Handling fault
MC25: * If the error message appears repetitively, replace the tachograph. MC26: * Check the sealing (housing) of the tachograph. * If the error message appears repetitively, replace the tachograph. MC29: * Remove one of the tachograph cards. MC30: * Reduce speed.
What you'll see
No driver-visible symptom recorded.
System reaction
MC25/EV400: * Warning message with error text "security breach" together with Memory Code 25 is shown in the tachograph display. * The warning message will be displayed repetitively every hour until the cause is withdrawn. * Event stored in the tachograph memory * Event stored and in the inserted tachograph card. * System event in TCO1 CAN message is set to active. * Tachograph warning (amber T) is displayed in the instrument cluster. MC26/EV401: * Warning message with error text "security breach" together with Memory Code 26 is shown in the tachograph display. * The warning message will be displayed repetitively every hour until the cause is withdrawn. * Event stored in the tachograph memory * Event stored and in the inserted tachograph card. * System event in TCO1 CAN message is set to active. * Tachograph warning (amber T) is displayed in the instrument cluster. MC27/EV402 (Release 1.2 only): * Warning message with error text "security breach" together with Memory Code 27 is shown in the tachograph display. * The warning message will be displayed repetitively every hour until the cause is withdrawn. * Event stored in the tachograph memory * Event stored and in the inserted tachograph card. * System event in TCO1 CAN message is set to active. * Tachograph warning (amber T) is displayed in the instrument cluster. MC29/EV404: * Warning message with error text: "cards conflict" together with Memory Code 29 is shown in the tachograph display. * The warning message will be displayed repetitively every hour until the cause is withdrawn. * Event stored in the tachograph memory * Event stored and in the inserted tachograph card. * System event in TCO1 CAN message is set to active. * Tachograph warning (amber T) is displayed in the instrument cluster. MC30/EV405: * Event warning message with error text: "overspeed" together with Memory Code 30 is shown in the tachograph display. * The warning message will be displayed repetitively every hour until the cause is withdrawn. * Event stored in the tachograph memory * Event stored and in the inserted tachograph card. * System event in TCO1 CAN message is set to active. * Tachograph warning (amber T) is displayed in the instrument cluster.
Diagnostic depth
MC25: * Error in data memory detected. MC26: * The tachograph housing was or is opened. MC29: * Invalid card combination in card slots 1 and 2; these two tachograph cards may not be inserted at the same time. MC30: * The programmed maximum speed was exceeded for longer than 60 seconds.
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