Document ID: chunk:federal_register_of_legislation:F2012C00283:reg:7:p9
Version: federal_register_of_legislation:F2012C00283
Segment Type: reg
Provision Reference: reg 7 (pt 9/51)
Character Range: 528118–531186

to enable it to identify types of deterioration or malfunction over the entire life of the vehicle. In achieving this objective the approval authority shall accept that vehicles which have travelled distances in excess of the Type V durability distance (according to Annex 9 of this Regulation) referred to in paragraph 3.3.1., may show some deterioration in OBD system performance such that the emission limits given in paragraph 3.3.2. may be exceeded before the OBD system signals a failure to the driver of the vehicle.
              3.1.1. Access to the OBD system required for the inspection, diagnosis, servicing or repair of the vehicle shall be unrestricted and standardised. All emission-related fault codes shall be consistent with paragraph 6.5.3.4. of Appendix 1 to this annex.
              3.1.2. No later than three months after the manufacturer has provided any authorised dealer or repair shop with repair information, the manufacturer shall make that information (including all subsequent amendments and supplements) available upon reasonable and non-discriminatory payment and shall notify the approval authority accordingly.
               In the event of failure to comply with these provisions the approval authority shall act to ensure that repair information is available, in accordance with the procedures laid down for type approval and in-service surveys.
              3.2. The OBD system shall be so designed, constructed and installed in a vehicle as to enable it to comply with the requirements of this annex during conditions of normal use.
              3.2.1. Temporary disablement of the OBD system
              3.2.1.1. A manufacturer may disable the OBD system if its ability to monitor is affected by low fuel levels. Disablement shall not occur when the fuel tank level is above 20 per cent of the nominal capacity of the fuel tank.
              3.2.1.2. A manufacturer may disable the OBD system at ambient engine starting temperatures below 266 K (-7 °C) or at elevations over 2,500 metres above sea level provided the manufacturer submits data and/or an engineering evaluation which adequately demonstrate that monitoring would be unreliable when such conditions exist. A manufacturer may also request disablement of the OBD system at other ambient engine starting temperatures if he demonstrates to the authority with data and/or an engineering evaluation that misdiagnosis would occur under such conditions. Misdiagnosis would occur under such conditions. It is not necessary to illuminate the malfunction indicator (MI) if the OBD thresholds are exceeded during a regeneration provided no defect is present.
              3.2.1.3. For vehicles designed to accommodate the installation of power take-off units, disablement of affected monitoring systems is permitted provided disablement occurs only when the power take-off unit is active.
               In addition to the provisions of this section the manufacturer may temporarily disable the OBD system in the following conditions:
               (a) For flex fuel or