Section 03-14: Engine Controls, Electronic | 1996 F-150, F-250, F-350, F-Super Duty Series and Bronco Vehicles Workshop Manual |
Diesel Engine
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 idle validation switch (IVS) will illuminate the Check Engine light and the engine will operate at low idle only.