Tachograph power supply - no signal
â–¶ How to fix
Check connectors and cable wiring (faulty contact). Check power supply values cl.15 and cl.30. Check this values at engine start. Check tachograph itself.
What you'll see
Display "Power supply interruption"
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
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Possible cause
In most of the cases this DTC is due to a manual disconnection of the vehicle battery or of the tachograph (no fault). For the remaining cases, see possible repair actions.