Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p50
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 50/150)
Character Range: 853283–856317

Class B1 malfunction is present within 3 operating sequences.
 The B1 counter shall be reset to zero when three consecutive operating sequences have occurred during which no Class B1 malfunctions have been detected.
Note: The B1 counter does not indicate the number of engine running hours with a single Class B1 malfunction present.
 The B1 counter may accumulate the number of hours of 2 or more different Class B1 malfunctions, none of them having reached the time the counter indicates.
 The B1 counter is only intended to determine when the continuous-MI shall be activated.
 Figure C2 illustrates the principle of the B1 counter and Appendix 2 to this annex contains examples that illustrate the logic.
4.6.5.2.2. Multiple B1-counters
 A manufacturer may use multiple B1 counters. In that case the system shall be capable of assigning a specific B1 counter to each Class B1 malfunction.
 The control of the specific B1 counter shall follow the same rules as the single B1 counter, where each specific B1 counter shall begin counting when the assigned Class B1 malfunction is detected.
4.7. OBD information
4.7.1. Recorded information
 The information recorded by the OBD system shall be available upon off-board request in the following packages manner:
(a) Information about the engine state;
(b) Information about active emission-related malfunctions;
(c) Information for repair.
4.7.1.1. Information about the engine state
 This information will provide an enforcement agency[35] with the malfunction indicator status and associated data (e.g. continuous-MI counter, readiness).
 The OBD system shall provide all information (according to the applicable standard set in Appendix 6 to this annex) for the external roadside check test equipment to assimilate the data and provide an enforcement agent with the following information:
(a) Discriminatory/non-discriminatory display strategy;
(b) The VIN (vehicle identification number);
(c) Presence of a continuous-MI;
(d) The readiness of the OBD system;
(e) The number of engine operating hours during which a continuous-MI was last activated (continuous-MI counter).
 This information shall be read only access (i.e. no clearing).
4.7.1.2. Information about active emission-related malfunctions
 This information will provide any inspection station[36] with a subset of engine related OBD data including the malfunction indicator status and associated data (MI counters), a list of active/confirmed malfunctions of classes A and B and associated data (e.g. B1-counter).
 The OBD system shall provide all information (according to the applicable standard set in Appendix 6 to this annex) for the external inspection test equipment to assimilate the data and provide an inspector with the following information:
(a) The gtr (and revision) number, to be integrated into Regulation No. 49 type approval marking;
(b) Discriminatory/ non-discriminatory display strategy;
(c) The VIN (vehicle identification number);
(d) The Malfunction Indicator status;
(e) The Readiness of the OBD