DD: Fuel Rail Pressure (FRP), Fuel Rail Temperature (FRT ...ww2.justanswer.com/uploads/fordguy4u/2010-12-17_160201_a...2010/12/17 · DD: Fuel Rail Pressure (FRP), Fuel Rail Temperature

DD1 DTC P0192: DETERMINE THE PRESENT FRP V PID VOLTAGE

Note: Repair P0230, P0231 or P0232 fuel pump DTC(s) prior to this test.

� Key ON, engine OFF.

� Access the PCM and monitor the FRP V PID.

Is the voltage less than 0.25 V?

DD2 CHECK THE FRP SENSOR FOR LEAKS

� Key ON, engine running.

� Idle the engine for 2 minutes.

� Key in OFF position.

� REMOVE the FRP Sensor vacuum hose.

� INSPECT the FRP Sensor and vacuum hose for traces of fuel.

Is fuel present?

DD3 INDUCE THE OPPOSITE FRP SENSOR VOLTAGE

� FRP Sensor connector disconnected.



Is the voltage greater than 4.5 V?

DD4 CHECK THE FRP CIRCUIT(S) FOR AN OPEN IN THE HARNESS

� PCM connector disconnected.

� Measure the resistance between:

Is the resistance less than 5 ohms?

DD5 CHECK THE VREF AND SIGRTN CIRCUITS FOR OPEN IN HARNESS

� PCM connector connected.


� Measure the voltage between:

2004 PCED Gasoline Engines SECTION 5: Pinpoint Tests

Procedure revision date: 03/24/2005

DD: Fuel Rail Pressure (FRP), Fuel Rail Temperature (FRT) and Fuel Rail Pressure Temperature (FRPT) Sensors

DD: Introduction

Yes No

Key in OFF position. For F-150 Heritage 5.4L Dedicated NGV, and Crown Victoria Dedicated NGV, GO to DD3 . For E-Series Dedicated NGV, and F-150 Heritage Bi-Fuel, GO to DD30 . For all others, GO to DD2 .

Key in OFF position. GO to DD28 .

Yes No

Key in OFF position. INSTALL a new FRP sensor. REFER to the fuel system WARNING information. Clear the PCM DTCs. REPEAT the self-test.

GO to DD3 .

Yes No


GO to DD4 .

( + ) PCM Connector, Harness Side ( - ) FRP Sensor Connector, Harness Side

FRP FRP

Yes No

GO to DD5 . REPAIR the open circuit.

21Gasoline Engines PCED

12/17/2010http://www.fordtechservice.dealerconnection.com/pubs/content/~WV42/~MUS~LEN/14/...

Is the voltage between 4 V - 5.5 V?

DD6 VERIFY DIAGNOSTIC TOOL COMMUNICATION


� Connect a 5 amp fused jumper wire between the following:

� Access the PCM and monitor the FRP PID.

Does a diagnostic tool communication concern exist?

DD7 CHECK THE FRP V CIRCUIT FOR A SHORT TO VREF

� Remove the jumper wire(s).



Is the resistance greater than 10K ohms?

DD8 CHECK THE FRP CIRCUIT(S) FOR A SHORT TO SIGRTN OR GND IN THE HARNESS

� Diagnostic tool connector disconnected.









Is the voltage greater than 4 V?

( + ) FRP Sensor Connector, Harness Side ( - ) FRP Sensor Connector, Harness Side

VREF SIGRTN

Yes No


GO to C1 .

Point A FRP Sensor Connector, Harness Side Point B FRP Sensor Connector, Harness Side

FRP SIGRTN

Yes No



( + ) PCM Connector, Harness Side ( - ) PCM Connector, Harness Side

VREF FRP

Yes No

INSTALL a new PCM. (refer to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM)).

REPAIR the short circuit.


FRP SIGRTN

( + ) PCM Connector, Harness Side ( - ) Vehicle Battery

FRP Negative terminal

Yes No



Yes No

GO to DD10 . GO to DD28 .



DD10 CHECK THE FRP SENSOR FOR LEAKS




� REMOVE the FRP Sensor vacuum hose.

� INSPECT the FRP Sensor and vacuum hose for traces of fuel.

Is fuel present?

DD11 CHECK THE FUEL PRESSURE



Is the pressure greater than 827 kPa (119.9 psi) for Dedicated NGV or greater than 482.6 kPa (70 psi) for all others?

DD12 DTCS P0190 AND P0191: CHECK FOR FUEL PUMP DTCS

Are DTCs P0230, P0231, P0232, P1233, P1235, or P1237 present?

DD13 IS DTC P0191 PRESENT IN THE KOEO OR KOER SELF-TEST?

Is DTC P0191 present in the KOEO or KOER self-test?

DD14 CHECK THE VREF & SIGRTN CIRCUIT(S)








Yes No


GO to DD11 .

Yes No

For Dedicated NGV GO to DD23 . For all others: GO to DD14 .

Key in OFF position. For Dedicated NGV GO to HB1 . For all others: GO to Z1 .

Yes No

DISREGARD the current diagnostic trouble code (DTC) at this time. DIAGNOSE the next DTC. GO to Section 4, Diagnostic Trouble Code (DTC) Charts.

GO to DD13 .

Yes No



VREF SIGRTN

Yes No


GO to C1 .

( + ) PCM Connector, Harness Side ( - ) FRP Sensor Connector, Harness Side

FRP FRP

Yes No








DD17 CHECK THE FRP CIRCUIT FOR A SHORT TO VREF





DD18 CHECK THE FRP CIRCUIT FOR A SHORT TO POWER






Is the voltage less than 1 V?

DD19 INSPECT ALL THE VACUUM HOSES CONNECTED TO THE INTAKE MANIFOLD FOR LEAKS


� FRP Sensor connector connected.


� Allow the engine idle to stabilize.

� Inspect all the vacuum hoses connected to the intake manifold for leaks.

Are any vacuum hose concerns present?

DD20 CHECK THE FRP CONNECTOR FOR DAMAGE OR CORROSION



� Inspect the sensor, wiring, and connector for damage, corrosion, or water intrusion.

Is a concern present?



FRP SIGRTN

Yes No




VREF FRP

Yes No



( + ) FRP Sensor Connector, Harness Side ( - ) Vehicle Battery


Yes No

GO to DD19 . Key in OFF position. REPAIR the short circuit.

Yes No

ISOLATE the fault and REPAIR as necessary. GO to DD20 .

Yes No

REPAIR as necessary. GO to DD21 .



DD21 CHECK THE FRP PID

Note: The fuel pressure is likely to increase after the fuel pressure is relieved with the system closed. The rate and amount of the fuel pressure increase is dependent upon the ambient air and fuel temperatures.

Note: Prepare to record the FRP PID value within 5 seconds after the engine is shut off and also after the fuel pressure is relieved.







� Record the FRP PID value within 5 seconds of the key off.

� Relieve the fuel pressure. Refer to the Workshop Manual Section 310-00 Fuel System for the Fuel System Pressure Release or Fuel Line Evacuation procedure.

� Disable the fuel pump.


� Record the FRP PID value within 5 seconds of completing the fuel system pressure release procedure.

Is the difference between the recorded FRP PID values greater than 34 kPa (5 psi)?

DD22 COMPARE THE FRP PID TO THE MECHANICAL GAUGE

Note: Most mechanical gauges are referenced to atmospheric pressure. The FRP sensor is referenced to manifold pressure. In order to make a valid comparison, the engine must be off.

Note: The vehicle may exhibit a long crank until the fuel system is pressurized.


� Connect a mechanical fuel pressure gauge.


� Monitor the mechanical gauge.


� Compare the FRP PID value to the mechanical gauge.


� Pressurize the fuel system. Refer to the Workshop Manual Section 310-00 Fuel System for the Fuel System Pressure Release or Fuel Line Evacuation procedure to restore the fuel system pressure.


� Allow the fuel pressure to stabilize.




Are the FRP PID values within 34 kPa (5 psi) of the mechanical gauge readings?



� NG Module connector disconnected.




� NG Module connector connected.


Yes No

For Dedicated NGV and Bi-Fuel vehicles, GO to Pinpoint Test HB . For all others, GO to Pinpoint Test HC .

GO to DD22 .

Yes No

For E-Series Dedicated NGV, and F-150 Heritage Bi-Fuel, INSTALL a new NG module. For all others, INSTALL a new PCM. REFER to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM).

For Dedicated NGV and Bi-Fuel vehicles, GO to Pinpoint Test HB . For all others, INSTALL a new FRP sensor. REFER to the fuel system WARNING information at the beginning of Pinpoint Test HC. GO to Pinpoint Test HC .

( + ) NG Module Connector, Harness Side ( - ) FRP Sensor Connector, Harness Side

FRP FRP

Yes No



FRP SRtn





DD25 CHECK THE FRP CIRCUIT FOR A SHORT TO SREF





DD26 CHECK THE FRP CIRCUIT FOR A SHORT TO POWER






DD27 CHECK THE FRP VOLTAGE PID DURING FUEL RAIL PRESSURE RELIEF



Note: Before servicing or replacing any components in the fuel system, reduce the possibility of injury or fire by following the warning, caution, and handling directions in pinpoint test HB.

� Relieve the fuel pressure.

� Crank the engine.


Is the voltage between 0.4 V - 0.6 V?

DD28 CHECK THE FRP VOLTAGE PID DURING FUEL RAIL PRESSURE RELIEF

� Disable the inertia switch.



� Monitor the FRP voltage while cranking the engine.

� FRP voltage decreases as the fuel rail pressure drops and stabilizes when the fuel rail pressure reaches atmospheric pressure.

Is the voltage value within specification?

Yes No




FRP SRef

Yes No

INSTALL a new NG module. REPAIR the short circuit.



Yes No


Key in OFF position. REPAIR the short circuit.

Yes No

INSTALL a new NG module. (refer to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM)).

GO to HB1 .

Vehicle Low Limit High Limit

F-150 1.0V 1.5V

All others 0.2V 0.7V

Yes No

Key in OFF position. INSTALL a new FRP sensor.



DD29 PERFORM A THOROUGH WIGGLE TEST ON THE FRP HARNESS

� Reset the inertia switch.



� Perform a thorough wiggle test on the FRP Sensor harness.

Is the FRP signal stable?

DD30 CHECK THE SREF AND SRTN CIRCUITS FOR OPEN IN THE HARNESS









DD32 CHECK THE FRP CIRCUIT(S) FOR A SHORT TO SRTN OR GND IN THE HARNESS







DD33 INDUCE THE OPPOSITE FRP SENSOR VOLTAGE


� Diagnostic tool connector connected.


GO to DD29 . REFER to the fuel system WARNING information.

Yes No

GO to Z1 . Key in OFF position. Repair as necessary.


SRef SRtn

Yes No


GO to C25 .

( + ) NG Module Connector, Harness Side ( - ) FRP Sensor Connector, Harness Side

FRP FRP

Yes No



FRP SRtn



Yes No

GO to DD33 . REPAIR the short circuit.


FRP SRef





� (If the PID cannot be accessed, follow the NO action to take).


DD34 DTCS P0181, P0182 OR P0183: ARE DTCS P0181, P0182 OR P0183 PRESENT IN THE KOEO OR KOER SELF-TEST?

Are DTCs P0181, P0182 or P0183 present in the KOEO or KOER self-test?

DD35 DETERMINE THE PRESENT FRT PID VOLTAGE

� Allow vehicle temperatures to stabilize prior to temperature sensor tests.


� Normal test range 100 Deg C (212 Deg F) to 0 Deg C (32 Deg F).

� Access the PCM and monitor the FRT V PID.


DD36 FRT SENSOR RESISTANCE TEST

� FRT Sensor connector disconnected.

� Sensor resistance measurements can be compared to the table above when the sensor temperature is known.


Is the resistance between 2K ohms - 96K ohms?

DD37 CHECK THE FRT AND SIG RTN CIRCUIT(S) FOR AN OPEN IN THE HARNESS



Are the resistances greater than 5 ohms?

DD38 CHECK THE FRT CIRCUIT(S) FOR A SHORT TO SIGRTN OR GND IN THE HARNESS




Yes No


Key in OFF position. INSTALL a new NG module. Clear the PCM DTCs. REPEAT the self-test.

Yes No

For E-Series Dedicated NGV, and F-150 Heritage Bi-Fuel, GO to DD75 . For all others, GO to DD35 .

For E-Series Dedicated NGV, and F-150 Heritage Bi-Fuel, GO to DD86 . For all others, GO to DD88 .

Yes No


( + ) FRT Sensor Connector, Component Side ( - ) FRT Sensor Connector, Component Side

FRT SIGRTN

Yes No

GO to DD37 .

Key in OFF position. INSTALL a new FRT sensor. REFER to the fuel system WARNING information. Clear the PCM DTCs. REPEAT the self-test.

( + ) PCM Connector, Harness Side ( - ) FRT Sensor Connector, Harness Side

FRT FRT

SIGRTN SIGRTN

Yes No

REPAIR the open circuit. GO to DD38 .


FRT SIGRTN










DD40 CHECK THE SENSOR SIGNAL CIRCUIT FOR A SHORT TO SIGRTN





DD41 CHECK THE SENSOR SIGNAL FOR A SHORT TO VREF




DD42 DTC P0180: PERFORM A THOROUGH WIGGLE TEST ON THE FRT SENSOR HARNESS



� Perform a thorough wiggle test on the FRT Sensor harness.

Is the FRT signal stable?

DD43 KOEO AND KOER DTC P0181: CHECK THE FRT_V PID



FRT Negative terminal

Yes No


Point A FRT Sensor Connector, Harness Side Point B FRT Sensor Connector, Harness Side

FRT SIGRTN

Yes No


Key in OFF position. REMOVE the jumper(s). GO to DD40 .

( + ) FRT Sensor Connector, Harness Side ( - ) FRT Sensor Connector, Harness Side

FRT SIGRTN

Yes No

GO to DD41 . REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.


FRT VREF

Yes No


REPAIR the short circuit to VREF.

Yes No

GO to DD44 . Key in OFF position. Repair as necessary.




� Normal test range 100 Deg C (212 Deg F) to 0 Deg C (32 Deg F).


Is the voltage value within specification?

DD44 COMPARE THE PIDS AFTER STABILIZING THE VEHICLE TEMPERATURE

� Access the PCM and monitor the FRT_TEMP, CHT and ECT PIDs.

Are the temperature PIDs nearly equal in value?






DD46 CHECK THE FRPT SENSOR FOR LEAKS




� REMOVE the FRPT vacuum hose.

� INSPECT the FRPT and vacuum hose for traces of fuel.

Is fuel present?


� FRPT Sensor connector disconnected.




DD48 INDUCE THE OPPOSITE FRPT SENSOR VOLTAGE

Vehicle Low Limit High Limit

Vehicles with a 60-pin NG module 0.4V 5.0V

All others 0.4V 4.5V

Yes No

GO to DD34 . The concern is elsewhere. RETURN to Section 3 , Symptom Charts for further direction.

Yes No

The fault is not present at this time CLEAR the DTCs. REPEAT the self-test.

GO to Z1 .

Yes No

For F-150 Heritage 5.4L Dedicated NGV, and Crown Victoria Dedicated NGV, GO to DD47 . For all others, GO to DD46 .

GO to DD58 .

Yes No

Key in OFF position. INSTALL a new FRPT sensor. REFER to the fuel system WARNING information. Clear the PCM DTCs. REPEAT the self-test.

GO to DD47 .

( + ) FRPT Sensor Connector, Harness Side ( - ) FRPT Sensor Connector, Harness Side

VREF - Pin 2 SIGRTN - Pin 4

Yes No


GO to C1 .







DD49 CHECK THE FRPT CIRCUIT(S) FOR A SHORT TO SIGRTN OR GND IN THE HARNESS












Is the voltage greater than 4 V?

DD51 CHECK THE FRPT SENSOR FOR LEAKS




� REMOVE the FRPT Sensor vacuum hose.

� INSPECT the FRPT Sensor and vacuum hose for traces of fuel.

Is fuel present?






Yes No


GO to DD49 .


FRP SIGRTN



Yes No



Yes No

For F-150 Heritage 5.4L Dedicated NGV, and Crown Victoria Dedicated NGV, GO to DD52 . For all others, GO to DD51 .

GO to DD58 .

Yes No


GO to DD52 .





DD53 CHECK THE FRP V CIRCUIT FOR A SHORT TO POWER







DD55 CHECK THE FRP V CIRCUIT FOR A SHORT TO VREF




DD56 INDUCE THE OPPOSITE FRP V SENSOR VOLTAGE







DD57 CHECK THE FRP AND SIG RTN CIRCUIT(S) FOR AN OPEN IN THE HARNESS




Yes No


GO to C1 .

( + ) FRPT Sensor Connector, Harness Side ( - ) Vehicle Battery

FRP - Pin 1 Negative terminal

Yes No

Key in OFF position. REPAIR the short circuit. GO to DD54 .

Point A FRPT Sensor Connector, Harness Side Point B FRPT Sensor Connector, Harness Side

FRP - Pin 1 SIGRTN - Pin 4

Yes No


Key in OFF position. REMOVE the jumper(s). GO to DD56 .


VREF FRP

Yes No



FRP - Pin 1 SIGRTN - Pin 4

Yes No

Key in OFF position. INSTALL a new PCM. (refer to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM)).


( + ) PCM Connector, Harness Side ( - ) FRPT Sensor Connector, Harness Side




DD58 PERFORM A THOROUGH WIGGLE TEST ON THE FRPT HARNESS




� Perform a thorough wiggle test on the FRPT Sensor harness.

Is the FRP signal stable?

DD59 DTCS P0190 AND P0191: CHECK FOR FUEL PUMP DRIVER MODULE (FPDM) DTCS

� Check for self-test DTCs.

Are DTCs P1233, P1235 or P1237 present?

DD60 CHECK THE FRPT CONNECTOR FOR DAMAGE OR CORROSION





DD61 CHECK THE VREF AND SIGRTN CIRCUITS FOR AN OPEN IN THE HARNESS






� FRPT Sensor connector connected.






FRP FRP - Pin 1

SIGRTN SIGRTN - Pin 4

Yes No

REPAIR the open circuit.

INSTALL a new FRPT sensor. REFER to the fuel system WARNING information. Clear the PCM DTCs. REPEAT the self-test.

Yes No


Yes No

DISREGARD the current diagnostic trouble code (DTC) at this time. DIAGNOSE the next DTC. GO to Section 4, Diagnostic Trouble Code (DTC) Charts.

GO to DD60 .

Yes No




Yes No

GO to DD62 . GO to C1 .

Yes No











� Relieve the fuel pressure. Refer to the Workshop Manual Section 310-00 Fuel System for the Fuel System Pressure Release procedure.






Note: Most mechanical gauges are referenced to atmospheric pressure. The FRPT sensor is referenced to manifold pressure. In order to make a valid comparison, the engine must be off.









� Pressurize the fuel system. Refer to the Workshop Manual Section 310-00 Fuel System for the Fuel System Pressure Release procedure to restore the fuel system pressure.







DD65 DTCS P0182 OR P0183: DETERMINE THE PRESENT FRT PID VOLTAGE





DD66 FRT SENSOR RESISTANCE TEST


� Sensor resistance measurements can be compared to the table above when the sensor temperature is known.


Is the resistance between 2K ohms - 96K ohms?

Yes No

GO to Pinpoint Test HC . GO to DD64 .

Yes No

INSTALL a new PCM. REFER to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM).

INSTALL a new FRPT sensor. REFER to the fuel system WARNING information at the beginning of Pinpoint Test HC. GO to Pinpoint Test HC .

Yes No


( + ) FRPT Sensor Connector, Component Side ( - ) FRPT Sensor Connector, Component Side

FRT - Pin 3 SIGRTN - Pin 4

Yes No

GO to DD67 .




DD67 CHECK THE FRT AND SIG RTN CIRCUIT(S) FOR AN OPEN IN THE HARNESS




DD68 CHECK THE FRT CIRCUIT(S) FOR A SHORT TO SIGRTN OR GND IN THE HARNESS






DD69 CHECK FOR OPEN IN THE HARNESS





DD70 CHECK THE SIGNAL AND SIGRTN CIRCUITS FOR AN OPEN IN THE HARNESS



Are the resistances less than 5 ohms?

DD71 CHECK THE SENSOR SIGNAL FOR A SHORT TO VREF




( + ) PCM Connector, Harness Side ( - ) FRPT Sensor Connector, Harness Side

FRT FRT - Pin 3

SIGRTN SIGRTN - Pin 4

Yes No

REPAIR the open circuit. GO to DD68 .


FRT SIGRTN


FRT Negative terminal

Yes No



FRT - Pin 3 SIGRTN - Pin 4

Yes No

INSTALL a new FRPT sensor. REFER to the fuel system WARNING information. Clear the PCM DTCs. REPEAT the self-test.

Key in OFF position. Remove the jumper wire(s). GO to DD70 .

( + ) FRPT Sensor Connector, Harness Side ( - ) PCM Connector, Harness Side

FRT - Pin 3 FRT

SIGRTN - Pin 4 SIGRTN

Yes No



FRT VREF



DD72 DTC P0180: PERFORM A THOROUGH WIGGLE TEST ON THE FRPT SENSOR HARNESS


� Perform a thorough wiggle test on the FRPT Sensor harness.

Is the FRT signal stable?

DD73 KOEO AND KOER DTC P0181: CHECK THE FRT_V PID





DD74 COMPARE THE PIDS AFTER STABILIZING THE VEHICLE TEMPERATURE

� Access the PCM and monitor the FRT_TEMP, CHT and ECT PIDs.

Are the temperature PIDs nearly equal in value?

DD75 ARE DTCS P0182 OR P0183 PRESENT IN THE KOEO OR KOER SELF-TEST?

Are DTCs P0182 or P0183 present in the KOEO or KOER self-test?

DD76 KOEO AND KOER DTC P0181: CHECK THE COOLING SYSTEM

� Verify the cooling system is operating normally.

WARNING: TO AVOID PERSONAL INJURY DO NOT UNSCREW THE COOLANT PRESSURE RELIEF CAP WHILE THE ENGINE IS OPERATING OR HOT. THE COOLING SYSTEM IS UNDER PRESSURE. STEAM AND HOT LIQUID CAN COME OUT FORCEFULLY WHEN THE CAP IS LOOSENED SLIGHTLY.

� Check the vehicle coolant level.

Is the cooling system OK?

DD77 CHECK THE RESISTANCE OF THE FRP SENSOR WITH THE ENGINE OFF




Note: REFER to the chart at the beginning of this test for resistance specifications.

Yes No


REPAIR the short circuit to VREF.

Yes No


Yes No

GO to DD74 . The concern is elsewhere. RETURN to Section 3 , Symptom Charts for further direction.

Yes No

The fault is not present at this time CLEAR the DTCs. REPEAT the self-test.

GO to Z1 .

Yes No


Yes No

GO to DD77 .

REFER to Workshop Manual, Section 303, Engine Cooling for cooling system diagnostics. Repair as necessary.


FRT SRtn



Is the resistance within specification?

DD78 CHECK THE RESISTANCE OF THE CHT SENSOR WITH THE ENGINE RUNNING

CAUTION: While conducting checks with a running engine ensure adequate safety precautions are observed to prevent contact with moving engine parts. For example; ensure ties or loose clothing do not come into contact with the cooling fan or drive belts.

� Vehicle must be at normal operating temperature.




DD79 KOEO AND KOER DTCS P0182 OR P0183: CHECK THE TEMPERATURE SENSOR SIGNAL


� Access the NG and monitor the FRTMPAB PID.

Is the temperature greater than 125°C (257°F)?

DD80 CHECK FOR A GROUNDED CIRCUIT




Is the temperature less than -20°C (-4°F)?

DD81 CHECK THE SENSOR SIGNAL FOR A SHORT TO GROUND





DD82 CHECK THE RESISTANCE OF THE FRT SENSOR WITH THE ENGINE OFF

Yes No

GO to DD78 . INSTALL a new FRT sensor.


FRT SRtn

Yes No

Key in OFF position. Check the FRT & NG connector for damage or corrosion. Check the FRT % SRtn circuit(s) between the sensor and the NG module. Service as necessary

Key in OFF position. INSTALL a new FRT sensor.

Yes No



Yes No

INSTALL a new FRT sensor. Key in OFF position. GO to DD81 .

( + ) FRT Sensor Connector, Harness Side ( - ) FRT Sensor Connector, Harness Side

FRT SRtn

( + ) FRT Sensor Connector, Harness Side ( - )

FRT Ground

Yes No

INSTALL a new NG module. (refer to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM)).








DD83 CHECK THE FRT CIRCUIT FOR A SHORT TO POWER





DD84 CHECK THE FRT & SRTN CIRCUIT(S) FOR AN OPEN


Are the resistances less than 5 ohms?

DD85 CHECK THE SENSOR SIGNAL FOR A SHORT TO SREF



DD86 CONTINUOUS MEMORY DTCS P0182 OR P0183: INTERMITTENT CHECK



� While observing the PID, carry out the following:

� Tap on the sensor to simulate road shock.

� Wiggle the sensor connector.

� Shake, wiggle, and bend the FRT & SRtn circuit(s). Check the FRT & SRtn circuit(s) between the sensor and the NG module.

Is there a large change in the temperature reading?

DD87 CHECK THE FRT & NG CONNECTOR FOR DAMAGE OR CORROSION



Are the connectors and terminals OK?


FRT SRtn

Yes No

GO to DD83 . INSTALL a new FRT sensor.

( + ) FRT Sensor Connector, Harness Side ( - )

FRT Ground

Yes No


Key in OFF position. REPAIR the short circuit to PWR.

( + ) FRT Sensor Connector, Harness Side ( - ) NG Module Connector, Harness Side

FRT FRT

SRtn SRtn

Yes No


( + ) NG Module Connector, Harness Side ( - ) NG Module Connector, Harness Side

FRT SRef

Yes No

INSTALL a new NG module. REPAIR the short circuit.

Yes No




DD88 CONTINUOUS MEMORY DTCS P0182 OR P0183: INTERMITTENT CHECK


Note: The PID referred to below may read as EFT on some diagnostic tools.





� Wiggle, shake, and bend small sections of the wiring harness while working from the FRT Sensor to the PCM.

Is there a large change in the voltage reading?

DD89 CHECK THE FRT & PCM CONNECTOR FOR DAMAGE OR CORROSION



Are the connectors and terminals OK?

DD90 CONTINUOUS MEMORY DTCS P0190 AND P0191: CHECK THE FRP CONNECTOR FOR DAMAGE OR CORROSION





DD91 CHECK THE SIGRTN, SREF, SRTN, AND VREF CIRCUITS FOR AN OPEN IN THE HARNESS


� For E-Series Dedicated NGV, and F-150 Heritage Bi-Fuel.


� For all others.








Yes No

The fault is not present at this time DISREGARD the current diagnostic trouble code (DTC) at this time. DIAGNOSE the next DTC. GO to Section 4, Diagnostic Trouble Code (DTC) Charts.

Repair as necessary.

Yes No


Yes No

The fault is not present at this time DISREGARD the current diagnostic trouble code (DTC) at this time. DIAGNOSE the next DTC. GO to Section 4, Diagnostic Trouble Code (DTC) Charts.

Repair as necessary.

Yes No



SRef SRtn


VREF SIGRTN

Yes No

GO to DD92 .

For E-Series Dedicated NGV, and F-150 Heritage Bi-Fuel, GO to C25 . For all others, GO to C1 .













� Relieve the fuel pressure. Refer to the Workshop Manual Section 310-00 Fuel System for the Fuel System Pressure Release or Fuel Line Evacuation procedure.






Note: Most mechanical gauges are referenced to atmospheric pressure. The FRP sensor is referenced to manifold pressure. In order to make a valid comparison, the engine must be off.









� Pressurize the fuel system. Refer to the Workshop Manual Section 310-00 Fuel System for the Fuel System Pressure Release or Fuel Line Evacuation procedure to restore the fuel system pressure.







DD95 CHECK THE FUEL SYSTEM AND FRP SENSOR CIRCUITS


� Check the fuel delivery system for concerns.






� Wiggle, shake, and bend small sections of the wiring harness while working from the FRP Sensor to the PCM.

� Check the FRP connector for damage or corrosion.


Yes No


Yes No

For Dedicated NGV and Bi-Fuel vehicles, GO to Pinpoint Test HB . For all others, GO to Pinpoint Test HC .

GO to DD94 .

Yes No

GO to DD95 .

For Dedicated NGV and Bi-Fuel vehicles, GO to Pinpoint Test HB . For all others, INSTALL a new FRP sensor. REFER to the fuel system WARNING information at the beginning of Pinpoint Test HC. GO to Pinpoint Test HC .

Yes No

ISOLATE the fault and REPAIR as necessary. GO to Z1 .





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DD: Fuel Rail Pressure (FRP), Fuel Rail Temperature (FRT ...ww2.justanswer.com/uploads/fordguy4u/2010-12-17_160201_a...2010/12/17 · DD: Fuel Rail Pressure (FRP), Fuel Rail Temperature