P0190

DTC P0190: FUEL RAIL PRESSURE SENSOR

G92396t7: 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 IJ007.
3. Turn the ignition switch to the ON position.
4. Measure the supply voltage to the fuel rail pressure sensor electrical connector IJ007 pin 1 (YG) and GROUND.

- Is the supply voltage between 4.5 and 5.5 volts?

-> Yes
GO to Pinpoint Test G92396t8.

-> No
REPAIR the circuit between IJ007 pin 1, (YG) and ENS07. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, INSTALL a new ECM. Before replacing a ECM, contact Dealer technical support.The fault could be in any of the components or sensors in the 5 volt supply circuit, or the ECM.

G92396t8: 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 IJ007 pin 2, (WG) and GROUND.

- Is the resistance greater than 10,000 ohms?

-> Yes
REPAIR the circuit between IJ007 pin 2 (WG) and ground at IJS02. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

-> No
GO to Pinpoint Test G92396t9.

G92396t9: CHECK THE FUEL RAIL PRESSURE SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT
1. Disconnect the ECM electrical connector EN16.
2. Measure the resistance between the fuel rail pressure sensor electrical connector IJ007 pin 3 (WG) and EN16 pin 73.

- Is the resistance greater than 5 ohms?

-> Yes
REPAIR the circuit between IJ007 pin 3 (WG) and EN016 pin 73 (WG). For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

-> No
GO to Pinpoint Test G92396t10.

G92396t10: CHECK THE FUEL RAIL PRESSURE SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND
1. Measure the resistance between the fuel rail pressure sensor electrical connector IJ007 pin 3 (WG) and GROUND.

- Is the resistance less than 10,000 ohms?

-> Yes
REPAIR the circuit between IJ007 pin 3 (WG) and EN016 pin 73 (WG). For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

-> No
GO to Pinpoint Test G92396t11.

G92396t11: CHECK THE FUEL RAIL PRESSURE SENSOR CIRCUIT RESISTANCE
1. Disconnect the fuel rail pressure sensor electrical connector IJ007.
2. Measure the resistance between the fuel rail pressure sensor pins 1 and 2.

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

-> Yes
GO to Pinpoint Test G92396t12.

-> No
Install a new fuel rail pressure sensor. Fuel Pulse Damper - 2.5L/3.0L (18.30.98) CLEAR the DTC. TEST the system for normal operation.

G92396t12: CHECK THE FUEL RAIL PRESSURE SENSOR CIRCUIT RESISTANCE
1. Measure the resistance between the fuel rail pressure sensor pins 2 and 3.

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

-> Yes
GO to Pinpoint Test G92396t13.

-> No
Install a new fuel rail pressure sensor. Fuel Pulse Damper - 2.5L/3.0L (18.30.98) CLEAR the DTC. TEST the system for normal operation.

G92396t13: CHECK THE FUEL RAIL PRESSURE SENSOR CIRCUIT RESISTANCE
1. Measure the resistance between the fuel rail pressure sensor pins 1 and 3.

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

-> Yes
Install a new ECM. Before replacing a ECM, contact Dealer technical support.

-> No
Install a new fuel rail pressure sensor. Fuel Pulse Damper - 2.5L/3.0L (18.30.98) CLEAR the DTC. TEST the system for normal operation.