which would prevent data from being transmitted through — 2016 workshop reference 4488

DTC Description Fault Trigger Conditions DTC Type Antenna U1A00:87 Private Set by the APIM when it sends a request over the On-demand Communication HS-CAN3 to the ACM and does not receive a valid Network: Missing response from the ACM on the SDL circuits in five Message seconds with at least three retries, or if there is a fault which would prevent data from being transmitted through any of the following: Satellite radio coaxial cable between the ACM and satellite radio/ GPS splitter Satellite radio/GPS splitter Rear satellite radio/GPS coaxial cable Antenna

Original table alignment retained · Scroll horizontally if needed

Possible Sources

Obstructions in the GPS antenna's line of sight GPS coaxial cable between the APIM and satellite radio/ GPS splitter Satellite radio/GPS splitter Rear satellite radio/GPS coaxial cable Satellite radio/GPS antenna Corrosion ACM APIM

PINPOINT TEST AF : NAVIGATION IS INOPERATIVE OR DOES NOT OPERATE CORRECTLY

AF1 CHECK THE GPS (GLOBAL POSITIONING SYSTEM) ANTENNA RECEPTION

Ignition ON. Access Bezel Diagnostics. REFER to: Bezel Diagnostics (415-00B Information and Entertainment System - General Information - Vehicles With: Touchscreen Display, General Procedures). Monitor the "Number of Satellites" and "Fix Mode" in APIM Location Information. If the values read less than 3 for "Number of Satellites" or "No GPS Fix" for "Fix Mode," drive the vehicle to an outdoor location that is free from obstacles such as tall buildings or large trees until at least 3 satellites are listed for "Number of Satellites" and "3D" is listed for "Fix Mode."

Can 3 or more satellites and a 3D fix be obtained?

Yes	GO to AF2
No	GO to AF4

AF2 CHECK NAVIGATION FOR CORRECT OPERATION

Operate various navigation features (including a short, guided route) and observe their functionality.

Does navigation operate correctly?

Yes	The system is operating correctly at this time. The concern was a result of obstructions in the antenna's line of sight for an extended period of time.
No	GO to AF3

Source reference 4488

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.