Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:110:p41
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 110 (pt 41/59)
Character Range: 719087–722033

this Directive.

              As an alternative, the manufacturer may identify the fault using the most appropriate fault code consistent with those given in SAE J2012 or in SAE J1939-73.

              (1) The use of the future ISO single protocol standard developed in the framework of the UN/ECE for a world-wide global technical regulation on heavy-duty OBD will be con- sidered by the Commission in a proposal to replace the use of the SAE J1939 and ISO 15765 series of standards to satisfy the appropriate requirements of section 6 as soon as the ISO single protocol standard has reached the DIS stage.
             6.8.6. The connection interface between the vehicle and the diagnostic tester must be standardised and must meet all the requirements of ISO 15031-3 or SAE J1939-13.

              In the case of category N2, N3, M2, and M3 vehicles, as an alternative to the connector location described in the above standards and provided all other requirements of ISO 15031-3 are met, the connector may be located in a suitable position by the side of the driver's seat, including on the floor of the cabin. In this case the connector should be accessible by a person standing outside the vehicle and not restrict access to the driver's seat.

              The installation position must be subject to agreement of the approval authority such that it is readily accessible by service personnel but pro- tected from accidental damage during normal conditions of use.

Appendix 1

ON-BOARD DIAGNOSTIC (OBD) SYSTEM APPROVAL TESTS

             1. INTRODUCTION

              This Appendix describes the procedure for checking the function of the on board diagnostic (OBD) system installed on the engine by failure simulation of relevant emission-related systems in the engine management or emission control system. It also sets procedures for determining the durability of OBD systems.

             1.1. Deteriorated components/systems

              In order to demonstrate the efficient monitoring of an emission control system or component, the failure of which may result in tailpipe emissions exceeding the appropriate OBD threshold limits, the manufacturer must make available the deteriorated components and/or electrical devices which would be used to simulate failures.

              Such deteriorated components or devices must not cause emissions to exceed the OBD threshold limits referred to in the table in Article 4(3) of this Directive by more than 20 %.

              In the case of type-approval of an OBD system according to Article 4(1) of this Directive, the emissions shall be measured over the ESC test cycle (see Appendix 1 to Annex III to Directive 2005/55/EC). In the case of type- approval of an OBD system according to Article 4(2) of this Directive, the emissions shall be measured over the ETC test cycle (see Appendix 2 to Annex III to Directive 2005/55/EC).

             1.1.1. If it is determined that