Speed pulse output Recording Unit (B7)
â–¶ How to fix
Check whether the attached control device actively monitors the line and deactivate if necessary. Check output "B7" on tachograph, if necessary deactivate B7 monitoring. Check the connection cable between the tachograph and the attached control device. Replace any defective components
What you'll see
Display "internal fault"
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
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Possible cause
Fault at v-pulse output (B7). The connection cable between the tachograph and the attached control device is defective. Attached control device at output "B7" is defective. Output "B7" on tachograph is defective.