WARNING: This page is about a different car, the 2003 Mercury Sable and 2003 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Diagnosis Procedure - Symptom Chart (1 Of 2)
Courtesy of FORD MOTOR CO.
Fig 2: Diagnosis Procedure - Symptom Chart (2 Of 2)