Electronic Throttle Control (Except Econoline)

The Electronic Throttle Control (ETC) combines the Accelerator Pedal (AP) sensor and Idle Validation Switch (IVS) into a single unit. AP sensor function provides PCM with driver's demand for power. ETC sensor portion is a 3-wire potentiometer that receives VREF from PCM and returns a signal to PCM proportional to accelerator pedal position. ETC signal is used in calculating fuel quantity. Also, ETC input is used by PCM to control Exhaust Back-Pressure (EBP) regulator. EBP system is not used on F650-750. Idle validation function verifies when accelerator pedal is in idle position. This switch protects against in-range failure of ETC sensor. A PCM detected fault of ETC sensor will illuminate MIL in instrument cluster. An ETC signal that is detected out of range (high or low) will cause PCM to only allow engine to operate at low idle.