Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:13:p12
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 13 (pt 12/23)
Character Range: 1975966–1979208

for testing. The fuel type for each failure mode to be tested (described in paragraph 6.3. of this appendix) may be selected by the Type Approval Authority from the reference fuels described in Annex B3 to this Regulation in the case of the testing of a mono-fuelled gas vehicle or of a bi-fuelled gas vehicle. The selected fuel type shall not be changed during any of the test phases (described in paragraphs 2.1. to 2.3. of this appendix). In the case of the use of LPG or NG/biomethane as a fuel it is permissible that the engine is started on petrol and switched to LPG or NG/biomethane after a pre-determined period of time which is controlled automatically and not under the control of the driver.

              4. Test temperature and pressure

              4.1. The test temperature and pressure shall meet the requirements of the Type 1 test as described in Annex B6 to this Regulation.

              5. Test equipment

              5.1. Chassis dynamometer

               The chassis dynamometer shall meet the requirements of Annex B5 to this Regulation.

              6. OBD test procedure

              An overview of the OBD test procedure is provided in Figure C5.App1/1. This is for information purposes only.

              Figure C5.App1/1
              Overview of demonstration test

              6.1. The operating cycle on the chassis dynamometer shall be the applicable WLTC driven in the Type 1 test, as specified in Annexes Part B.

              6.1.1.  The Type 1 test need not be performed for the demonstration of electrical failures (short/open circuit). The manufacturer may demonstrate these failure modes using driving conditions in which the component is used and the monitoring conditions are encountered. These conditions shall be reported in the type approval documentation.

              6.1.2. At the beginning of each failure mode to be demonstrated, the fault code memory shall be cleared.

              6.2. Vehicle preconditioning

              6.2.1. Preconditioning for adaption

              Preconditioning for adaption consists of two parts

                  (a) Preconditioning for adaption without fault

                  (b) Preconditioning for adaption with fault

              upon the choice of the manufacturer.

               Level 1A

               The preconditioning for adaption consists of one or more consecutive WLTC 4-phase tests. At the request of the manufacturer and with the approval of the Type Approval Authority, alternative method for adaption may be used instead of 4-phase-tests.

               If the fault code is stored after preconditioning for adaption, manufacturer shall delete the fault code.

               Level 1B

               The preconditioning for adaption consists of one or more consecutive WLTC 3-phase tests. At the request of the manufacturer and with the approval of the Type Approval Authority, alternative method for adaption may be used instead of 3-phase-tests.

               If the fault code is stored after preconditioning for adaption, manufacturer shall delete the fault code.

              6.2.2. Preconditioning for Monitoring

              6.2.2.1. Level 1A Only

              According to the engine type and