Symptom Chart

WARNING: This page is about a different car, the 2008 Mercury Sable, 2008 Ford Taurus X, and 2008 Ford Taurus. 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 rear entertainment module (RETM)	Fuse Wiring, terminals or connectors RETM	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.
The ACM backlighting does not operate correctly	Backlighting system concern Wiring, terminals or connectors ACM	REFER to INSTRUMENT CLUSTER AND PANEL ILLUMINATION article.
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) . TEST the system for normal operation.
Poor reception - AM/FM	Wiring, terminals or connectors (sedan only) Antenna Antenna cable Antenna module (sedan only) Charging system Ignition system Noise suppression equipment ACM	Go to Pinpoint Test A .
Continuous seek/scan in AM/FM	RDS/PTY function setting Wiring, terminals or connectors (sedan only) Antenna Antenna cable Antenna module (sedan only) Noise suppression equipment 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 H .
No sound while in satellite radio mode	Satellite antenna Satellite antenna cable SDARS module	Go to Pinpoint Test H .
The satellite audio is inoperative/does not operate correctly - vehicles without DVD entertainment	Subscription status Wiring, terminals or connectors SDARS module APIM (if equipped) ACM	Go to Pinpoint Test I .
The satellite audio is inoperative/does not operate correctly - vehicles with DVD entertainment	Subscription status Wiring, terminals or connectors RETM APIM (if equipped) SDARS module ACM	Go to Pinpoint Test J .
Poor quality/distorted/no sound from one or more speakers (not all speakers)	Wiring, terminals or connectors Speaker RETM (if equipped) ACM	Go to Pinpoint Test B .
Poor quality/distorted/no sound from all speakers	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 C240a-15, circuit CBP28 (GY/VT), harness side and ground. If voltage is present, REPAIR the circuit for a short to voltage. TEST the system for normal operation. If no voltage is present, INSTALL a new ACM. REFER to Audio Control Module (ACM) . TEST the system for normal operation.
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 amplifier Subwoofer speaker ACM	Go to Pinpoint Test C .
The video system is inoperative/does not operate correctly - no video	Damaged DVD RETM setting RETM	Go to Pinpoint Test G .
The video system does not operate correctly - no audio	Wiring, terminals or connectors RETM ACM	Go to Pinpoint Test G .
The video system remote control does not function correctly	Remote control batteries Video system concern	INSTALL new batteries in the remote control. TEST the system for normal operation. If the concern is still present, CONTACT an authorized audio repair facility for further diagnostic test procedures.
No auxiliary headphone audio	Headphones RETM	NOTE: When set to channel B, only DVD audio and auxiliary audio sources (such as a gaming system) can be sent to the headphones. NOTE: Be sure both sets of headphones have fresh batteries. TEST the system with both sets of headphones. If only one set of headphones has no audio, REPLACE the inoperative headphones. TEST the system for normal operation. If both sets of headphones are inoperative, INSTALL a new RETM. REFER to Rear Entertainment Module (RETM) . TEST the system for normal operation.
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 E .
The speed sensitive volume does not operate correctly	Speed sensitive volume setting Vehicle speed sensor (VSS) signal concern ACM	Go to Pinpoint Test F .
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 K .
The audio does not reduce when the parking aid tone sounds	Parking aid system concern ACM	Go to Pinpoint Test D .
Voice recognition is inoperative/does not operate correctly - vehicles without the SYNC system	Fuse Wiring, terminals or connectors Steering wheel controls Microphone (part of the interior rear view mirror) ACM	Go to Pinpoint Test P .
Voice recognition is inoperative/does not operate correctly - vehicles with the SYNC system	Fuse Wiring, terminals or connectors Steering wheel controls Microphone (part of the interior rear view mirror) 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 L .
Navigation screen only displays Dearborn, Michigan	GPS antenna	Go to Pinpoint Test L .
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 M .
Unable to read map disc	Map DVD ACM	REMOVE the map DVD and CLEAN it. INSPECT for scratches, fingerprints, or damage, and REPAIR as necessary. VERIFY a valid map DVD is being used. If no concern 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) . 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) . TEST the system for normal operation.
The voice guidance is inoperative/does not operate correctly	Incorrect system setting ACM	Go to Pinpoint Test N .
The display screen is inoperative	Wiring, terminals or connectors ACM	VERIFY the operation of the AM/FM audio system. 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) . 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 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 Q .
Unable to pair Bluetooth® device	Incompatible Bluetooth® device Customer error Customer Bluetooth® device APIM	Go to Pinpoint Test R .
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. Not all phone features are available through SYNC. 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 S .
The steering wheel controls are inoperative/do not operate correctly	Wiring, terminals or connectors Clockspring Steering wheel controls ACM APIM	Go to Pinpoint Test E .
The audio input jack is inoperative/does not operate correctly	Wiring, terminals or connectors Audio input jack ACM APIM	Go to Pinpoint Test K .
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 T .
During a phone call, no incoming audio is heard in the vehicle	Wiring, terminals or connectors Customer setting ACM APIM	Go to Pinpoint Test T .
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 .