DTC Fault Trigger Conditions

The RHF door speaker and RHF A-pillar tweeter speaker share the same audio signal.

DTC Description Fault Trigger Conditions B1A02:01 Speaker #2: General Set by the ACM when a failure is detected on the RHF door or RHF A-pillar Electrical Failure tweeter speaker circuits. B1A02:11 Speaker #2: Circuit Set by the ACM when a short to ground is detected on the RHF door or RHF Short To Ground A-pillar tweeter speaker circuits. When DTC B1A02:11 is set, the speaker output is disabled. B1A02:12 Speaker #2: Circuit Set by the ACM when a short to voltage is detected on the RHF door or RHF Short To Battery A-pillar tweeter speaker circuits. When DTC B1A02:12 is set, the speaker output is disabled. B1A02:13 Speaker #2: Circuit Set by the ACM when an open is detected on the RHF door or RHF A-pillar Open tweeter speaker circuits.

Original table alignment retained · Scroll horizontally if needed

Possible Sources

Speaker Wiring, terminals, or connectors ACM

PINPOINT TEST K : THE RHF (RIGHT-HAND FRONT) DOOR SPEAKER IS INOPERATIVE

K1 CHECK THE AUDIO SIGNAL TO THE RHF (RIGHT-HAND FRONT) DOOR SPEAKER

Ignition OFF. Disconnect: RHF Door Speaker C612. Operate the audio system in AM/ FM mode. Measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C612-1		C612-4

DTC Fault Trigger Conditions — original illustration 1, reference 4159Original colors & callouts · Select to enlarge

Is a fluctuating AC voltage present?

Yes	INSTALL a new RHF door speaker. REFER to: Front Door Speaker RH (415-00A Information and Entertainment System - General Information - Vehicles With: AM/FM/CD/SYNC, Removal and Installation).
No	GO to K2

K2 CHECK THE AUDIO CIRCUITS TO THE RHF (RIGHT-HAND FRONT) DOOR SPEAKER FOR A SHORT TO VOLTAGE

Ignition OFF. Disconnect: ACM C240A. Disconnect: RHF A-Pillar Tweeter Speaker C9065. Ignition ON. Measure:

Source reference 4159

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.