Symptom Chart

WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

Symptom Chart - Audio System

Condition	Possible Sources	Action
No communication with the audio control module (ACM)	Fuse Wiring, terminals or connectors ACM	REFER to MODULE COMMUNICATIONS NETWORK article.
No communication with the satellite digital audio receiver system (SDARS) module	Fuse Wiring, terminals or connectors SDARS module	REFER to MODULE COMMUNICATIONS NETWORK article.
No communication with the accessory protocol interface module (APIM)	Fuse Wiring, terminals or connectors APIM	REFER to MODULE COMMUNICATIONS NETWORK article.
No communication with the audio digital signal processing (DSP) module	Fuse Wiring, terminals or connectors DSP module	REFER to MODULE COMMUNICATIONS NETWORK article.
The satellite audio is inoperative/does not operate correctly	Subscription status Wiring, terminals or connectors APIM (if equipped) SDARS module ACM	Go to Pinpoint Test H .
The ACM display is blank, but the ACM operates	ACM	INSTALL a new ACM. REFER to Audio Control Module (ACM) - Fusion, Milan or Audio Control Module (ACM) - MKZ . TEST the system for normal operation.
The ACM back lighting does not operate correctly	Back lighting system concern Wiring, terminals or connectors ACM	REFER to INSTRUMENT CLUSTER AND PANEL ILLUMINATION article to continue diagnosis of a single illumination source inoperative.
The CD player is inoperative/does not operate correctly	CD ACM	INSPECT the CD for scratches, fingerprints, a loose paper label, incorrect format, or damage. INSERT a known good CD and TEST the system. If the system operates correctly, the concern was caused by a damaged CD. If the system does not operate correctly, INSTALL a new ACM. REFER to Audio Control Module (ACM) - Fusion, Milan or Audio Control Module (ACM) - MKZ . TEST the system for normal operation.
Poor reception - AM/FM	Wiring, terminals or connectors (MKZ only) Antenna Antenna cable Charging system Ignition system Noise suppression equipment Antenna module (MKZ only) ACM	Go to Pinpoint Test A .
Poor reception - satellite audio	Obstructions to the line of sight Satellite antenna Satellite antenna cable SDARS module	Go to Pinpoint Test I .
No sound while in satellite radio mode	Satellite radio antenna Satellite radio antenna cable SDARS module	Go to Pinpoint Test I .
Continuous seek/scan in AM/FM	RDS/PTY function setting Antenna Antenna cable Noise suppression equipment ACM	Go to Pinpoint Test A .
Poor quality/distorted/no sound from one or more speakers (not all speakers) - except THX® audio system	Wiring, terminals or connectors Speaker ACM	Go to Pinpoint Test B .
Poor quality/distorted/no sound from one or more speakers (not all speakers) - THX® audio system	Fuse Wiring, terminals or connectors Speaker Subwoofer speaker Audio digital signal processing (DSP) module ACM	Go to Pinpoint Test C .
Poor quality/distorted/no sound from all speakers - except THX® audio system	Wiring, terminals or connectors ACM	NOTE: If DTC B2965 is set in the ACM, the cause of the concern is a short to ground or short to voltage in the circuitry to an individual speaker. Go to Pinpoint Test B . With the key in any position except START, MEASURE the voltage between the ACM C290a-15, circuit CBP13 (GY/BN), harness side and ground. If any voltage is present, REPAIR the circuit. TEST the system for normal operation. If no voltage is present, INSTALL a new ACM. REFER to Audio Control Module (ACM) - Fusion, Milan or Audio Control Module (ACM) - MKZ . TEST the system for normal operation.
Poor quality/distorted/no sound from all speakers - THX® audio system	Fuse Wiring, terminals or connectors DSP module ACM	Go to Pinpoint Test D .
Poor quality/distorted/no sound while in SYNC mode	Wiring, terminals or connectors APIM ACM	Go to Pinpoint Test U .
The subwoofer is inoperative/does not operate correctly - Audiophile	Fuse Wiring, terminals or connectors Subwoofer speaker Subwoofer amplifier ACM	Go to Pinpoint Test E .
The subwoofer is inoperative/does not operate correctly - THX® audio system	Fuse Wiring, terminals or connectors Speaker Subwoofer speaker DSP module ACM	Go to Pinpoint Test C .
Loud popping sound when cycling the ignition switch	Fuse Wiring, terminals or connectors Subwoofer amplifier (Audiophile) DSP module (THX® audio system) ACM	Go to Pinpoint Test F .
The steering wheel controls are inoperative/do not operate correctly	Wiring, terminals or connectors Clockspring Steering wheel controls ACM APIM (if equipped)	Go to Pinpoint Test G .
The speed sensitive volume does not operate correctly	Speed sensitive volume setting Vehicle speed sensor (VSS) signal concern ACM	Go to Pinpoint Test Q .
The audio input jack is inoperative/does not operate correctly	Wiring, terminals or connectors Audio input jack ACM APIM (if equipped)	Go to Pinpoint Test J .
The audio does not reduce when the parking aid tone sounds	Parking aid system concern ACM	Go to Pinpoint Test N .
Voice recognition is inoperative/does not operate correctly - vehicles without the SYNC system	Fuse Wiring, terminals or connectors Microphone (part of interior rear view mirror) Steering wheel controls ACM	Go to Pinpoint Test P .
Voice recognition is inoperative/does not operate correctly - vehicles with the SYNC system	Fuse Wiring, terminals or connectors Microphone (part of interior rear view mirror) Steering wheel controls ACM (if equipped with navigation) APIM	Go to Pinpoint Test V .

Symptom Chart - Navigation

Condition	Possible Sources	Action
No global positioning system (GPS) antenna signal	GPS antenna ACM	Go to Pinpoint Test K .
Navigation screen only displays Dearborn, Michigan	GPS antenna	Go to Pinpoint Test K .
The position cursor is inaccurate	GPS antenna Vehicle speed sensor (VSS) signal concern ACM	Go to Pinpoint Test O .
The audible switch feedback is inoperative	Audible switch feedback setting ACM	Go to Pinpoint Test L .
The voice guidance is inoperative/does not operate correctly	Incorrect system setting Wiring, terminals or connectors (THX® only) DSP module (if equipped) ACM	Go to Pinpoint Test M .
The display screen is inoperative	ACM	VERIFY the operation of the AM/FM audio. If the AM/FM audio system does not operate correctly, go to Symptom Chart - Audio System . If the AM/FM audio system operates correctly, INSTALL a new ACM. REFER to Audio Control Module (ACM) - Fusion, Milan or Audio Control Module (ACM) - MKZ . TEST the system for normal operation.
Unable to insert or eject map disc	Map DVD ACM	REMOVE the map DVD and CLEAN it. INSPECT for scratches, fingerprints, or damage. If the map DVD is damaged, REPLACE the map DVD. If no damage is found, INSERT a known good map DVD. TEST the system. If the system operates correctly, the concern was caused by a damaged or inoperable map DVD. If the system does not operate correctly, INSTALL a new ACM. REFER to Audio Control Module (ACM) - Fusion, Milan or Audio Control Module (ACM) - MKZ . TEST the system for normal operation.
The screen does not open/close	Trim panel interference ACM	INSPECT the instrument panel center trim panel for interference with the navigation screen, and REPAIR as necessary. If no interference is found, INSTALL a new ACM. REFER to Audio Control Module (ACM) - Fusion, Milan or Audio Control Module (ACM) - MKZ . TEST the system for normal operation.
Voice recognition is inoperative/does not operate correctly - vehicles without the SYNC system	Fuse Wiring, terminals or connectors Microphone (part of interior rear view mirror) Steering wheel controls ACM	Go to Pinpoint Test P .
Voice recognition is inoperative/does not operate correctly - vehicles with the SYNC system	Fuse Wiring, terminals or connectors Microphone (part of interior rear view mirror) Steering wheel controls ACM (if equipped with navigation) APIM	Go to Pinpoint Test V .

Symptom Chart - SYNC System

Condition	Possible Sources	Action
The SYNC system is completely inoperative	Audio system concern Communication network concern Customer error Customer device APIM	Go to Pinpoint Test R .
Unable to pair Bluetooth® device	Incompatible Bluetooth® device Customer error Customer Bluetooth® device APIM	Go to Pinpoint Test S .
An individual Bluetooth® device feature is inoperative	Customer device compatibility	NOTE: If a Bluetooth® device is able to pair with the SYNC system, there are no concerns with the APIM. INSTRUCT the customer to review the device compatibility list on the SyncMyRide website . Not all phone features are available through the SYNC system. This is normal operation.
The universal serial bus (USB) port is inoperative/does not operate correctly	Customer USB device USB cable and port APIM	Go to Pinpoint Test T .
The steering wheel controls are inoperative/do not operate correctly	Wiring, terminals or connectors Clockspring Steering wheel controls ACM APIM	Go to Pinpoint Test G .
The audio input jack is inoperative/does not operate correctly	Wiring, terminals or connectors Audio input jack ACM APIM	Go to Pinpoint Test J .
The SYNC system audible prompts are inoperative/do not operate correctly	Wiring, terminals or connectors Customer setting ACM APIM	NOTE: The audible prompts include the text-to-speech (TTS) feature, voice prompts, and ring tones. Go to Pinpoint Test W .
During a phone call, no incoming audio is heard in the vehicle	Wiring, terminals or connectors Customer setting ACM APIM	Go to Pinpoint Test W .
Voice recognition is inoperative/does not operate correctly	Fuse Wiring, terminals or connectors Microphone (part of interior rear view mirror) Steering wheel controls ACM (if equipped with navigation) APIM	Go to Pinpoint Test V .
During a phone call, no outgoing audio is heard on the outside device	Fuse Wiring, terminals or connectors Microphone (part of interior rear view mirror) APIM	Go to Pinpoint Test V .