Peripheral Inputs
WARNING: This page is about a different car, the 2002 Ford Pickup and 2002 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Some signals may require certain peripherals or auxiliary tools to aid in diagnostics. In some cases, these devices can be inserted into the measurement jacks of the scan tool or DVOM. Scan tool is capable of recording value from measurement jacks on scan tool while storing value from other PIDs. For example, connecting an electronic fuel pressure gauge to monitor and record fuel pressure voltage reading, and capturing data, would help find the fault.