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 R: DTC C2777 AND DTC C2778 - Sensor Cluster Bus Failure (Steps R1 & R2)
Courtesy of FORD MOTOR CO.
Fig 2: Pinpoint Test R: DTC C2777 AND DTC C2778 - Sensor Cluster Bus Failure (Steps R3-R5)
Courtesy of FORD MOTOR CO.
Fig 3: Pinpoint Test R: DTC C2777 AND DTC C2778 - Sensor Cluster Bus Failure (Steps R6 & R7)
Courtesy of FORD MOTOR CO.
Fig 4: Pinpoint Test R: DTC C2777 AND DTC C2778 - Sensor Cluster Bus Failure (Step R8)