P0193

B : Fuel Rail Pressure Sensor: P0190, P0192, P0193

B1 : CHECK THE FUEL RAIL PRESSURE SENSOR SUPPLY VOLTAGE
1. Turn the ignition switch to the OFF position.
2. Disconnect the fuel rail pressure sensor electrical connector, PI028.
3. Turn the ignition switch to the ON position.
4. Measure the supply voltage to the fuel rail pressure sensor electrical connector, PI028 pin 001, (OY) and GROUND.

Is the supply voltage between 4.5 and 5.5 volts?

Yes
Go to B2

No
REPAIR the circuit between PI028, pin 001, (OY) and PCM electrical connector, PI001, pin 012. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

The fault could be in any of the components or sensors in the 5 volt supply circuit, or the PCM If the DTC is repeated, INSTALL a new PCM.

B2 : CHECK THE FUEL RAIL PRESSURE SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT
1. Turn the ignition switch to the OFF position.
2. Measure the resistance between the fuel rail pressure sensor electrical connector PI028, pin 002, (BG) and GROUND.

Is the resistance greater than 10,000 ohms?

Yes
REPAIR the circuit between PI028, pin 002, (BG) and PCM electrical connector, PI001, pin 019. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

The fault could be in any of the components or sensors in the 5 volt supply circuit, or the PCM. If the DTC is repeated, INSTALL a new PCM.

No
Goto B3

B3 : CHECK THE FUEL RAIL PRESSURE SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT
1. Disconnect the PCM electrical connector, PI001.
2. Measure the resistance between the fuel rail pressure sensor electrical connector PI028, pin 003, (U) and PI001, pin 073.

Is the resistance greater than 5 ohms?

Yes
REPAIR the circuit between PI028, pin 003, (U) and PI001, pin, 073 (U). For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

No
Goto B4

B4 : CHECK THE FUEL RAIL PRESSURE SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND
1. Measure the resistance between the fuel rail pressure sensor electrical connector PI028, pin 003 (U) and GROUND.

Is the resistance less than 10,000 ohms?

Yes
REPAIR the circuit between PI028, pin 003 (U) and PI001 pin 073, (U). For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

No
Goto B5

B5 : CHECK THE FUEL RAIL PRESSURE SENSOR CIRCUIT RESISTANCE
1. Disconnect the fuel rail pressure sensor electrical connector PI028.
2. Measure the resistance between the fuel rail pressure sensor pins 001 and 002.

Is the resistance between 10,000 and 12,000 ohms?

Yes
Goto B6

No
Install a new fuel rail pressure sensor. CLEAR the DTC. TEST the system for normal operation.

B6 : CHECK THE FUEL RAIL PRESSURE SENSOR CIRCUIT RESISTANCE
1. Measure the resistance between the fuel rail pressure sensor pins 002 and 003.

Is the resistance between 22,000 and 33,000 ohms?

Yes
Goto B7

No
Install a new fuel rail pressure sensor. CLEAR the DTC. TEST the system for normal operation.

B7 : CHECK THE FUEL RAIL PRESSURE SENSOR CIRCUIT RESISTANCE
1. Measure the resistance between the fuel rail pressure sensor pins 001 and 003.

Is the resistance between 22,000 and 33,000 ohms?

Yes
Install a new powertrain control module (PCM).

No
Install a new fuel rail pressure sensor. CLEAR the DTC. TEST the system for normal operation.