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Diagnosis by Symptom Index Directions

WARNING: This page is about a different car, the 2009 Mercury Milan and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
  1. Using the Symptom Index, select the Concern/Symptom that best describes the condition.
  2. Refer to the routine indicated in the Diagnosis by Symptom Index.
  3. Always begin diagnosis of a symptom with:
    • preliminary inspections.
    • verifications of condition.
    • checking the transmission fluid level.
    4. NOTE: Not all concerns and conditions with electrical components will set a DTC. Be aware that the components listed may still be the cause. Verify correct function of these components prior to proceeding to the Hydraulic/Mechanical Routine listed.
  4. Begin with the Electrical Routine, if indicated. Follow the reference or action statements. Always carry out the On-Board Diagnostic (OBD) tests as necessary. Never skip steps. If the concern is still present after electrical diagnosis, then proceed to the Hydraulic/Mechanical Routine listed.
  5. The Hydraulic/Mechanical Routines list possible hydraulic or mechanical components that could cause the concern. These components are listed in the removal sequence and by most probable cause. All components listed must be inspected to make sure of correct repair.
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