P0193

2GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0190,P0192,P0193: Fuel Rail Pressure Sensor Circuit
P0193 - Fuel Rail Pressure Sensor Circuit High Input

DESCRIPTION

The fuel pressure sensor is installed on the delivery pipe. The sensor changes fuel pressure to an electrical signal and sends the signal to the ECM. Then the ECM controls the feedback of the pump discharge to maintain the fuel's target pressure between 4 and 13 MPa (40.8 to 132.6 kgf/cm2, 580 to 1885 psi). If the sensor output stops, the ECM will stop the fuel pump for high pressure and supply fuel using the low pressure side fuel pump.





The fuel pressure sensor is installed on a fuel delivery pipe and detects the fuel pressure. It controls feedback of the pump discharge in order to keep the fuel within the target pressure range between 4 and 13 MPa (40.8 and 132.6 kgf/cm2, 580 and 1885 psi) by the ECM.





HINT
After confirming DTC P0190, use the Techstream to confirm the fuel pressure in the delivery pipe by entering the following menus: Powertrain / Engine and ECT / Data List / Fuel Press.





MONITOR DESCRIPTION

These DTCs are set if the fuel pressure sensor output voltage is out of the standard range. The DTCs stand for an open or short malfunction of the sensor circuit.

If these DTCs are set, the ECM enters fail-safe mode and limits the engine power. Fail-safe mode continues until the power switch is turned off.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS

P0190:





P0192:





P0193:





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Freeze Frame Data.

PROCEDURE

1. READ OUTPUT DTC

(a) Put the engine in inspection mode Inspection Mode Procedure.

(b) Connect the Techstream to the DLC3.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(e) Read the DTC.

Result:





B -- INSPECT FUEL PRESSURE SENSOR
A -- Continue to next step.

2. INSPECT ECM (VC VOLTAGE)

(a) Disconnect the E72 fuel pressure sensor connector.





(b) Turn the power switch on (IG).

(c) Measure the voltage between the terminal of the fuel pressure sensor connector.

Standard voltage:





(d) Reconnect the fuel pressure sensor connector.

NG -- CHECK HARNESS AND CONNECTOR (FUEL PRESSURE SENSOR - ECM)
OK -- Continue to next step.

3. INSPECT FUEL PRESSURE SENSOR

(a) Inspect fuel pressure sensor Testing and Inspection.

NG -- REPLACE FUEL PRESSURE SENSOR
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (FUEL PRESSURE SENSOR - ECM)

(a) Disconnect the E83 ECM connector.

(b) Disconnect the E72 fuel pressure sensor connector.

(c) Measure the resistance.

Standard resistance (Check for open):





Standard resistance (Check for short):





(d) Reconnect the ECM connector.

(e) Reconnect the fuel pressure sensor connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ECM Removal