Pinpoint Tests MD: Fuel Pressure Sensor And Fuel Delivery Pressure Switch: Introduction

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2018 Ford Transit-350 HD, 2018 Ford Transit-350, 2018 Ford Transit-250, 2018 Ford Transit-150, and 2018 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Regeneration may occur during normal operation. During regeneration, diagnostic procedures may display biased values. If a regeneration occurs during diagnostic procedures, allow the process to complete before continuing diagnostics.

This pinpoint test is intended to diagnose the following:

fuel delivery pressure switch (9S599)
fuel pressure and temperature sensor (9G756)
harness circuits: FDPS, FLP, GND, SIGRTN and VREF
PCM (12A650)

Fig 1: Fuel Delivery Pressure Switch Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
2	GND (Ground)
1	FDPS (Fuel Delivery Pressure Switch)

Fig 2: Fuel Pressure And Temperature Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
F-650/F-750, F-Series Super Duty	A	2 4 3	FLP SIGRTN VREF
F-150	B	2 3 1	FLP SIGRTN VREF

Fig 3: Powertrain Control Module-E (PCM-E) Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
34	FLP (Fuel Low Pressure)

Fig 4: Powertrain Control Module-T (PCM-T) Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
23	FDPS (Fuel Delivery Pressure Switch)