Pinpoint Tests 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 |
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| F-150 | A | 3 2 1 |
FLP SIGRTN VREF |
| All other vehicles | A | 1 2 3 |
FLP SIGRTN VREF |
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Aviator, Bronco Sport, Explorer 3.0L | A | 3 2 1 |
FRP SIGRTN VREF |
| Corsair, Escape/Kuga | B | 2 1 3 |
FRP SIGRTN VREF |
| EcoSport 1.0L | B | 2 3 1 |
FRP SIGRTN VREF |
| EcoSport 2.0L, Edge 2.7L, Nautilus 2.7L, Transit | C | 2 3 1 |
FRP SIGRTN VREF |
| Expedition High Output, Navigator High Output | D | 5 3 4 |
FRP SIGRTN VREF |
| Explorer 2.3L | A | 2 1 3 |
FRP SIGRTN VREF |
| F-150 2.7L, F-150 5.0L, Mustang 5.0L, Ranger | B | 3 2 1 |
FRP SIGRTN VREF |
| Transit Connect 1.0L | A | 1 2 3 |
FRP SIGRTN VREF |
| All other vehicles | D | 4 3 5 |
FRP SIGRTN VREF |
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Expedition, Ford GT | A | 5 2 4 3 |
FRT FRP-PFI SIGRTN VREF |
| F-150 2.7L, Navigator | A | 5 3 4 2 |
FRT FRP-PFI SIGRTN VREF |
| Mustang 5.0L, Mustang 5.2L Supercharged | B | 3 4 2 1 |
FRT FRP-PFI SIGRTN VREF |
| Mustang TiVCT 5.2L | A | 5 2 4 3 |
FRT FRP SIGRTN VREF |
| All other vehicles | B | 4 3 2 1 |
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 |
|---|---|---|---|
| Aviator, Explorer 3.0L | 306 PIN | E71 B10 |
FRP FLP |
| Bronco Sport 1.5L | 198 PIN | E22 E39 B73 |
FRT FRP FLP |
| Continental | 198 PIN | E37 B71 |
FRP FLP |
| EcoSport 1.0L Automatic Transmission, EcoSport 2.0L | 198 PIN | E37 | FRP |
| EcoSport 1.0L Manual Transmission | 198 PIN | E38 | FRP |
| Edge 2.0L, Nautilus 2.0L | 198 PIN | E37 B73 |
FRP FLP |
| Edge 2.7L | 306 PIN | E35 B25 |
FRP FLP |
| Escape/Kuga 1.5L | 198 PIN | E9 B73 |
FRP FLP |
| Expedition High Output, Navigator High Output | 198 PIN | E33 E21 E38 |
FRT FRP FRP-PFI |
| Expedition Base, Explorer 3.3L, Mustang 5.0L, Navigator Base, Transit TiVCT 3.5L | 306 PIN | E31 E71 E70 |
FRT FRP FRP-PFI |
| F-150 2.7L, F-150 3.3L, F-150 5.0L | 306 PIN | E69 E48 E77 |
FRT FRP FRP-PFI |
| F-150 3.5L | 306 PIN | E48 | FRP |
| Ford GT | 198 PIN | E67 E35 E37 |
FRT FRP FRP-PFI |
| Mustang 5.2L Supercharged | 306 PIN | E31 B70 |
FRT FRP |
| Mustang TiVCT 5.2L | 198 PIN | B44 E115 |
FRT FRP |
| Nautilus 2.7L | 306 PIN | E37 B25 |
FRP FLP |
| Transit GTDI 3.5L | 306 PIN | E71 | FRP |
| All other vehicles | 198 PIN | E55 B73 |
FRP FLP |