Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:13:p13
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 13 (pt 13/23)
Character Range: 1978878–1982326

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 after introduction of one of the failure modes given in paragraph 6.3. of this appendix, the vehicle shall be preconditioned by driving at least two consecutive 4-phase-WLTC tests.

               Level 1B Only

              According to the engine type and after introduction of one of the failure modes given in paragraph 6.3. of this appendix, the vehicle shall be preconditioned by driving at least two consecutive 3-phase-WLTC tests.

              6.2.3. Level 1A Only

              At the request of the manufacturer with approval by Type Approval Authority, alternative preconditioning methods may be used.

               The reason for the use of additional preconditioning cycles or alternative preconditioning methods as well as details of these cycles/methods shall be reported in the type approval documentation.

              6.3. Failure modes to be tested

              6.3.1. Positive ignition engined vehicles:

              6.3.1.1. Replacement of the catalyst with a deteriorated or defective catalyst or electronic simulation of such a failure;

              6.3.1.2. Engine misfire conditions according to the conditions for misfire monitoring given in paragraph 3.3.3.2. of this annex;

              6.3.1.3. Replacement of the oxygen sensor with a deteriorated or defective oxygen sensor or electronic simulation of such a failure;

              6.3.1.4. Electrical disconnection of any other emission-related component connected to a powertrain management computer (if active on the selected fuel type);

              6.3.1.5.  Electrical disconnection of the electronic evaporative purge control device (if equipped and if active on the selected fuel type).

              6.3.2. Compression-ignition engined vehicles:

              6.3.2.1. Where fitted, replacement of the catalyst with a deteriorated or defective catalyst or electronic simulation of such a failure.

              6.3.2.2. Where fitted, total removal of the particulate trap or, where sensors are an integral part of the trap, a defective trap assembly.

              6.3.2.3. Electrical disconnection of any fuelling system electronic fuel quantity and timing actuator.

              6.3.2.4. Electrical disconnection of any other emission-related component connected to a powertrain management computer.

              6.3.2.5. In meeting the requirements of paragraphs 6.3.2.3. and 6.3.2.4. of this appendix, and with the agreement of the Type Approval Authority, the manufacturer shall take appropriate steps to demonstrate that the OBD system will indicate a fault when disconnection occurs.

              6.3.2.6. The manufacturer shall demonstrate that malfunctions of the EGR flow and cooler are detected by the OBD system during its approval test.

              6.4. OBD system test

              6.4.1. Vehicles fitted with positive ignition engines:

              6.4.1.1. After vehicle preconditioning according to paragraph 6.2. of this appendix, the test vehicle is driven over a Type 1 test.

               The MI shall be activated at the latest before the end of this test under any of