Control unit
â–¶ How to fix
Clear the fault code if an auxiliary starting device has been used and check that the fault is not generated again. Otherwise check the alternator, battery, connectors and wiring.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
The U30 supply voltage has been above 35V.
Possible cause
The auxiliary starting device has probably been used and supplied the electrical system with too high a voltage for a short period of time. Components or wiring may be defective.