Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p71
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 71/150)
Character Range: 910575–913531

identification of "key" operating sequences during which some events occurs, and the counting of the subsequent operating sequences. For the purpose of illustrating this requirement, the "key" operating sequences have been given the values N and M for the first occurrence of a malfunction, respectively N' and M' for the second one.
       E.g. M means the first operating sequence following the detection of a potential malfunction, and N means the operating sequence during which the MI is switched OFF.
Figure 4A
Class A malfunction - activation of the MI and MI counters
Note: Details related to the deactivation of the continuous MI are illustrated in Figure 4B below in the specific case where a potential state is present.
Figure 4B
Illustration of the continuous MI deactivation principle
Notes:
             Means the point where monitoring of the concerned malfunction occurs.
            M Means the operating sequence when the monitor concludes for the first time that a confirmed and active failure is no longer present.
            Case 1 Means the case where the monitor does not conclude the presence of failure during the operating sequence M.
            Case 2 Means the case where the monitor has previously concluded, during the operating sequence M, the presence of the malfunction.
            Case 3 Means the case where the monitor concludes during the operating sequence M the presence of the malfunction after having first concluded to its absence.
Figure 5
Class B1 malfunction - activation of the B1 counter in 5 use Cases
Note: In this example, it is assumed that there is a single B1 counter.

Annex 9B ‑ Appendix 3 Monitoring requirements
       The items of this appendix list the systems or components required to be monitored by the OBD system, according to paragraph 4.2. of this annex. Unless specified otherwise, the requirements apply to all engine types.
       Appendix 3 - Item 1
       Electric / electronic components monitoring
       Electric/electronic components used to control or monitor the emission control systems described in this appendix shall be subject to Component Monitoring according to the provisions of paragraph 4.2. of this annex. This includes, but is not limited to, pressure sensors, temperature sensors, exhaust gas sensors and oxygen sensors when present, knock sensors, in-exhaust fuel or reagent injector(s), in-exhaust burners or heating elements, glow plugs, intake air heaters.
       Wherever a feedback control loop exists, the OBD system shall monitor the system's ability to maintain feedback control as designed (possible errors are for example: not entering feedback control within a manufacturer specified time interval, or: when feedback control has used up all the adjustment capability allowed by the manufacturer and the system cannot achieve the target) - component monitoring.

       In particular, in the case where the control of reagent injection is performed