Ignition voltage - Signal implausible
â–¶ How to fix
If the state is active continuously, check vehicle's power supply system. If the vehicle's power supply system is OK and the fault still exists, replace the ECU.
What you'll see
No driver-visible symptom recorded.
System reaction
All user functions are disabled. Yellow warning lamp.
Diagnostic depth
Detection
Fault is reported if, in case of IGNITION ON state, the difference between the UB and the UZ voltage value is greater than 3 V.
Possible cause
Damage of the vehicle's power supply system. Damage of the ECU.