Document ID: chunk:federal_register_of_legislation:F2010C00150:front:0:p16
Version: federal_register_of_legislation:F2010C00150
Segment Type: other
Provision Reference: 
Character Range: 42466–45502

to release the parking braking. system, if necessary by the use of an auxiliary release device carried/fitted on the vehicle. The engine/manual transmission or the automatic transmission (park position) may be used to achieve the above performance;

         5.2.19.2.1. A break in the supply of electricity and/or in the wiring within the electric transmission of the parking braking system shall be signalled to the driver by the yellow warning signal specified in paragraph 5.2.21.1.2. below.

         5.2.19.3. Auxiliary equipment may draw its energy from the energy reserve of the electric transmission of the parking braking system, provided that the actuation of the parking braking system will not be affected. In addition, where the energy reserve is also used by the service braking system, the requirements of paragraph 5.2.20.6. below shall apply;

         5.2.19.4. After the ignition/start switch which controls the electrical energy for the braking equipment has been switched off and/or the key removed, it shall remain possible to apply the parking braking system, whereas releasing shall be prevented.

         5.2.20. Special additional requirements for service braking systems with electric control transmission:

         5.2.20.1. With the parking brake released, the service braking system shall be able to generate a static total braking force at least equivalent to that produced during the Type-0 test, even when the ignition/start switch has been switched off and/or the key has been removed. It should be understood that sufficient energy is available in the energy transmission of the service braking system;

         5.2.20.2. In the case of a single temporary failure (< 40ms) within the electric control transmission (e.g. non-transmitted signal or data error) there shall be no distinguishable effect on the service braking performance;

         5.2.20.3. A continuous failure (> 40 ms) within the electric control transmission[4/], excluding its energy reserve shall be indicated to the driver by the red or yellow warning signal specified in paragraphs 5.2.21.1.1. and 5.2.21.1.2., respectively, as appropriate. When the prescribed service braking performance can no longer be achieved (red warning signal), failures resulting from a loss of electrical continuity (e.g. breakage, disconnection) shall be signalled to the driver as soon as they occur, and the prescribed secondary braking performance shall be fulfilled by operating the service braking control in accordance with paragraph 2.2. of annex 3 to this Regulation.

         5.2.20.4. In the event of a failure of the energy source of the electric control transmission, starting from the nominal value of the energy level, the full control range of the service braking system shall be guaranteed after twenty consecutive full stroke actuations of the service braking control. During the test, the braking control shall be fully applied for 20 seconds and released for 5 seconds on each actuation. It should be understood that during the