Symptom Chart

2009 Mercury Milan Premier, 3.0 1, AWDSECTION Symptom Chart
WARNING: This page is about a different car, the 2009 Ford Mustang. 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
  • Audio control module (ACM)
  • No communication with the satellite digital audio receiver system (SDARS) module
  • Fuse
  • Wiring, terminals or connectors
  • ACM
  • The satellite audio is inoperative/does not operate correctly
  • Subscription status
  • Wiring, terminals or connectors
  • SDARS module
  • ACM
  • The ACM backlighting does not operate correctly
  • Wiring, terminals or connectors
  • ACM
  • Poor reception - AM/FM
  • Antenna
  • Antenna cable(s)
  • Charging system
  • Ignition system
  • Noise suppression equipment
  • ACM
  • Poor reception - satellite audio
  • Obstructions to the line of sight
  • DRIVE the vehicle to an open area and TEST the reception.
    • If the reception is OK, INFORM the customer that the satellite signal can be affected by obstructions to the satellite antenna line of sight.
 
  • Satellite radio antenna
  • Satellite radio antenna cable
  • SDARS module
  • Continuous seek/scan in AM/FM
  • RDS/PTY function setting
  • VERIFY the RDS/PTY function is set to ALL. REFER to the Owner's Literature. SCAN for a good channel.
    • If a good channel is found, the cause of the concern was that no channel in the selected category was found. The system is OK.
 
  • Antenna cable(s)
  • Noise suppression equipment
  • Antenna
  • ACM
  • Poor quality/distorted/no sound from one or more speakers (not all speakers) - except subwoofers
  • Wiring, terminals or connectors
  • Speaker
  • ACM
  • Poor quality/distorted/no sound from all speakers
  • Wiring, terminals or connectors
  • ACM
  • With the key in any position except START, MEASURE the voltage between the ACM C290d-15, circuit 1000 (RD/BK), harness side and ground.
    • If any voltage is present, REPAIR the circuit. TEST the system for normal operation.
  • The subwoofer is inoperative/does not operate correctly - front subwoofers
  • Fuse
  • Wiring, terminals or connectors
  • Subwoofer amplifier
  • Front subwoofer
  • ACM
  • The subwoofer is inoperative/does not operate correctly - rear subwoofers
  • Fuse
  • Wiring, terminals or connectors
  • Subwoofer amplifier
  • Rear subwoofer
  • ACM
  • Loud popping sound when cycling the ignition switch
  • Fuse
  • Wiring, terminals or connectors
  • Subwoofer amplifier
  • ACM
  • The speed sensitive volume does not operate correctly.
  • Speed sensitive volume setting
  • Vehicle speed sensor (VSS) signal concern
  • ACM
  • The audio input jack is inoperative/does not operate correctly
  • Wiring, terminals or connectors
  • Audio input jack
  • ACM
Symptom Chart - Navigation

Condition Possible Sources Action
  • No global positioning system (GPS) antenna signal
  • GPS antenna
  • Audio control module (ACM)
  • Navigation screen only displays Dearborn, Michigan
  • GPS antenna
  • The position cursor is inaccurate
  • Wheel pulse data concern
  • ACM
  • The audible switch feedback is inoperative
  • Audible switch feedback setting
  • ACM
  • The voice guidance is inoperative/does not operate correctly
  • Incorrect system setting
  • ACM
  • The display screen is inoperative
  • ACM
  • VERIFY the operation of the AM/FM audio system.
    • If the AM/FM system operates correctly, INSTALL a new ACM. REFER to Audio Control Module (ACM) . TEST the system for normal operation.
  • 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.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.