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.
Il n’est pas nécessaire que ces dispositifs fonctionnent simultanément, à condition que chacun d’eux réponde aux prescriptions ci-dessus et que le signal sonore ne se déclenche pas avant le signal lumineux.