AUM-4002

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.