Section 79 (Engine Controls - Pin Voltage Charts): Introduction
WARNING: This page is about a different car, the 1994 Mercury Topaz and 1994 Ford Tempo. However, it is still accessible from the selected car via links, so may be relevant.
Pin voltage charts are used for diagnosing intermittent symptoms and faults that are unable to be resolved during self-diagnostics. Pin voltage testing ensures the Powertrain Control Module is receiving and transmitting proper voltage signals. Before attempting pin voltage diagnostics, ensure mechanical conditions have been thoroughly inspected and self-diagnostics has been attempted. Service bulletins may also be helpful in correcting a hard to diagnose problem.