Division 2.4

When a tractor is equipped with an electric control line and electrically connected to a towed vehicle equipped with an electric control line, a continuous failure (> 40 ms) within the electric control line shall be detected in the tractor and shall be signalled to the driver by the yellow warning signal specified in point 2.2.1.29.1.2 of Annex I, when such vehicles are connected via the electric control line.