Symptom Chart

2009 Mercury Milan Premier, 3.0 1, AWDSECTION Symptom Chart
WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
Symptom Chart

Condition Possible Sources Action
  • No communication with the instrument cluster
  • Fuse(s)
  • Circuitry
  • Instrument cluster
  • Incorrect fuel gauge indication
  • Circuitry
  • Fuel level sensor
  • Fuel pump module
  • Fuel tank
  • Instrument cluster
  • Incorrect temperature gauge indication
  • Powertrain control module (PCM)
  • Instrument cluster
  • The speedometer/odometer is inoperative
  • PCM (Escape, Mariner)
  • Transmission control module (TCM) (Hybrid)
  • Instrument cluster
  • Inaccurate speedometer reading
  • PCM (Escape, Mariner)
  • TCM (Hybrid)
  • Instrument cluster
  • For Hybrid, VERIFY the PCM has the correct module configuration for the tire size. If the configuration is incorrect, REFER to MODULE CONFIGURATION article. If the configuration for the PCM is correct, go to Pinpoint Test C .
  • The tachometer is inoperative
  • Instrument cluster
  • The low fuel warning indicator is never/always on
  • Instrument cluster
  • The door ajar indicator is inoperative (chime is operative)/does not operate correctly
  • Instrument cluster
  • CHECK the operation of the interior lamps.
    • If the interior lamps operate correctly, INSTALL a new instrument cluster. REFER to Instrument Cluster . TEST the system for normal operation.
    • If the interior lamps do not operate correctly, REFER to INTERIOR LIGHTING article.
  • The safety belt warning indicator is inoperative (chime is operative)/does not operate correctly
  • Instrument cluster
  • CHECK the operation of the safety belt warning chime.
    • If the chime is operative, INSTALL a new instrument cluster. REFER to Instrument Cluster . TEST the system for normal operation.
  • The check fuel cap indicator is never on
  • PCM
  • Instrument cluster
  • The check fuel cap indicator is always on
  • PCM (Hybrid)
  • Instrument cluster
  • CHECK for any DTCs.
    • If DTCs are present, REFER to the appropriate DTC chart to continue diagnosis.
    • If no DTCs are present, INSTALL a new instrument cluster. REFER to Instrument Cluster . TEST the system for normal operation.
  • The anti-lock brake system (ABS) warning indicator is never/always on
  • ABS module
  • Instrument cluster
  • The brake warning indicator is never/always on
  • Circuitry
  • Brake fluid level switch
  • Parking brake switch
  • ABS module
  • Smart junction box (SJB)
  • Instrument cluster
  • The low oil pressure warning indicator is never/always on (Escape, Mariner)
  • Circuitry
  • Oil pressure switch
  • Low oil pressure
  • Instrument cluster
  • The low oil pressure warning indicator is never/always on (Hybrid)
  • Circuitry
  • Oil pressure switch
  • Low oil pressure
  • Tachometer
  • Instrument cluster
  • The malfunction indicator lamp (MIL) is never/always on
  • PCM
  • Instrument cluster
  • The charging system warning indicator is never/always on
  • Charging system
  • PCM
  • Instrument cluster
  • The air bag warning indicator is never/always on
  • Circuitry
  • Restraints control module (RCM)
  • Instrument cluster
  • The high beam indicator is never/always on
  • SJB
  • Instrument cluster
  • The LH turn indicator is never/always on
  • Circuitry
  • SJB
  • Instrument cluster
  • The RH turn indicator is never/always on
  • Circuitry
  • SJB
  • Instrument cluster
  • The anti-theft indicator is never/always on
  • PCM
  • Instrument cluster
  • The four wheel drive (4WD) indicator is never/always on (Escape, Mariner)
  • 4WD control module
  • Instrument cluster
  • The 4X4 ENGAGED message is never/always on (Hybrid)
  • Circuitry
  • 4WD control module
  • Instrument cluster
  • The speed control indicator is never/always on (Escape, Mariner)
  • Circuitry
  • Speed control actuator
  • Instrument cluster
  • The speed control ON message is never on (Hybrid)
  • PCM
  • Instrument cluster
  • The O/D OFF indicator is never/always on (Escape, Mariner)
  • PCM
  • Instrument cluster
  • The transmission range indicator does not operate correctly
  • PCM
  • Instrument cluster
  • The electric power charge/assist gauge is inoperative (Hybrid)
  • Traction battery control module (TBCM)
  • Instrument cluster
  • The hazard warning indicator is inoperative (Hybrid)
  • PCM
  • Instrument cluster
  • TBCM
  • TCM
  • The overtemp warning indicator is inoperative (Hybrid)
  • PCM
  • Instrument cluster
  • The service soon warning indicator is inoperative (Hybrid)
  • PCM
  • Instrument cluster
  • The tire pressure monitoring system (TPMS) warning indicator is never/always on
  • SJB
  • Instrument cluster
  • The instrument cluster is inoperative
  • Fuse(s)
  • Circuitry
  • Instrument cluster
RENDER: 1.0x

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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.