Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:110:p55
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 110 (pt 55/59)
Character Range: 759335–762412

of NOx control measures shall be detected within four OBD test cycles as referred to in the definition given in section 6.1 of Appendix 1 of Annex IV to Directive 2005/78/EC.

              6.5.6.5.        Algorithms used by the ECU for relating the actual NOx concentration to the specific NOx emission (in g/kWh) on the ETC shall not be considered to be a defeat strategy.

              6.5.6.6.        If an AECS that has been approved by the type-approval authority in accordance with section 6.1.5. becomes operational, any increase in NOx due to the operation of the AECS may be applied to the appropriate NOx level referred to in section 6.5.3.2. In all such cases, the influence of the AECS on the NOx threshold shall be described in accordance with section 6.5.5.5.

              6.5.7.            Failure of the emission control monitoring system

              6.5.7.1.        The emission control monitoring system shall be monitored for electrical failures and for removal or deactivation of any sensor that prevents it from diagnosing an emission increase as required by sections 6.5.3.2 and 6.5.3.4.

              Examples of sensors that affect the diagnostic capability are those directly measuring NOx concentration, urea quality sensors, and sensors used for monitoring reagent dosing activity, reagent level, reagent consumption or EGR rate.

              6.5.7.2.        If a failure of the emission control monitoring system is confirmed, the driver shall be immediately alerted by the activation of the warning signal according to section 3.6.5 of Annex IV to Directive 2005/78/EC.

              6.5.7.3.        The torque limiter shall be activated in accordance with section 6.5.5 if the failure is not remedied within 50 hours of engine operation.

              The period laid down in the first subparagraph shall be reduced to 36 hours from the dates specified in Article 2(7) and 2(8).

              6.5.7.4.        When the emission control monitoring system has determined the failure has ceased to exist, the fault code(s) associated with that failure may be cleared from the system memory, except in the cases referred to in section 6.5.7.5, and the torque limiter, if applicable, shall be deactivated according to section 6.5.5.6.

              Fault code(s) associated with a failure of the emission control monitoring system shall not be capable of     being cleared from the system memory by any scan tool.

              6.5.7.5.        In the case of the removal or deactivation of elements of the emission control monitoring system, in accordance with section 6.5.7.1, a non-erasable fault code shall be stored in accordance with section 3.9.2 of Annex IV to Directive 2005/78/EC for a minimum of 400 days or 9 600 hours of engine operation.

              6.5.8.            Demonstration of the emission control monitoring system

              6.5.8.1.        As part of the application for type-approval provided for in section 3, the manufacturer shall demonstrate the conformity of the provisions of this section by tests on