Low supply voltage
â–¶ How to fix
- Check the CMS unit for a DTC indicating faulty supply voltage. - Check condition of the battery. Read the ACSX unit's signal for supply voltage and compare with the battery voltage measured using a multimeter.
What you'll see
No driver-visible symptom recorded.
System reaction
Amber ACS warning lamp
Diagnostic depth
Detection
ECU checks if supply voltage is within normal operating range. Supply voltage is below 16 V.
Possible cause
The power system in the vehicle supplies less than 16V.