Possible Sources

DTC Description Fault Trigger Conditions DTC Type B13F9:13 Audio Input 3: Set by the audio DSP module when an open is detected on the Continuous Circuit Open LH audio signal circuits from the ACM to the audio DSP module. B1A02:01 Speaker #2: Set by the audio DSP module when a failure is detected on the On-demand General Electrical LHR quarter panel (convertible) or left parcel shelf (coupe) Failure speaker circuits. B1A02:11 Speaker #2: Set by the audio DSP module when a short to ground is Continuous and Circuit Short To detected on the LHR quarter panel (convertible) or left parcel on-demand Ground shelf (coupe) speaker circuits. When DTC B1A02:11 is set, the speaker output is disabled. B1A02:12 Speaker #2: Set by the audio DSP module when a short to voltage is Continuous and Circuit Short To detected on the LHR quarter panel (convertible) or left parcel on-demand Battery shelf (coupe) speaker circuits. When DTC B1A02:12 is set, the speaker output is disabled. B1A02:13 Speaker #2: Set by the audio DSP module when an open is detected on the On-demand Circuit Open LHR quarter panel (convertible) or left parcel shelf (coupe) speaker circuits.

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Speaker Wiring, terminals, or connectors ACM Audio DSP module

PINPOINT TEST T : THE LEFT PARCEL SHELF SPEAKER IS INOPERATIVE (COUPE)

T1 CHECK THE AUDIO SIGNAL TO THE LEFT PARCEL SHELF SPEAKER

Ignition OFF. Disconnect: Left Parcel Shelf Speaker C484. Operate the audio system in AM/ FM mode. Measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C484-1		C484-4

Possible Sources — original illustration 1, reference 4440Original colors & callouts · Select to enlarge

Is a fluctuating AC voltage present?

Yes	INSTALL a new left parcel shelf speaker. REFER to: Parcel Shelf Speaker (415-00B Information and Entertainment System - General Information - Vehicles With: Touchscreen Display, Removal and Installation).
No	GO to T2

T2 CHECK THE AUDIO CIRCUITS TO THE LEFT PARCEL SHELF SPEAKER FOR A SHORT TO VOLTAGE

Ignition OFF. Disconnect: Audio DSP Module C2385B. Ignition ON. Measure:

Source reference 4440

2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.