F 450 4WD Super Duty V8-6.0L DSL Turbo VIN P (2003)
Accelerator Pedal Position Sensor: Description and Operation
Electronic Throttle Control (ETC)
Electronic Throttle Control (ETC)
The Electronic Throttle Control (ETC) provides the PCM with the driver's demand for power. The ETC sensor portion is a three-track potentiometer
that receives VREF from the PCM and returns a signal to the PCM directly proportional to the accelerator pedal position. The ETC signal is used in
calculating fuel quantity. If a signal sensor failure occurs, the PCM will default to the next sensor and continue operation. If multiple sensor failures
occur, the PCM will only allow the engine to operate at low idle.
A PCM detected fault of the ETC sensor will illuminate the Malfunction Indicator Lamp in the instrument cluster. An ETC signal that is detected out
of range, high or low, will cause the PCM to only allow the engine to operate at low idle.
