Loss of ground
â–¶ How to fix
Check the ground connections to ACS.
What you'll see
ACS will probably remain fully operational as long as one of the two ground pins are still grounded.
System reaction
Amber ACS warning lamp
Diagnostic depth
Detection
ACS has detected a voltage difference between the ground pins A3 and A1.
Possible cause
• Defect wiring (pin A3 or A1) • Defect connector A