Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p123
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 123/150)
Character Range: 1065885–1068953

on these systems if possible.

Annex 11 ‑ Appendix 5 Access to "NOx control information"
A.5.1. This appendix describes the specifications permitting access to information required in order to check the status of the vehicle with regard to the correct operation of the NOx control system ("NOx control information").

A.5.2.  Access methods

A.5.2.1. The "NOx control information" shall be provided only in accordance with the standard or standards used in association with the retrieval of engine system information from the OBD system.

A.5.2.2. Access to the "NOx control information" shall not be dependent on any access code or other device or method obtainable only from the manufacturer or the manufacturer's suppliers. Interpretation of that information shall not require any specialised or unique decoding information, unless that information is publicly available.

A.5.2.3. It shall be possible to retrieve all "NOx control information" from the system using the access method that is used to retrieve OBD information in accordance with Annex 9A.

A.5.2.4. It shall be possible to retrieve all "NOx control information" from the system using the test equipment that is used to retrieve OBD information in accordance with Annex 9A.

A.5.2.5. The "NOx control information" shall be available through "read-only" access (that is, it shall not be possible to clear, reset, erase, or modify any of the data).

A.5.3.  Information content

A.5.3.1. The "NOx control information" shall contain at least the following information:

(a) The VIN (vehicle identification number);

                  (b) The status of the warning system (active; non-active);

                  (c) The status of the low-level inducement system (active; enabled; non-active);

                  (d) The status of the severe inducement system (active; enabled; non-active);

                  (e) Number of warm-up cycles and number of engine operating hours since recorded "NOx control information" was cleared due to service or repair;

                  (f) The types of the counters relevant to this annex (reagent quality, reagent consumption, dosing system, EGR valve, monitoring system) and the number of engine operating hours indicated by each of the these counters; in the case of multiple counters being used, the value to be considered for the purposes of the "NOx control information" is the value of each of the counters relative to the failure under consideration having the highest value;

                  (g) The DTCs associated with the malfunctions relevant to this annex and when their status is 'potential' or 'confirmed and active'.

                   Annex 11 ‑ Appendix 6 Demonstration of the minimum acceptable reagent concentration CDmin
A.6.1. The manufacturer shall demonstrate the correct value of the minimum acceptable reagent quality CDmin during type approval by performing the hot part of the WHTC cycle, in accordance with the provisions of Annex 4 to this Regulation, using a reagent with the concentration CDmin.
A.6.2. The test shall follow