Symptom Chart - Sound Quality

WARNING: This page is about a different car, the 2012 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

SOUND QUALITY

Condition	Possible Sources	Action
Poor reception - AM/FM	Wiring, terminals or connectors Antenna Antenna cable Charging system Ignition system Noise suppression equipment Audio Front Control Module (ACM)	GO to PINPOINT TEST A .
Poor reception - satellite radio	Obstructions to the antenna line of sight Antenna Satellite radio antenna cable ACM	GO to PINPOINT TEST K .
Continuous seek/scan - AM/FM	No channel found in the selected category Antenna Antenna cable Noise suppression equipment ACM	GO to PINPOINT TEST A .
Continuous seek/scan - satellite radio	Obstructions to the antenna line of sight Antenna Satellite radio antenna cable ACM	GO to PINPOINT TEST K .
Poor sound quality/no sound while in satellite radio mode - all other functions operate correctly	Satellite radio antenna Satellite radio antenna cable ACM	GO to PINPOINT TEST K .
No sound from one or more speakers (not all speakers) - vehicles without Sony® sound	Fuse Wiring, terminals or connectors Speaker ACM	GO to PINPOINT TEST B .
No sound from one or more speakers (not all speakers) - Sony® sound	Wiring, terminals or connectors Speaker Audio Digital Signal Processing (DSP) module ACM	GO to PINPOINT TEST C .
No sound from all speakers	Wiring, terminals or connectors ACM	GO to PINPOINT TEST D .
The subwoofer is inoperative/does not operate correctly	Wiring, terminals or connectors Speaker ACM Audio DSP module	GO to PINPOINT TEST C .
Poor quality or no sound while in SYNC® mode	Wiring, terminals or connectors APIM ACM	GO to PINPOINT TEST O .
Poor sound quality or distorted sound from one or more speakers (not all speakers)	Wiring, terminals or connectors Speaker(s) Loose trim panel fasteners Loose trim panels Loose speaker grille Loose harnesses Loose items in storage areas Loose harness fasteners Loose door and handle lock components Loose component fasteners Watershield bonding and placement Subwoofer enclosure	GO to PINPOINT TEST BC