IEEE 1616a-2010 PDF
Motor Vehicle Event Data Recorders (MVEDRs) collect, record, store and export data related to pre-defined events in usage history. This amendment defines a lockout protocol for MVEDR output data accessibility by securing the vehicle output diagnostic link connector (DLC). This standard does not prescribe data security within the vehicle electronic control units (ECUs) or within the intra-vehicle communication and/or diagnostic networks but instead defines ways and means to permit uniform, but controlled access of electronic scan tools to the DLC for legitimate vehicle emissions status, maintenance and/or repair. This standard also defines a means of maintaining data security on the vehicle via a motor vehicle DLC connector lockout apparatus (MVEDRCLA). The MVEDRCLA is applicable to vehicles and their respective event data recorders for all types of motor vehicles licensed to operate on public highways.
Change the purpose as follows: Many light-duty vehicles, and increasing numbers of heavy commercial vehicles, are equipped with some form of MVEDR. These systems, which are designed and produced by individual motor vehicle manufacturers and component suppliers, are diverse in function and proprietary in nature, however, the SAE J1962 [Bxx] (ISO 15031-3:2004 [Bxx]) vehicle DLC has a common design and pinout, and is thus universally used to access event data recorder information.2 Data access via the DLC can be accomplished by using scan tools or microcomputers and network interfaces. This same DLC and network interface is also used for re-calibrating electronic control units on a vehicle. Such ECU applications can include restraint controls, engine controls, stability controls, braking controls, etc. This standard defines a protocol to protect against misuse of electronic tools which use the DLC to erase, modify or tamper with electronic controller or odometer readings, or to improperly download data. Implementation of MVEDRCLA provides an opportunity to voluntarily achieve DLC security by standardizing a MVEDRCLA which will act to prevent vehicle tampering, which can include odometer fraud, illegal calibrations leading to emissions violations and theft of personal data. Adoption of this standard will therefore make the common MVEDR/DLC data more secure and credible while still permitting accessibility to legitimate end users. The continuing implementation of MVEDR systems provides an opportunity to voluntarily standardize data output and retrieval protocols to facilitate analysis and promote compatibility of MVEDR data. Adoption of the standard will therefore make MVEDR data more accessible and useful to end users.
Amendment Standard – Inactive-Reserved. This amendment adds information pertaining to motor vehicle event data recorder connector lockout apparatus (MVEDRCLA) by revision.
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