Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:110:p19
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 110 (pt 19/59)
Character Range: 656149–659729

owner of the heavy-duty vehicle or heavy-duty engine. This maintenance schedule may be updated as necessary throughout the service accumulation schedule provided that no maintenance operation is deleted from the maintenance schedule after the operation has been performed on the test engine.

             4.1.3. Any emission-related maintenance performed on engines must be necessary to assure in-use conformity with the relevant emission standards. The manufacturer shall submit data to the type-approval authority to demonstrate that all of the emission-related scheduled maintenance is tech- nically necessary.

             4.1.4. The engine manufacturer shall specify the adjustment, cleaning and maintenance (where necessary) of the following items:

                -          Filters and coolers in the exhaust gas re-circulation system

                -          Positive crankcase ventilation valve

                -          Fuel injector tips (cleaning only)

                -          Fuel injectors

                -          Turbocharger

                -          Electronic engine control unit and its associated sensors and actuators

                -          Particulate filter system (including related components)

                -          Exhaust gas re-circulation system, including all related control valves and tubing

                -          Any exhaust aftertreatment system.

             4.1.5. For the purposes of maintenance, the following components are defined as critical emission-related items:

                -          Any exhaust aftertreatment system

                -          Electronic engine control unit and its associated sensors and actuators

                -          Exhaust gas re-circulation system including all related filters, coolers, control valves and tubing

                -          Positive crankcase ventilation valve.

             4.1.6. All critical emission-related scheduled maintenance must have a reasonable likelihood of being performed in-use. The manufacturer shall dem- onstrate to the approval authority the reasonable likelihood of such maintenance being performed in-use and such demonstration shall be made prior to the performance of the maintenance during the service accumulation schedule.

             4.1.7. Critical emission-related scheduled maintenance items that satisfy any of the conditions defined in sections 4.1.7.1 to 4.1.7.4 will be accepted as having a reasonable likelihood of the maintenance item being performed in-use.

             4.1.7.1. Data is submitted which establishes a connection between emissions and vehicle performance such that as emissions increase due to lack of main- tenance, vehicle performance will simultaneously deteriorate to a point unacceptable for typical driving.

             4.1.7.2. Survey data is submitted which demonstrates that, at an 80 % confidence level, 80 % of such engines already have this critical maintenance item performed in-use at the recommended interval(s).

             4.1.7.3. In association with the requirements of section 4.7 of Annex IV to this Directive, a clearly visible indicator shall be installed on the dashboard of the vehicle to alert the driver that maintenance is due. The indicator shall be actuated at the appropriate distance or by component failure. The indicator must remain activated while the engine is in operation and shall not be erased without the required maintenance being carried out. Re-setting of the signal shall be a required step in the maintenance schedule. The system must