Is the concern still present?

Damaged or bent pins (install new terminals or pins) Pushed-out pins (install new pins as necessary)

Reconnect the ACM connectors. Make sure they seat and latch correctly. Operate the system and determine if the concern is still present.

Yes	CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new ACM. REFER to: Audio Front Control Module (ACM) (415-00A Information and Entertainment System - General Information - Vehicles With: AM/FM/CD/SYNC, Removal and Installation).
No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

Yes

CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new ACM. REFER to: Audio Front Control Module (ACM) (415-00A Information and Entertainment System - General Information - Vehicles With: AM/FM/CD/SYNC, Removal and Installation).

The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

U0100:00

Normal Operation and Fault Conditions

REFER to: Information and Entertainment System - System Operation and Component Description (415-00A Information and Entertainment System - General Information - Vehicles With: AM/FM/CD/SYNC, Description and Operation). See Network Message Chart.

DTC Fault Trigger Conditions

Description	Fault Trigger Conditions
U0100:00 Lost Communication with ECM/ PCM "A": No Sub Type Information	Set by the ACM, DACMC, and GPSM when network messages are missing from the PCM for more than 5 seconds with the ignition in RUN.

Description

Fault Trigger Conditions

U0100:00 Lost Communication with ECM/

PCM "A": No Sub Type Information

Set by the ACM, DACMC, and GPSM when network messages are missing from the PCM for more than 5 seconds with the ignition in RUN.

DTC

Possible Source

PCM

PINPOINT TEST AE : U0100:00

AE1 VERIFY THE CUSTOMER'S CONCERN

Ignition ON. Verify if there is an observable symptom present.

Is an observable symptom present?

Yes	GO to AE2
No	The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

AE2 RECHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0100:00

Source reference 4217

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.