Operation CHARM: Car repair manuals for everyone.
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Test A: Poor Reception - AM/FM

PINPOINT TEST A: POOR RECEPTION - AM/FM

Normal Operation
For MKZ, the radio antenna, integral to the rear window, receives AM and FM radio waves. The antenna module sends the radio waves to the audio control module (ACM) through the antenna cable.

For Fusion and Milan, the antenna receives AM and FM radio waves and transmits them to the ACM through the antenna cable.

For all vehicles, the noise suppression equipment reduces engine ignition and electrical systems interference transmitted through the speakers.

- DTC B2103 (Antenna Not Connected) - sets during the antenna connected test (part of the ACM self-test) when the signal strength is less than the pre-configured threshold value. In order for this DTC to set, the ACM must be tuned to AM, and the self-test must be run with the scan tool.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors (MKZ only)
- Antenna
- Antenna cable
- Charging system
- Ignition system
- Antenna module (MKZ only)
- Noise suppression equipment
- ACM


A1-A3:






A4-A10:






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A14-A16: