Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p87
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 87/150)
Character Range: 969758–972651

denominator is not disabled according to paragraph 5.6.; and
(c) When applicable, the specific additional incrementing rules specified in paragraph 5.3.2. are met.
5.3.2. Additional monitor specific incrementing rules
5.3.2.1. Specific denominator for evaporative system (reserved)
5.3.2.2. Specific denominator for secondary air systems (reserved)
5.3.2.3. Specific denominator for components / systems that operate at engine start-up only
 In addition to the requirements of paragraph 5.3.1. (a) and (b), the denominator(s) for monitors of components or systems that operate only at engine start-up shall be incremented if the component or strategy is commanded "on" for a time greater than or equal to 10 seconds.
 For purposes of determining this commanded "on" time, the OBD system may not include time during intrusive operation of any of the components or strategies later in the same driving cycle solely for the purposes of monitoring.
5.3.2.4. Specific denominator for components or systems that are not continuously commanded to function
 In addition to the requirements of paragraph 5.3.1. (a) and (b), the denominator(s) for monitors of components or systems that are not continuously commanded to function (e.g. Variable Valve Timing systems - VVT- or EGR valves), shall be incremented if that component or system is commanded to function (e.g., commanded "on", "open", "closed", "locked") on two or more occasions during the driving cycle, or for a cumulative time greater than or equal to 10 seconds, whichever occurs first.
5.3.2.5. Specific denominator for DPF
 In addition to the requirements of paragraph 5.3.1. (a) and (b), in at least one driving cycle the denominator(s) for DPF shall be incremented if at least 800 cumulative kilometres of vehicle operation or alternatively at least 750 minutes of engine run time have been experienced since the last time the denominator was incremented.
5.3.2.6. Specific denominator for oxidation catalysts
 In addition to the requirements of paragraph 5.3.1. (a) and (b), in at least one driving cycle the denominator(s) for monitors of oxidation catalyst used for the purpose of DPF active regeneration shall be incremented if a regeneration event is commanded for a time greater than or equal to 10 seconds.
       5.3.2.7. Specific denominator for hybrids (reserved)
5.4. Requirements for incrementing the general denominator
 The general denominator shall be incremented within 10 seconds, if and only if, all the following criteria are satisfied on a single driving cycle:
(a) Cumulative time since start of driving cycle is greater than or equal to 600 seconds while remaining:
(i) At an elevation of less than 2,500 meters above sea level; and
(ii) At an ambient temperature of greater than or equal to 266 K (‑7 degrees Celsius); and
(iii) At an ambient temperature of lower than or equal to 308 K (35 degrees Celsius).
(b)