F 250 2WD Super Duty V8-7.3L DSL Turbo VIN F (1999)
Throttle Full Close Switch: Description and Operation
The Idle Validation Switch (IVS) provides the Powertrain Control Module (PCM) with a redundant signal to verify when the accelerator pedal and shaft
is in the idle position. Any detected malfunction of the IVS will illuminate the CHECK ENGINE light and the engine will operate at low idle only.
