Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p135
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 135/150)
Character Range: 1099489–1102501

requiring regeneration are incorporated in the original exhaust after-treatment system.
If these conditions are fulfilled, the emissions durability performance of other members of the family may be determined from the emissions results (S) of that family member determined according to the requirements set out in paragraphs 4.3.2.1., 4.3.2.2. and 4.3.2.3. and using the ageing factors determined for the parent of that family.
              4.3.5. Fuels

              In the case described in paragraph 4.6.2. to this Regulation, the test procedure laid down in paragraphs 4.3.1. to 4.3.2.7. of this annex shall be conducted with the fuels declared by the manufacturer of the original engine system. However, in agreement with the Type Approval Authority, the durability procedure set out in Appendix 4 and referred to in paragraph 4.3.2.4. may be performed only with the fuel which represents the worst case in terms of ageing.

4.4. Requirements regarding exhaust back-pressure
The back pressure shall not cause the complete exhaust system to exceed the value specified according to paragraph 6.1.2. of this Regulation.
4.5. Requirements regarding OBD compatibility (applicable only to replacement pollution control devices intended to be fitted to vehicles equipped with an OBD system)
4.5.1. OBD compatibility demonstration is required only when the original pollution control device was monitored in the original configuration.
4.5.2. The compatibility of the replacement pollution control device with the OBD system shall be demonstrated by using the procedures described in Annex 9B for replacement pollution control devices intended to be fitted to engines or vehicles type-approved in accordance with this Regulation.
4.5.3. The provisions in this Regulation applicable to components other than pollution control devices shall not apply.
4.5.4. The replacement pollution control device manufacturer may use the same preconditioning and test procedure as used during the original type approval. In this case, the Type Approval Authority which granted original type approval of an engine of a vehicle shall provide, on request and on a non-discriminatory basis, appendix on test conditions to Annex 1 which contains the number and type of preconditioning cycles and the type of test cycle used by the original equipment manufacturer for OBD testing of the pollution control device.
4.5.5. In order to verify the correct installation and functioning of all other components monitored by the OBD system, the OBD system shall indicate no malfunction and have no stored fault codes prior to the installation of any of the replacement pollution control device. An evaluation of the status of the OBD system at the end of the tests described in paragraphs 4.3.2. to 4.3.2.7. may be used for this purpose.
4.5.6. The malfunction indicator shall not activate during vehicle operation required by paragraphs 4.3.2. to 4.3.2.7.
              4.6. Requirements regarding compatibility with the NOx control measures