08-316-25

Flash: Amplifier (AMP) Diagnostic and System Updates **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs):**
• B143B-12 - ANC Microphone 1-Circuit Short To Battery.
• B143C-12 - ANC Microphone 2-Circuit Short To Battery.
• B143E-12 - ANC Microphone 3-Circuit Short To Battery.
• B143F-12 - ANC Microphone 4-Circuit Short To Battery. NOTE: The DTCs are wrongly set and do not affect Active Noise Cancellation (ANC) performance This bulletin involves updating the AMP with the latest available software.