No L 225/68 Official Journal of the European Communities 10. 8. 92 COUNCIL DIRECTIVE 92/55/EEC of 22 June 1992 amending Directive 77/143/EEC on the approximation of the laws of the Member States relating to roadworthiness tests for motor vehicles and their trailers (exhaust emissions) THE COUNCIL OF THE EUROPEAN COMMUNITIES, Having rega‘l'd to the Treaty establishing the European Economic Community, and in particular Article 75 thereof, Having regard to the proposal from the Commission (1), Having regard to the opinion of the European Parliament (2), Having regard to the opinion of the Economic and Social Committee (3), Whereas Directive 77/143/EEC (*) provides that all categories of vehicles listed in Annex! thereto must be subject to regular roadworthiness testing; Whereas that Directive provides for the adoption of separate directives to test the standards which the items listed in Annex II of that Directive must satisfy and for the establishment of technical committee to advise the Commission before it adopts measures to adjust roadworthiness tests to technical progress; Whereas this Directive is intended to maintain emissions at a low level throughout the useful life of a vehicle by means of regular exhaust emission tests and to ensure that vehicles which are major polluters are withdrawn from service until they are brought to a proper state of maintenance; Whereas most Member States have adopted procedures for testing heavy commerical vehicles with regard to the opacity of their exhaust fumes; Whereas several Member States have national rules for testing the gaseous emissions from lighter vehicles, particularly passenger cars; Whereas assessment- of the type-approval procedures for testing gaseous emissions and fumes emitted by all types of vehicles shows that applying those procedures in the roadworthiness test presents some difficulty; Whereas testing during the life cycle of a vehicle should be relatively simple, quick and inexpensive; (1) OJ No L 189, 20. 7. 1991, p. 20. (2) O] No C 150, 15. 6. 1992. (*) O] No C 49, 24. 2. 1992, p. 64. () OJ No L 47, 18. 2. 1977, p. 47. Last amended by Directive 91/328/EEC (O] No L. 178, 6. 7. 1991, p. 29). Whereas bad tuning and inadequate maintenance are detrimental not only to the engine but also to the environment since they cause increased pollution and fuel consumption; Whereas it is important that environment-friendly transport be developed; Whereas in the case of compression ignition (diesel engines) measurement of the opacity of the exhaust fumes is considered to be an adequate indicator of the condition of the vehicle’s state of maintenance, with regard to emission; Whereas for positive ignition petrol engines measurement of carbon monoxide emissions from the exhaust pipe when the engine is idling is considered to be an adequate indicator of the vehicle’s state of maintenance, with regard to emission; Whereas the failure rate in exhaust emission tests for vehicles which have not been regularly maintained may well be high; Whereas in the case of petrol-engined vehicles for which the type-approval standards specify that they should be equipped with advanced emission control systems such as three-way catalytic converters which are lambda-probe controlled, the regular emission test standards will be more stringent than for conventional vehicles; Whereas this Directive will be adapted from time to time to take account of developments in vehicle construction which facilitate in-service testing and in test methods which reflect more closely the actual conditions in which a vehicle is used. HAS ADOPTED THIS DIRECTIVE: Article 1 Annex II to Directive 77/143/EEC is hereby amended as follows: 1. the two columns in section 8.2 {exhaust emissions) shall be replaced by the text set out in the Annex to this Directive; 2. aftersection 8.2, the following headings shall be inserted above the 2 columns: VEHICLES IN CATEGORIES 1,2,3and 4 VEHICLES IN CATEGORIES 5and 6