IEEE 1616a-2010

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.