Document ID: chunk:federal_register_of_legislation:F2025C00108:reg:4:p11
Version: federal_register_of_legislation:F2025C00108
Segment Type: reg
Provision Reference: reg 4 (pt 11/25)
Character Range: 115993–119267

the 'Manufacturer'.

APPENDIX 3 – Annex 1

    'Vehicle Stability Function' test procedures for category ME vehicles with a 'GVM' exceeding 12 tonnes and category NC 'Prime Movers'

 1.                                  General test conditions
     1.                            Ambient conditions
         1.                     The ambient temperature at the test site for all J-Turn tests prescribed in this annex must be between 0 °C and 40 °C.
         2.                     The maximum wind speed at the test site for all J-Turn tests prescribed in this annex must be no greater than 5 m/s.
     2.                            Road test surface
         1.                     All J-Turn tests prescribed in this annex must be conducted on a dry, uniform, solid-paved surface. Surfaces with irregularities and undulations, such as dips and large cracks, are unsuitable.
         2.                     The nominal[9] peak friction coefficient (PFC) of the curved lane section of the 'J-Turn Test Course' must not exceed 0.9, when measured using either:
                1.       The American Society for Testing and Materials (ASTM) E1136–93 (Reapproved 2003) standard reference test tyre, in accordance with ASTM Method E 1337–90 (Reapproved 2008), at a speed of 64.4 km/h, without water delivery; or
                2.       The k-test method specified in paragraph 1.1 of Appendix 2 to Annex 13 of Revision 8 of the United Nations Regulation No. 13 (E/ECE/324/Rev.1/Add.12/Rev.8).
         3.                     Unless otherwise 'Approved', the curved lane section of the 'J-Turn Test Course' must have a consistent gradient between level and 1 per cent.
     3.                            Vehicle conditions
         1.                     The 'Vehicle Stability Function' must be enabled for all tests, except the 'Vehicle Stability Function' failure/defect tests (see clause 7 of this annex).
         2.                     All vehicle openings (doors, windows, bonnet, boot, cargo doors, etc.) shall be in a closed position except as required for instrumentation purposes.
         3.                     The tyres fitted to the vehicle must be of the size and type specified by the vehicle 'Manufacturer' as original equipment for the vehicle, and must be inflated to the vehicle 'Manufacturer's' recommended pressure for the 'GVM' of the vehicle.
         4.                     The 'Friction Elements' of the vehicle brakes must be of the make and grade specified by the vehicle 'Manufacturer' as original equipment for the vehicle and must not be replaced during the sequence of J-Turn tests prescribed in this annex.
         5.                     In the case of a category NC 'Prime Mover', each J-Turn test prescribed in this annex must be conducted while towing a 'Control Trailer' loaded such that the required mass and mass distribution of the 'Prime Mover' is achieved.
         6.                     In the case of a category NC 'Prime Mover', an anti-jackknife system that allows a minimum articulation angle of 30 degrees between the 'Prime Mover' and a 'Semi-trailer', should (at the option of the 'Manufacturer') be fitted for each test.
         7.                     Outriggers with a maximum mass not exceeding 1,134 kg (excluding mounting