Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p109
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 109/150)
Character Range: 1027310–1030280

the reagent consumption counter and dosing counter activation and deactivation criteria and mechanisms are described in Appendix 2 to this annex.
8.2.3. The reagent consumption counter and the dosing counter information shall be made available in a standardised manner according to the provisions of Appendix 5 to this annex.
8.3. Monitoring conditions
8.3.1. The maximum detection period for insufficient reagent consumption is five hours or the period equivalent to a demanded reagent consumption of at least 2 litres, whichever is longer.
              8.3.1.1. When the reagent consumption is monitored by using at least one of the following parameters:

                 (a) The level of reagent in the on-vehicle storage tank, or

                 (b) The flow of reagent or quantity of reagent injected at a position as close as technically possible to the point of injection into an exhaust after-treatment system,

The maximum detection period for insufficient reagent consumption is extended to 48 hours or to the period equivalent to a demanded reagent consumption of at least 15 litres, whichever is longer.
8.3.2. In order to monitor reagent consumption, at least one of the following parameters within the vehicle or engine shall be monitored:
(a) The level of reagent in the on-vehicle storage tank;
                  (b) The flow of reagent or quantity of reagent injected at a position as close as technically possible to the point of injection into an exhaust after-treatment system.
8.4. Activation of the driver warning system
8.4.1. The driver warning system described in paragraph 4. shall be activated if a deviation of more than fifty per cent between the average reagent consumption and the average demanded reagent consumption by the engine system over a period to be defined by the manufacturer, which shall not be longer than the maximum period defined in paragraph 8.3.1., or, when applicable, paragraph 8.3.1.1., is detected. When the warning system includes a message display system, it shall display a message indicating the reason for the warning (for example: "urea dosing malfunction", "AdBlue dosing malfunction", or "reagent dosing malfunction").
8.4.2. The driver warning system described in paragraph 4. shall be activated in the case of interruption in reagent dosing. When the warning system includes a message display system, it shall display a message indicating an appropriate warning. This activation shall not be required where the interruption is demanded by the engine ECU because the vehicle operating conditions are such that the vehicle's emission performance does not require reagent dosing.
8.5. Activation of the driver inducement system
8.5.1. The low-level inducement system described in paragraph 5.3. shall be enabled, and subsequently activated according to the requirements of that section, if an error in the reagent consumption or an interruption in reagent dosing is not rectified within 10 engine operating