Pinpoint Test Dd: Fuel Pressure, Fuel Rail Pressure (FRP) And Fuel Rail Pressure Temperature (FRPT) Sensors: Introduction
WARNING:
VEHICLE FUEL SYSTEMS ARE PRESSURIZED EVEN WHEN THE ENGINE IS NOT RUNNING. TO AVOID FIRE OR PERSONAL INJURY, DISABLE THE FUEL DELIVERY SYSTEM AND RELIEVE FUEL SYSTEM PRESSURE BEFORE REMOVING ANY FUEL SYSTEM COMPONENT. REFER TO THE FUEL SYSTEM INFORMATION AT THE BEGINNING OF PINPOINT HC
. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY.
NOTE:
With the engine running, the FRP PID value may be 48-70 kPa (7-10 psi) higher than a fuel pressure reading taken with a mechanical gauge.
This pinpoint test is intended to diagnose the following:
- fuel pressure sensor (9F972)
- fuel rail pressure (FRP) sensor (6B288)
- fuel rail pressure temperature (FRPT) sensor (9G756)
- harness circuits: FLP, FRP, FRP-PFI and FRT
- PCM (12A650)
Tables and Graphs
FRP SENSOR VOLTAGE AND PRESSURE SPECIFICATIONS
| Voltage | Pressure, MPa (gauge) | Pressure, psi (gauge) |
|---|---|---|
| 4.80 | 27.95 | 4054 |
| 4.50 | 26 | 3771 |
| 3.50 | 19.5 | 2828 |
| 2.50 | 13.0 | 1885 |
| 1.50 | 6.5 | 943 |
| 0.50 | 0 | 0 |
| 0.20 | -1.95 | -283 |
FRPT SENSOR VOLTAGE AND PRESSURE SPECIFICATIONS
| Voltage | Pressure (kPa) | Pressure (psi) |
|---|---|---|
| 4.5 | 482 | 70 |
| 3.9 | 413 | 60 |
| 3.4 | 344 | 50 |
| 2.8 | 275 | 40 |
| 2.2 | 207 | 30 |
| 1.6 | 138 | 20 |
| 1.1 | 69 | 10 |
| 0.5 | 0 | 0 |
FRPT SENSOR TEMPERATURE, VOLTAGE, AND RESISTANCE SPECIFICATIONS
| Temperature | Sensor | ||
|---|---|---|---|
| °C | °F | Volts | K Ohms |
| 100 | 212 | 0.47 | 2.073 |
| 95 | 203 | 0.54 | 2.405 |
| 90 | 194 | 0.61 | 2.800 |
| 85 | 185 | 0.70 | 3.273 |
| 80 | 176 | 0.80 | 3.840 |
| 75 | 167 | 0.92 | 4.524 |
| 70 | 158 | 1.06 | 5.351 |
| 65 | 149 | 1.21 | 6.356 |
| 60 | 140 | 1.38 | 7.584 |
| 55 | 131 | 1.56 | 9.091 |
| 50 | 122 | 1.77 | 10.949 |
| 45 | 113 | 1.99 | 13.252 |
| 40 | 104 | 2.23 | 16.123 |
| 35 | 95 | 2.48 | 19.720 |
| 30 | 86 | 2.74 | 24.253 |
| 25 | 77 | 3.00 | 30.000 |
| 20 | 68 | 3.26 | 37.332 |
| 15 | 59 | 3.50 | 46.745 |
| 10 | 50 | 3.73 | 58.911 |
| 5 | 41 | 3.95 | 74.745 |
| 0 | 32 | 4.13 | 95.501 |
| Pin | Circuit |
|---|---|
| 1 | FLP (Fuel Low Pressure) |
| 2 | SIGRTN (Signal Return) |
| 3 | VREF (Reference Voltage) |
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Continental 2.0L, Edge 2.0L, Explorer 2.3L, Focus 2.3L, Ford GT, MKC 2.3L, MKX 2.0L, Mustang |
A | 4 3 5 |
FRP SIGRTN VREF |
| Escape/Kuga 2.0L, Explorer GTDI 3.5L, Fiesta, Flex, Focus GTDI 2.0L, Focus 1.0L, Fusion 2.0L, MKC 2.0L, MKT, MKZ 2.0L, Taurus |
B | 2 1 3 |
FRP SIGRTN VREF |
| Escape/Kuga 1.5L, Fusion 1.5L |
B | 3 2 1 |
FRP SIGRTN VREF |
| All other vehicles | C | 2 3 1 |
FRP SIGRTN VREF |
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Mustang | A | 5 2 4 3 |
FRT FRP SIGRTN VREF |
| All other vehicles | A | 5 2 4 3 |
FRT FRP-PFI SIGRTN VREF |
Powertrain Control Module (PCM) Connector
For PCM connector views or reference values, refer to REFERENCE VALUES .
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Continental 2.7L, Continental 3.0L, Edge 2.7L, Expedition, F-150 2.7L, Fusion 2.7L, MKZ 3.0L, Navigator |
198 PIN | E35 B71 |
FRP FLP |
| Escape/Kuga 1.5L | 198 PIN | E57 B62 |
FRP FLP |
| F-150 GTDI 3.5L | 198 PIN | E33 E21 E38 |
FRT FRP FRP-PFI |
| Fiesta, Focus 1.0L |
198 PIN | E38 B71 |
FRP FLP |
| Focus GDI 2.0L | 154 PIN | E9 E7 |
FRP FLP |
| Ford GT | 198 PIN | E67 E35 E37 |
FRT FRP FRP-PFI |
| Mustang 5.2L | 198 PIN | B44 B34 |
FRT FRP |
| Transit | 198 PIN | E35 | FRP |
| All other vehicles | 198 | PIN E37 B71 |
FRP FLP |