Council Regulation (EEC) No 3821/85Show full title

Council Regulation (EEC) No 3821/85 of 20 December 1985 on recording equipment in road transport

[F1 [F25.2. Treatment of secure messaging errors U.K.

[CSM_026] When the tachograph card recognises an SM error while interpreting a command, then the status bytes must be returned without SM. In accordance with ISO/IEC 7816-4, the following status bytes are defined to indicate SM errors:

′66 88′

:

verification of cryptographic checksum failed,

′69 87′

:

expected SM data objects missing,

′69 88′

:

SM data objects incorrect.

[CSM_027] When the tachograph card returns status bytes without SM DOs or with an erroneous SM DO, the session must be aborted by the VU.] ]