Tachograph power supply low
â–¶ How to fix
1) Check vehicle power supply levels. 2) Check power supply input to tachograph. 3) Check cable harness and tachograph operation. 4) Replace defective components. 5) If no error found and error remains despite repetitive acknowledgement, replace the tachograph and pair the motions sensor with the tachograph and perform a new calibration of the tachograph system.
What you'll see
tbd
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
The power supply to the tachograph has been below 8,5V (ADR < 18V) for more than 4 seconds. Cranking voltage should not cause this event.
Possible cause
* Power interruption. * Under voltage. * Fault in cable harness.