Does the Vehicle start an run ? What engine does it have ? 4.0 or 4.6 L You vehicle has electronic returnless fuel system , Fuel rail pressure sensor , FPDM - fuel pump driver module . The fuel pump driver module controls the fuel by pulse width modulation
Pulsewidthmodulation (PWM) is a powerful technique for controlling analog circuits with a processor's digital outputs. PWM is employed in a wide variety of applications, ranging from measurement and communications to power control and conversion. The PCM - engine computer uses the fuel rail pressure sensor input to send commands to the FPDM .
What code ? P0--- what ?
P0190 - Fuel Rail Pressure (FRP) Sensor Circuit Malfunction
Description:
The comprehensive component monitor (CCM) monitors the FRP sensor to the powertrain control module (PCM) for VREF voltage. The test fails when the VREF voltage from the PCM drops to a voltage less than a minimum calibrated value.
Possible Causes:
- VREF open in harness.
- VREF open in sensor.
- Vacuum leaks.
Diagnostic Aids:
Verify a VREF voltage between 4 and 6 volts.
Application
Key On Engine Off
Key On Engine Running
Continuous Memory
Fuel rail pressure temperature (FRPT) sensor
-
GO to DD26
GO to DD26
Fuel rail pressure (FRP) sensor only
-
-
GO to DD1
Fuel rail pressure (FRP) and fuel rail temperature (FRT) sensors
-
-
GO to DD1
P0191 - Fuel Rail Pressure (FRP) Sensor Circuit Performance
Description:
The comprehensive component monitor (CCM) checks the FRP for acceptable fuel pressure. The test fails when the fuel pressure falls below or exceeds a minimum/maximum calibrated value for a calibrated period of time.
Possible Causes:
- High fuel pressure.
- Low fuel pressure.
- Damaged FRP sensor.
- Excessive resistance in the circuit.
- Vacuum leaks.
- Low or no fuel.
Diagnostic Aids:
A FRP PID value during key on engine running (KOER) of 138 kPa (20 psi) to 413 kPa (60 psi) is acceptable.
Application
Key On Engine Off
Key On Engine Running
Continuous Memory
Fuel rail pressure temperature (FRPT) sensor
GO to DD34
Fuel rail pressure (FRP) sensor only
GO to DD9
Fuel rail pressure (FRP) and fuel rail temperature (FRT) sensors
GO to DD9
P0192 - Fuel Rail Pressure (FRP) Sensor Circuit Low Input
Description:
The comprehensive component monitor (CCM) monitors the FRP sensor circuit to the powertrain control module (PCM) for low voltage. If voltage falls below a calibrated limit for a calibrated amount of time during testing, the test fails.
Possible Causes:
- FRP signal shorted to SIG RTN or PWR GND.
- Damaged FRP sensor.
Diagnostic Aids:
A FRP PID value during the key on engine off (KOEO) or key on engine running (KOER) less than 0.3 volt indicates a hard fault.
Application
Key On Engine Off
Key On Engine Running
Continuous Memory
Fuel rail pressure temperature (FRPT) sensor
GO to DD26
GO to DD26
GO to DD39
Fuel rail pressure (FRP) sensor only
GO to DD1
GO to DD1
GO to DD14
Fuel rail pressure (FRP) and fuel rail temperature (FRT) sensors
GO to DD1
GO to DD1
GO to DD14
P0193 - Fuel Rail Pressure (FRP) Sensor Circuit High Input
Description:
The comprehensive component monitor (CCM) monitors the FRP sensor circuit to the powertrain control module (PCM) for high voltage. If voltage exceeds a calibrated limit for a calibrated amount of time during testing, the test fails.
Possible Causes:
- FRP signal shorted to VREF or VPWR.
- FRP signal open.
- Damaged FRP sensor.
Diagnostic Aids:
An FRP signal high condition can be caused by any number of conditions, including a short on FRP signal to VREF, a more positive voltage level, an open FRP signal or signal return. The FRP signal line is pulled up by the PCM and VREF at the sensor, and down by the sensor through SIGRTN.
Application
Key On Engine Off
Key On Engine Running
Continuous Memory
Fuel rail pressure temperature (FRPT) sensor
GO to DD26
GO to DD26
GO to DD39
Fuel rail pressure (FRP) sensor only
GO to DD1
GO to DD1
GO to DD14
Fuel rail pressure (FRP) and fuel rail temperature (FRT) sensors
P1233 Ford Fuel Pump Driver Module Diagnostics and Repair
FPDM Live
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