state shall last until a passed initial breath test

has been provided.
The entry actions are:

a) the interlock has authenticated itself and the vehicle cannot be driven normally under its own

power;
b) transitions in accordance to 6.2.6.
The exit actions are:
c) the vehicle shuts down;
d) the motor was started.
6.2.4 The vehicle communication state Unset Mode

The vehicle shall be in the communication state when the vehicle is in the state in

which it can be driven normally under its own power. The entry action is that the motor has started.

The exit actions are:
a) the vehicle shuts down;
b) transitions in accordance to 6.2.6.
6.2.5 The vehicle communication state Shutdown

The vehicle shall feature the communication state . The entry action is that the vehicle

is requesting the alcohol interlock to shut down. The exit action is that the vehicle ends its shut down

procedure.
6.2.6 Transitions from Unset Mode to Set Mode

The vehicle shall enter in the communication state without supplementary action from

the driver by at least one of the following means:

a) at rotation of the ignition key into the “0” position in the ignition lock or equivalent and activation of

a door; in addition, vehicles that enter the communication state immediately

before or during the normal starting procedure of the vehicle are permitted to enter the

on turning the ignition off;

b) at a maximum of 1 min after the motor has turned off and is not in stop while the vehicle is

stationary.

If there is no ignition key the equivalent to the rotation of the ignition key into the “0” position shall be

described in the installation document according to EN 50436-7.

Within the transition period from UNSET to SET, changing ignition states without starting the motor

shall not affect the timers or conditions.
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SIST EN 50436-4:2019
EN 50436-4:2019 (E)
6.3 The communication states of the alcohol interlock
6.3.1 General
The alcohol interlock shall have the following communication states:
a) Activated;
b) Protocol Validation;
c) Service Information;
d) Warm Up;
e) Test Request;
f) Analysing;
g) Result;
h) Wait Ignition;
i) Idle;
j) Lockout;
k) Service;
l) Error.
6.3.2 The alcohol interlock communication state Activated
The alcohol interlock shall feature the communication state .
The entry action is that the alcohol interlock is activated.

The exit action is that the alcohol interlock receives the vehicle message request

.

The communication state shall be the initial communication state of the alcohol

interlock.
6.3.3 The alcohol interlock communication state Protocol Validation

The alcohol interlock shall feature the communication state .

In the communication state the alcohol interlock shall transmit protocol

related information.

The entry action is the reception of the vehicle message request .

The exit action is the vehicle message request under the condition that the protocol

version is supported.

If the protocol is not supported, the alcohol interlock shall stay in its communication state

.

NOTE According to 6.3.10 the alcohol interlock always transits into the communication state after

leaving the communication state .
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SIST EN 50436-4:2019
EN 50436-4:2019 (E)
6.3.4 The alcohol interlock communication state Service Information

The alcohol interlock shall feature the communication state .

In the communication state the alcohol interlock transmits service

related information.

The entry action is that the alcohol interlock needs to send service information.

The exit actions are:
a) the alcohol interlock has sent the service information;
b) the alcohol interlock receives the request.

NOTE According to 6.3.10 the alcohol interlock always transits into the communication state after

leaving the communication state .
6.3.5 The alcohol interlock communication state Warm Up
The alcohol interlock shall feature the communication state .

In the communication state the alcohol interlock transmits that it is preparing for a

breath test.

The entry action is that the interlock communicates that it is preparing for a breath test.

The exit actions are:
a) that the alcohol interlock is prepared for a breath test;
b) an error not related to a breath sample occurs;
c) the alcohol interlock receives the request.

NOTE Alcohol interlocks that do not need a preparation period cannot enter the communication state

.
6.3.6 The alcohol interlock communication state Test Request
The alcohol interlock shall feature the communication state .

In the communication state the alcohol interlock requests a breath test.

The entry actions are:
a) the request of an initial test;
b) the request of a retest.
The exit actions are:
c) a breath sample was provided;
d) the expiration of the test request period;
e) an error related to a breath sample occurs;
f) an error not related to a breath sample occurs;
g) the alcohol interlock receives the request.
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SIST EN 50436-4:2019
EN 50436-4:2019 (E)
6.3.7 The alcohol interlock communication state Analysing
The alcohol interlock shall feature the communication state .
In the communication
...

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