25/11/2025
Vehicle: 2020 Land Rover Discovery 5
Customer Complaint: Complete loss of audio output from the infotainment system.
Assessment & Diagnosis:
The vehicle was presented after the customer had sought repairs for this issue at several other facilities without resolution.We commenced a comprehensive diagnostic procedure.
An initial electronic fault code scan was performed. The scan revealed a "Lost Communication with AAM (Amplifier Audio Module)" code, with no other relevant faults present. Cross-referencing this finding with official wiring diagrams and module location guides, we isolated the fault to the AAM itself.
A physical inspection of the AAM was then conducted. Upon removal, the module exhibited clear signs of liquid intrusion and subsequent internal damage, resulting in a complete module failure. This condition was the confirmed root cause of the audio system's failure.
Conclusion:
The no-audio condition was definitively traced to a catastrophic failure of the Amplifier Audio Module due to liquid damage.The customer was advised of the findings and expressed satisfaction that the root cause had been accurately identified after previous unsuccessful repair attempts.
