Document ID: chunk:federal_register_of_legislation:F2025C00107:reg:4:p17
Version: federal_register_of_legislation:F2025C00107
Segment Type: reg
Provision Reference: reg 4 (pt 17/26)
Character Range: 132888–136074

series shall consist of up to four consecutive tests performed using anti-clockwise steering.  The other series shall consist of up to four consecutive tests performed using clockwise steering.
     2.                 During each test, the driver attempts to maintain a speed equal to the Preliminary Reference Speed throughout the 'J-Turn Test Course'.  The Reference Speed is the minimum 'Entrance Speed' at which 'Vehicle Stability Function Service Brake Application' occurs for at least two of not more than four consecutive tests within each series conducted at the same 'Entrance Speed' (within ±2 km/h).
     3.                 The Reference Speed must be determined for each direction: clockwise steering and anti-clockwise steering.  If 'Vehicle Stability Function Service Brake Application' does not occur during at least two tests within either series, the Preliminary Reference Speed shall be increased by up to 2 km/h, and the procedure in this section repeated.
 1.                            Engine torque reduction tests
     1.                     Two series of tests must be performed using the 'J-Turn Test Course', at the Reference Speed (±2 km/h) determined in clause 6.1.2 above.  One series shall consist of up to four consecutive tests performed using anti‑clockwise steering.  The other series shall consist of up to four consecutive tests performed using clockwise steering.
     2.                     During each test, the driver must fully depress the accelerator pedal from the time when the vehicle crosses the start gate until the vehicle reaches the end gate.
 2.                            Directional Control and Roll-over Control tests[11]
     1.                     Two series of tests must be performed as follows using the 'J-Turn Test Course'.  One series shall consist of up to eight consecutive tests performed using anti‑clockwise steering.  The other series shall consist of up to eight consecutive tests performed using clockwise steering.  The 'Entrance Speed' for each test in each of these test series (clockwise steering and anticlockwise steering) must be at least, the greater of:
            1.       1.25 × the Reference Speed (see clause 6.1.2 above); and
            2.       VRmax.
where:

       R = the fixed radius (in metres) of the 'J-Turn Test Course' (measured from the centre of the lane) selected by the 'Manufacturer'.
 1.                     The brake temperatures shall be monitored and the 'Initial Brake Temperature' confirmed to be between 66 °C and 204 °C.  If the 'Initial Brake Temperature' is not between 66 °C and 204 °C, the brake temperatures shall be adjusted in accordance with clause 5 of this annex.
 2.                     During each test, the driver must not release the accelerator pedal until after the 'Vehicle Stability Function Service Brake Application' has slowed the vehicle by more than 4.8 km/h below the 'Entrance Speed'.

 1.                                  'Vehicle Stability Function' failure/defect test procedures
     1.                            Simulate one or more 'Vehicle Stability Function' failure(s) or defect(s) by disconnecting the power source to any 'Vehicle Stability