Diagnostic trouble code (DTC) information

Condition 

Diagnostic trouble code (DTC) AUM-4BFF is stored if the control module registers that there was a fault when the software was downloaded.

Possible Source 

• Fault when downloading new software.

Fault symptom[s] 

• The rheostat does not function.
• Keypad lighting not operating.
• The carphone mute does not function.