Document ID: chunk:federal_register_of_legislation:F2012C00283:reg:7:p18
Version: federal_register_of_legislation:F2012C00283
Segment Type: reg
Provision Reference: reg 7 (pt 18/51)
Character Range: 554566–557648

manner to the vehicle driver.
              2.2. Alternatively, at the request of the manufacturer, malfunction of one or more components may be electronically simulated according to the requirements of paragraph 6. below.
              2.3. Manufacturers may request that monitoring take place outside the Type I Test cycle if it can be demonstrated to the authority that monitoring during conditions encountered during the Type I Test cycle would impose restrictive monitoring conditions when the vehicle is used in service.
              3. Test vehicle and fuel
              3.1. Vehicle
               The test vehicle shall meet the requirements of  paragraph 3.2. of Annex 4a.
              3.2. Fuel
               The appropriate reference fuel as described in Annex 10 for petrol and diesel fuels and in Annex 10a for LPG and NG fuels must be used 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 administrative department from the reference fuels described in Annex 10a in the case of the testing of a mono-fuelled gas vehicle and from the reference fuels described in Annex 10 and Annex 10a in the case of the testing of a bi-fuelled gas vehicle. The selected fuel type must 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 I Test as described in paragraph 3.2. of Annex 4a.
              5. Test equipment
              5.1. Chassis dynamometer
               The chassis dynamometer shall meet the requirements of  Appendix 1 of Annex 4a.
              6. OBD test procedure
              6.1. The operating cycle on the chassis dynamometer shall meet the requirements of Annex 4a.
              6.2. Vehicle preconditioning
              6.2.1. According to the engine type and after introduction of one of the failure modes given in paragraph 6.3., the vehicle shall be preconditioned by driving at least two consecutive Type I Tests (Parts One and Two). For compression-ignition engined vehicles an additional preconditioning of two Part Two cycles is permitted.
              6.2.2. At the request of the manufacturer, alternative preconditioning methods may be used.
              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 Annex 11.
              6.3.1.3. Replacement of the oxygen sensor with a deteriorated