1. L-category vehicles, with the exception of L1e, L2e and L6e vehicles, shall be equipped with an OBD system which complies with the functional requirements and test procedures laid down in the delegated acts referred to in paragraph 8 and as from the application dates set out in Annex IV.
2. From the dates set out in point 1.8.1 of Annex IV, vehicle categories and subcategories L3e, L4e, L5e-A and L7e-A shall be equipped with an OBD stage I system which monitors any electric circuit and electronics failure of the emission control system and reports those failures which result in the emission thresholds laid down in Annex VI (B1) being exceeded.
3. From the dates set out in point 1.8.2 of Annex IV, vehicle categories and subcategories L3e, L4e, L5e and L7e shall be equipped with an OBD stage I system which monitors any electric circuit and electronics failure of the emission control system and which triggers a report when the emission thresholds laid down in Annex VI (B1) are exceeded. OBD stage I systems for those vehicle categories and subcategories shall also report the triggering of any operating mode which significantly reduces engine torque.
4. From the dates set out in point 1.8.3 of Annex IV, vehicle categories L3e, L4e, L5e and L7e shall be equipped with an OBD stage I system which monitors any electric circuit and electronics failure of the emission control system and which triggers a report when the emission thresholds laid down in Annex VI (B2) are exceeded. OBD stage I systems for those vehicle categories shall also report the triggering of any operating mode which significantly reduces engine torque.
5. From the dates set out in point 1.8.4 of Annex IV, vehicle categories and subcategories L3e, L4e, L5e-A and L7e-A shall in addition be equipped with an OBD stage II system which monitors and reports emission control system failures and degradation, with the exception of catalyst monitoring, which result in the OBD emission thresholds laid down in Annex VI (B1) being exceeded.
6. From the dates set out in point 1.8.5 of Annex IV, vehicle categories and subcategories L3e, L4e, L5e-A and L7e-A shall in addition be equipped with an OBD stage II system which monitors and reports emission control system failures and degradation which result in the OBD emission thresholds laid down in Annex VI (B2) being exceeded.
7. Paragraphs 5 and 6 shall not apply to enduro motorcycles in subcategory L3e-AxE and trial motorcycles in subcategory L3e-AxT.
8. In order to harmonise the OBD system reporting of functional safety or emission control system faults and facilitate effective and efficient repair of a vehicle, the Commission is empowered to adopt delegated acts in accordance with Article 75 supplementing this Regulation by laying down the detailed technical requirements related to on-board diagnostics with respect to vehicle categories and subcategories as set out in Annex II, C1 – Vehicle construction and general type-approval requirements, the row relating to No 11, including functional OBD requirements and test procedures for the subjects listed in paragraphs 1 to 7 of this Article, and the detailed technical requirements related to test type VIII referred to in Annex V.]