4.DRIVER WARNING SYSTEM
4.1.The vehicle shall include a driver warning system using visual alarms that informs the driver when a low reagent level, incorrect reagent quality, too low a rate of reagent consumption, or a malfunction, has been detected that may be due to tampering and that will lead to operation of the driver inducement system if not rectified in a timely manner. The warning system shall also be active when the driver inducement system described in Section 5 has been activated.
4.2.The vehicle on-board diagnostics (OBD) display system described in Annex 9B to UN/ECE Regulation No 49 and referred to in Annex X to this Regulation, shall not be used for the purpose of providing the visual alarms described in Section 4.1. The warning shall not be the same as the warning used for the purposes of OBD (that is, the MI – malfunction indicator) or other engine maintenance. It shall not be possible to turn off the warning system or visual alarms by means of a scan-tool if the cause of the warning activation has not been rectified.
4.3.The driver warning system may display short messages, including messages indicating clearly the following:
(a)
the remaining distance or time before activation of the low-level or severe inducements;
(b)
the level of torque reduction;
(c)
the conditions under which vehicle disablement can be cleared.
The system used for displaying the messages referred to in this point may be the same as the one used for OBD or other maintenance purposes.