WARNING: This page is about a different car, the 2003 Lincoln Aviator. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Pinpoint Test U: No Communication With The Vehicle Security Module (Steps U1 & U2)
Courtesy of FORD MOTOR CO.
Fig 2: Pinpoint Test U: No Communication With The Vehicle Security Module (Steps U3 & U4)