Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
1-30 Description and Operation
Engine Control Components
resistance affects the voltage drop across the sensor terminals and provides electrical voltage signals to the PCM corresponding to temperature.
The pressure component of the FRPT sensor provides a signal to the PCM indicating fuel rail pressure. The PCM supplies a 5 volt reference (VREF) signal, as well as supplying 5 volts on the FRP circuit. As pressure increases, the sensor signal voltage decreases.
The FRPT sensor measures the pressure and temperature of the fuel in the fuel rail and sends these signals to the PCM. The PCM uses the fuel pressure and temperature sensor inputs to command the correct fuel pump speed. The relationship between the fuel pressure and the fuel temperature is also used to determine the possible presence of fuel vapor in the fuel rail. The FRPT sensor is located at the top of the left fuel rail.
Typical FRPT Sensor
Fuel Tank Pressure (FTP) Sensor
The in tank FTP sensor or the inline FTP sensor measures the fuel tank pressure.
Typical In Tank FTP Sensor
2016 Powertrain Control/Emissions Diagnosis, Gasoline Engines, 3/2015
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.