Diagnostic trouble code (DTC) information

Condition 

Diagnostic trouble code (DTC) AUM-4002 is stored if the ignition is off, main antenna supplied with power and the head unit/audio module detects high voltage on the main antenna output voltage.

Possible Source 

• The power supply from the head unit/audio module to the main antenna is short circuited to +12 V.
• Defective antenna amplifier.

Fault symptom[s] 

• None.