24.2.2023
EN
Official Journal of the European Union
L 60/11
5.2.14.
Warning device
5.2.14.1.
Any vehicle fitted with a service brake actuated from an energy reservoir shall, where the prescribed secondary braking performance cannot be obtained by means of this brake without the use of the stored energy, be provided with a warning device, giving an optical or acoustic signal when the stored energy, in any part of the system, falls to a value at which without re-charging of the reservoir and irrespective of the load conditions of the vehicle, it is possible to apply the service brake control a fifth time after four full-stroke actuations and obtain the prescribed secondary braking performance (without faults in the service brake transmission device and with the brakes adjusted as closely as possible).
This warning device shall be directly and permanently connected to the circuit.
When the engine is running under normal operating conditions and there are no faults in the braking system, as is the case in type approval tests, the warning device shall give no signal except during the time required for charging the energy reservoir(s) after start-up of the engine.
The red warning signal specified in paragraph 5.2.21.1.1. below shall be used as the optical warning signal.
5.2.14.2.
However, in the case of vehicles which are only considered to comply with the requirements of paragraph 5.2.4.1. of this Regulation by virtue of meeting the requirements of paragraph 1.3. of Annex 4 to this Regulation, the warning device shall consist of an acoustic signal in addition to an optical signal.
These devices need not operate simultaneously, provided that each of them meets the above requirements and the acoustic signal is not actuated before the optical signal.
The red warning signal specified in paragraph 5.2.21.1.1. below shall be used as the optical warning signal.
5.2.14.3.
This acoustic device may be rendered inoperative while the parking brake is applied and/or, at the choice of the manufacturer, in the case of automatic transmission the selector is in the ‘Park’ position.
5.2.15.
Without prejudice to the requirements of paragraph 5.1.2.3. above, where an auxiliary source of energy is essential to the functioning of a braking system, the reserve of energy shall be such as to ensure that, if the engine stops or in the event of a failure of the means by which the energy source is driven, the braking performance remains adequate to bring the vehicle to a halt in the prescribed conditions.
In addition, if the muscular effort applied by the driver to the parking braking system is reinforced by a servo device, the actuation of parking braking shall be ensured in the event of a failure of the servo device, if necessary by using a reserve of energy independent of that normally supplying the servo device.
This reserve of energy may be that intended for the service braking system.
5.2.16.
The pneumatic/hydraulic auxiliary equipment shall be supplied with energy in such a way that during its operation the prescribed deceleration values can be reached and that even in the event of damage to the source of energy the operation of the auxiliary equipment cannot cause the reserves of energy feeding the braking systems to fall below the level indicated in paragraph 5.2.14. above.
5.2.17.
In the case of a motor vehicle equipped to tow a trailer with electric service brakes, the following requirements shall be met:
5.2.17.1.
The power supply (generator and battery) of the motor vehicle shall have a sufficient capacity to provide the current for an electric braking system.
With the engine running at the idling speed recommended by the manufacturer and all electrical devices supplied by the manufacturer as standard equipment of the vehicle switched on, the voltage in the electrical lines shall at maximum current consumption of the electrical braking system (15 A) not fall below the value of 9,6 V measured at the connection.
The electrical lines shall not be capable of short circuiting even when overloaded;
5.2.17.2.
In the event of a failure in the motor vehicle's service braking system, where that system consists of at least two independent units, the unit or units not affected by the failure shall be capable of partially or fully actuating the brakes of the trailer;
5.2.17.3.
The use of the stop-lamp switch and circuit for actuating the electrical braking system is permissible only if the actuating line is connected in parallel with the stop-lamp and the existing stop-lamp switch and circuit are capable of taking the extra load.