Program memory, checksum error
â–¶ How to fix
* Replace the tachograph.
What you'll see
No driver-visible symptom recorded.
System reaction
MC04/EV003: * Warning message with error text: "Internal fault" together with Memory Code 04 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 * The warning message will be displayed repetitively every hour until the cause is withdrawn.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
Detection
A general serious fault has appeared in the device.
Possible cause
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