Document ID: chunk:federal_register_of_legislation:F2021C00482:body:0:p14
Version: federal_register_of_legislation:F2021C00482
Segment Type: other
Provision Reference: 
Character Range: 38807–41778

of tests that shall not exceed 6.
35.5.4.2.                    Where the secondary brake is applied by the service brake 'Control', the vehicle shall be decelerated using the 'Secondary Brake System' and deemed to satisfy the requirements of this test if all the parameters specified in clause 35.3.3 (Item 4) are met in at least one test within a number of tests that shall not exceed 6 for each single failure of a fluid system, including where appropriate:
35.5.4.2.1.              each sub-system of a 'Split Service Brake System'; and
35.5.4.2.2.              failure of energy assistance in a 'Brake Power Assist Unit'.
35.5.5.                          Lightly Laden Partial Failure Test. The requirements of this clause shall only apply to a vehicle fitted with a brake system where the secondary brake is applied by the service brake 'Control'. The vehicle shall be deemed to satisfy the requirements of this test if all the parameters specified in clause 35.3.3 (Item 5) are met on at least one deceleration mode within a number of deceleration modes which shall not exceed 6 for each single type of partial failure, including:
35.5.5.1.                    inoperative 'Antilock System'; and
35.5.5.2.                    inoperative 'Variable Proportioning Brake System'.
35.5.5.3.                    One single failure shall be induced prior to each set of deceleration modes and the vehicle shall be restored at the completion of each set.
35.5.6.                          Service Brake Laden Effectiveness Test. A series of test modes shall be completed in the sequence of clause 35.3.3 (Item 6). The vehicle shall be deemed to satisfy the requirements of a mode if all parameters for that mode are met for at least one test within a number of tests that shall not exceed 6.
35.5.7.                          Laden Secondary Brake Test. The test procedure and determination of compliance shall be as specified in clause 35.5.4, except that the vehicle shall be at 'Maximum Loaded Test Mass 35/00'.
35.5.8.                          Laden Partial Failure Test. The test procedure and determination of compliance shall be as specified in clause 35.5.5, except that the vehicle shall be at 'Maximum Loaded Test Mass 35/00'.
35.5.9.                          Service Brake Fade Test

         35.5.9.0  Service Brake Fade Testing shall be carried out in accordance with the requirements of either clauses 35.5.9.1 or clause 35.5.9.2

35.5.9.1.                    Vehicle Service Brake Fade Test
35.5.9.1.1.1.       Successive deceleration modes shall be conducted in accordance with the following:

35.5.9.1.1.2.       Tests may be conducted at initial and final speeds which differ from those specified above, provided that for each deceleration mode it can be shown that:
(V12 - V22 ) > 7,500
for vehicles in categories MB, MC, MD and NA ; and
(V12 - V22 ) > 2,700
for vehicles in categories ME, NB AND NC
where: V1 is the initial speed in km/h and V2 is the final