# Commission Delegated Regulation (EU) 2017/654 of 19 December 2016 supplementing Regulation (EU) 2016/1628 of the European Parliament and of the Council with regard to technical and general requirements relating to emission limits and type-approval for internal combustion engines for non-road mobile machinery, Division 1.1

Extent: E+W+S+N.I.

For the purposes of this Annex, the following definitions and abbreviations apply:
(1) ‘diagnostic trouble code (“DTC”)’ means a numeric or alphanumeric identifier which identifies or labels a NCM and/ PCM;
(2) ‘confirmed and active DTC’ means a DTC that is stored during the time the NCD and/or PCD system concludes that a malfunction exists;
(3) ‘NCD engine family’ means a manufacturer's grouping of engines having common methods of monitoring/diagnosing NCMs;
(4) ‘NOx Control Diagnostic system (NCD)’ means a system on-board the engine which has the capability of
(a) detecting a NOx Control Malfunction,
(b) identifying the likely cause of NOx control malfunctions by means of information stored in computer memory and/or communicating that information off-board;
(5) ‘NOx Control Malfunction (NCM)’ means an attempt to tamper with the NOx control system of an engine or a malfunction affecting that system that might be due to tampering, that is considered by this Regulation as requiring the activation of a warning or an inducement system once detected;
(6) ‘Particulate Control Diagnostic system (PCD)’ means a system on-board the engine which has a capability of:
(a) detecting a Particulate Control Malfunction,
(b) identifying the likely cause of particulate control malfunctions by means of information stored in computer memory and/or communicating that information off-board;
(7) ‘Particulate Control Malfunction (PCM)’ means an attempt to tamper with the particulate after-treatment system of an engine or a malfunction affecting the particulate after-treatment system that might be due to tampering, that is considered by this Regulation as requiring the activation of a warning once detected;
(8) ‘PCD engine family’ means a manufacturer's grouping of engines having common methods of monitoring/diagnosing PCMs;
(9) ‘Scan-tool’ means an external test equipment used for off-board communication with the NCD and/or PCD system.

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Source: https://www.legislation.gov.uk/eur/2017/654/annex/IV/division/1/division/1.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-654/annex-IV/division-1/division-1.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.