Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p65
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 65/150)
Character Range: 894480–897391

performance and malfunction classification shall be performed by using one of the reference fuels mentioned in Annex 5 on which the engine is designed to operate.
 The selection of this reference fuel is done by the Type Approval Authority , who shall provide sufficient time for the test laboratory to supply the selected reference fuel.
7. Test procedures
7.1. Testing process
 The demonstration by testing of the proper malfunction classification and the demonstration by testing of the proper monitoring performance of an OBD system are issues that shall be considered separately during the testing process. For example, a Class A malfunction will not require a classification test while it may be subject to an OBD performance test.
 Where appropriate, the same test may be used to demonstrate the correct classification of a malfunction, the qualification of a deteriorated component provided by the manufacturer and the correct monitoring by the OBD system.
 The engine system on which the OBD system is tested shall comply with the emission requirements of this Regulation.
7.1.1. Testing process for demonstrating the malfunction classification
 When, according to paragraph 6.2., the Type Approval Authority requests the manufacturer to justify by testing the classification of a specific malfunction, the compliance demonstration will consist of a series of emission tests.
 According to paragraph 6.2.2., when testing is required by the Type Approval Authority to justify the classification of a malfunction into Class B1 rather than in Class A, the manufacturer shall demonstrate that the emissions due to that particular malfunction are, in selected circumstances, below the OTLs:
(a) The manufacturer selects these circumstances of test in agreement with the Type Approval Authority;
(b) The manufacturer shall not be required to demonstrate that in other circumstances the emissions due to the malfunction are actually above the OTLs.
 The emission test may be repeated upon request of the manufacturer up to three times.
 If any of these tests leads to emissions below the considered OTL, then the malfunction classification into Class B1 shall be approved.
 When testing is required by the Type Approval Authority to justify the classification of a malfunction into Class B2 rather than in Class B1 or into Class C rather than in Class B2, the emission test shall not be repeated. If the emissions measured in the test are above the OTL or the emission limit, respectively, then the malfunction shall require a reclassification.
Note: According to paragraph 6.2.1., this paragraph does not apply to malfunctions classified into Class A.
7.1.2. Testing process for demonstrating the OBD performance
 When the Type Approval Authority requests to test the OBD system performance according to paragraph 6.3., the compliance demonstration shall consist of the following phases:
(a) A malfunction is