Document ID: chunk:federal_register_of_legislation:F2024C00356:reg:7:p24
Version: federal_register_of_legislation:F2024C00356
Segment Type: reg
Provision Reference: reg 7 (pt 24/51)
Character Range: 601448–604466

manufacturers are tracking IUPRM in the same manner, detailed requirements are given for defining and incrementing these counters.
              7.1.4. If, according to the requirements of this annex, the vehicle is equipped with a specific monitor M, IUPRM shall be greater or equal 0.1 for all monitors M.
              7.1.5. The requirements of this paragraph are deemed to be met for a particular monitor M, if for all vehicles of a particular OBD family manufactured in a particular calendar year the following statistical conditions hold:
               (a) The average IUPRM is equal or above the minimum value applicable  to the monitor;
                (b) More than 50 per cent of all vehicles have an IUPRM equal or above  the minimum value applicable to the monitor.
              7.1.6.  The manufacturer shall demonstrate to the approval authority that these statistical conditions are satisfied for vehicles manufactured in a given calendar year for all monitors required to be reported by the OBD system according to paragraph 7.6. of this appendix not later than 18 months after the end of a calendar year. For this purpose, statistical tests shall be used which implement recognised statistical principles and confidence levels.
              7.1.7.  For demonstration purposes of this paragraph the manufacturer may group vehicles within an OBD family by any other successive and non-overlapping 12 month manufacturing periods instead of calendar years. For establishing the test sample of vehicles at least the selection criteria of Appendix 3 paragraph 2. shall be applied. For the entire test sample of vehicles the manufacturer shall report to the approval authority all of the in-use performance data to be reported by the OBD system according to paragraph 7.6. of this appendix. Upon request, the approval authority which grants the approval shall make these data and the results of the statistical evaluation available to other approval authorities.
              7.1.8. Public authorities and their delegates may pursue further tests on vehicles or collect appropriate data recorded by vehicles to verify compliance with the requirements of this annex.
              7.2. NumeratorM
              7.2.1. The numerator of a specific monitor is a counter measuring the number of times a vehicle has been operated such that all monitoring conditions necessary for the specific monitor to detect a malfunction in order to warn the driver, as they have been implemented by the manufacturer, have been encountered. The numerator shall not be incremented more than once per driving cycle, unless there is reasoned technical justification.
              7.3. DenominatorM
              7.3.1. The purpose of the denominator is to provide a counter indicating the number of vehicle driving events, taking into account special conditions for a specific monitor. The denominator shall be incremented at least once per driving cycle, if during this driving cycle such conditions are met and the general