Division 2.3.1 GeneralF1

The test vehicle shall conform in all its components with the production series, or, if the vehicle is different from the production series, a full description shall be included in all relevant test reports. In selecting the test vehicle, the manufacturer and the approval authority shall agree which vehicle model is representative for the interpolation family.

For the measurement of emissions, the road load as determined with test vehicle H shall be applied. In the case of a road load matrix family, for the measurement of emissions, the road load as calculated for vehicle H_M in accordance with paragraph 5.1. of Sub-Annex 4 shall be applied.

If at the request of the manufacturer the interpolation method is used (see paragraph 3.2.3.2. of Sub-Annex 7), an additional measurement of emissions shall be performed with the road load as determined with test vehicle L. Tests on vehicles H and L should be performed with the same test vehicle and shall be tested with the shortest n/v ratio (with a tolerance of ± 1,5 per cent) within the interpolation family. In the case of a road load matrix family, an additional measurement of emissions shall be performed with the road load as calculated for vehicle L_M in accordance with paragraph 5.1. of Sub-Annex 4.

Road load coefficients and the test mass of test vehicle L and H may be taken from different road load families, as long as the difference between these road load families results from applying paragraph 6.8. of Sub-Annex 4, and the requirements in paragraph 2.3.2. of this Sub-Annex are maintained.