Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p53
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 53/150)
Character Range: 861273–864093

to that monitor since the last erasing by an external request or command (for example through an OBD scan-tool). Readiness shall be set to "not complete" by erasing the fault code memory (see paragraph 4.7.4.) by an external request or command (for example through an OBD scan-tool).
 Normal engine shutdown shall not cause the readiness to change.
4.7.1.5.1. The manufacturer may request, subject to approval by the Type Approval Authority, the ready status for a monitor to be set to indicate "complete" without the monitor having run and concluded the presence or the absence of the failure relevant to that monitor.
Such a request may only be approved if during a multiple number of operating sequences (minimum 9 operating sequences or 72 operation hours):
                  (a)            Monitoring is temporarily disabled according to paragraph 5.2. of this annex due to the continued presence of extreme operating conditions (e.g. cold ambient temperatures, high altitudes); or
                  (b)            The system that is monitored is not in operation and the DTC associated to that system does not have the confirmed and active or the previously active status at the time when the readiness status becomes incomplete during a repair.
Any such request must specify the conditions for monitoring system disablement and the number of operating sequences that would pass without monitor completion before ready status would be indicated as "complete".
The extreme ambient or altitude conditions considered in the manufacturer's request shall never be less severe than the conditions specified by this annex for temporary disablement of the OBD system."
4.7.1.5.2. Monitors subject to readiness
 Readiness shall be supported for each of the monitors or groups of monitors that are identified in this annex and that are required when and by referring to this annex, with the exception of items 11 and 12 of Appendix 3 to this annex.
4.7.1.5.3. Readiness for continuous monitors
 Readiness of each of the monitors or groups of monitors that are identified in items 1, 7 and 10 of Appendix 3 to this annex, required when and by referring to this annex, and that are considered by this annex as running continuously, shall always indicate "complete".
4.7.2. Data stream information
 The OBD system shall make available to a scan tool in real time the information shown in Tables 1 to 4 in Appendix 5 to this annex, upon request (actual signal values should be used in favour of surrogate values).
 For the purpose of the calculated load and torque parameters, the OBD system shall report the most accurate values that are calculated within the applicable electronic control unit (e.g. the engine control computer).
 Table 1 in Appendix 5 to this annex gives the list of mandatory OBD information relating to the