Fuel Rail Pressure And Temperature Sensor
WARNING: This page is about a different variant/trim than selected.
The FRPT sensor is located at the top of the fuel rail. The FRPT sensor is screwed into a threaded hole and sealed with a mating taper in the fuel rail.
The FRPT sensor has a 4-pin connector which is connected to the PCM through the engine harness.
The 4-pin connector provides the following connections:
- A 5V reference voltage from the PCM .
- A pressure signal input to the PCM .
- A temperature signal input to the PCM .
- A ground connection.
The FRPT sensor comprises a piezo-resistive type sensor containing an actuating diaphragm. Deflection of the diaphragm provides a proportional signal output voltage to the PCM , dependent on the fuel pressure within the fuel rail.
The temperature sensor is a NTC resistor sensor, which allows the PCM to determine the fuel temperature.