Commission Delegated Regulation (EU) 2015/68Show full title

4. General requirements

4.1. Failures within the electric control transmission of the anti-lock braking system that affects the system with respect to the functional and performance requirements in this Annex, shall be signalled to the driver by a specific optical warning signal. The yellow warning signal specified in point 2.2.1.29.1.2 of Annex I shall be used for this purpose.

Until uniform test procedures have been agreed, the manufacturer shall provide the Technical Service with an analysis of potential failures within the control transmission and their effects. That information shall be subject to discussion and agreement between the Technical Service and the vehicle manufacturer.

4.1.1. Sensor anomalies, which cannot be detected under static conditions, shall be detected not later than when the vehicle speed exceeds 10 km/h. However, to prevent erroneous fault indication when a sensor is not generating a speed output, due to non-rotation of a wheel, verification may be delayed but detected not later than when the vehicle speed exceeds 15 km/h. The warning signal may light up again while the vehicle is stationary, provided that it is extinguished before the vehicle speed reaches 10 km/h or 15 km/h, as appropriate, when no defect is present.

4.1.2. When the anti-lock braking system is energised with the vehicle stationary, electrically controlled pneumatic modulator valve(s) shall cycle at least once.

4.2. Tractors equipped with an anti-lock braking system and authorised to tow a towed vehicle equipped with such a system shall be fitted with a separate optical warning signal for the anti-lock braking system of the towed vehicle, meeting the requirements of point 4.1. The separate warning signals specified in point 2.2.1.29.2 of Annex I shall be used for this purpose, activated via pin 5 of the electrical connector conforming to ISO 7638:2003. The ISO 7638:2003 connector may be used for 5 pin or 7 pin applications, as appropriate.

4.2.1. The warning signal shall not light up when a towed vehicle without an anti-lock braking system is coupled or when no towed vehicle is coupled. This function shall be automatic.

4.3. In the event of a failure as described in point 4.1, the following requirements shall apply:

• Tractors: The residual braking performance in the event of a failure of part of the transmission of the service braking system shall be 1,3 m/s². That requirement shall not be construed as a departure from the requirements concerning secondary braking.

• Towed vehicles: The residual braking performance shall be of at least 30 per cent of the prescribed performance for the service braking system of the relevant towed vehicle.

4.4. The operation of the system shall not be adversely affected by magnetic or electrical fields. That requirement shall be demonstrated by compliance with the technical requirements laid down on the basis of Article 17(2)(g) and (5) of Regulation (EU) No 167/2013.

4.5. A manual device shall not be provided to disconnect or change the control mode of the anti-lock braking system, except on tractors of category T or C. Where a device is fitted to tractors of category T or C, the following conditions shall be met:

4.5.1.

An optical warning signal shall inform the driver that the anti-lock braking system has been disconnected or the control mode changed; the anti-lock failure warning signal specified in point 2.2.1.29.1.2 of Annex I may be used for this purpose.

The warning signal shall be constant or flashing.

4.5.2.

The anti-lock braking system shall automatically be reconnected/returned to on-road mode when the ignition (start) device is again set to the 'on' (run) position or the vehicle speed exceeds 30 km/h.

4.5.3.

The vehicle user's handbook provided by the manufacturer should warn the driver of the consequences of manual disconnection or mode change of the anti-lock braking system.

4.5.4.

The device referred to in point 4.5 may, in conjunction with the tractor, disconnect/change the control mode of the anti-lock braking system of the towed vehicle. A separate device for the towed vehicle alone is not permitted.

4.5.5.

Devices changing the control mode of the anti-lock braking system are not subject to point 4.5 if in the changed control mode condition all requirements for the category of anti-lock braking system with which the vehicle is equipped are fulfilled. However, in such a case, points 4.5.1, 4.5.2, and 4.5.3 shall be met.

4.6. In the case of vehicles which are equipped with an anti-lock braking system and with an integrated endurance braking system, the anti-lock braking system shall act at least on the service brakes of the endurance braking system's controlled axle and on the endurance braking system itself, and shall fulfil the relevant requirements of this Annex.

4.7. In the case of towed vehicles with pneumatic braking systems, full cycling of the anti-lock braking system is only assured when the pressure available at any brake actuator of a directly controlled wheel is more than 100 kPa above the maximum cycling pressure throughout a given test. The supply pressure available may not be increased above 800 kPa.

In the case of towed vehicles with hydraulic braking systems, full cycling of the anti-lock braking system is only assured when the pressure available at any brake actuator of a directly controlled wheel is more than 1 750 kPa above the maximum cycling pressure throughout a given test. The available energy level provided to the anti-lock braking system may not be increased above 14 200 kPa.