2004 Ford Freestar BaseFACTORY OEM SERVICE PROCEDURE

Symptom Chart

WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
MODULE COMMUNICATIONS NETWORK SYMPTOM CHART

Condition Possible Sources Action
  • The powertrain control module (PCM) does not respond to the diagnostic tool
  • Circuit or connection in the controller area network (CAN)
  • PCM
  • The instrument cluster does not respond to the diagnostic tool
  • Circuit or connection in the controller area network (CAN)
  • Instrument cluster
  • The restraint control module (RCM) does not respond to the diagnostic tool
  • Circuit or connection in the International Standards Organization (ISO) 9141 communications network
  • RCM
  • The anti-lock brake system (ABS) module does not respond to the diagnostic tool
  • Circuit or connection in the International Standards Organization (ISO) 9141 communications network
  • ABS module
  • The vehicle security module does not respond to the diagnostic tool
  • Circuit or connection in the International Standards Organization (ISO) 9141 communications network
  • Vehicle security module
  • No controller area network (CAN) communication
  • Circuit or connection in the CAN
  • CAN modules
  • No International Standards Organization (ISO) 9141 communications network communication
  • Circuit or connection in the ISO 9141 communications network
  • ISO 9141 communications network modules
  • No module/network communication - no power to the diagnostic tool
  • Battery junction box (BJB) fuse 18 (60A)
  • Central junction box (CJB) fuse 26 (20A)
  • Data link connector (DLC) C251 pins
  • Diagnostic tool
  • Circuitry
Factory Service Tools

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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.