Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p56
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 56/150)
Character Range: 868946–872446

an alternative location provided the installation position shall be easily accessible and protected from accidental damage during normal conditions of use, e.g. the location as described in ISO 15031 series of standards.
 If the connector is covered or located in a specific equipment box, the cover or the compartment door must be removable by hand without the use of any tools and be clearly labelled "OBD" to identify the location of the connector.
 The manufacturer may equip vehicles with additional diagnostic connectors and data-links for manufacturer-specific purposes other than the required OBD functions. If the additional connector conforms to one of the standard diagnostic connectors allowed in Appendix 6 to this annex, only the connector required by this annex shall be clearly labelled "OBD" to distinguish it from other similar connectors.
4.7.4. Erasing / resetting OBD information by a scan-tool
 On request of the scan tool, the following data shall be erased or reset to the value specified in this annex from the computer memory.
OBD information data                                                                                         Erasable  Resetable[39]
Malfunction indicator status                                                                                           X
Readiness of the OBD system                                                                                            X
Number of engine operating hours since the malfunction indicator has been activated (continuous MI counter)  X
All DTCs                                                                                                     X
The value of the B1 counter with the highest number of engine operating hours                                          X
The number of engine operating hours from the B1-counter(s)                                                            X
The freeze frame data requested by this annex                                                                X

 OBD information shall not be erased by disconnection of the vehicle's battery(s).
4.8. Electronic security
 Any vehicle with an emission control unit must include features to deter modification, except as authorized by the manufacturer. The manufacturer shall authorize modifications if these modifications are necessary for the diagnosis, servicing, inspection, retrofitting or repair of the vehicle.
 Any reprogramable computer codes or operating parameters shall be resistant to tampering and afford a level of protection at least as good as the provisions in ISO 15031‑7 (SAE J2186) or J1939-73 provided that the security exchange is conducted using the protocols and diagnostic connector as prescribed in this annex. Any removable calibration memory chips shall be potted, encased in a sealed container or protected by electronic algorithms and shall not be changeable without the use of specialised tools and procedures.
 Computer-coded engine operating parameters shall not be changeable without the use of specialised tools and procedures (e.g. soldered or potted computer components or sealed (or soldered) computer enclosures).
 Manufacturers shall take adequate steps to protect the maximum fuel delivery setting from tampering while a vehicle is in-service.
 Manufacturers may apply to the Type Approval Authority for an exemption from one of these requirements for those vehicles that are unlikely to require protection. The criteria that the Type Approval Authority will evaluate