System voltage is below 16 V
â–¶ How to fix
Check the signal for supply voltage and compare with the battery voltage measured using a multimeter. Also check the alternator function.
What you'll see
No driver-visible symptom recorded.
System reaction
Digital low input signals are considered as "Not available".
Diagnostic depth
Detection
Faulty supply voltage. The control unit has detected the battery voltage to be abnormally low.
Possible cause
Battery capacity is too low. Malfunctioning alternator.