DTC P0190: Fuel Rail Pressure Sensor Circuit; DTC P0192: Fuel Rail Pressure Sensor Circuit Low Input; DTC P0193: Fuel Rail Pressure Sensor Circuit High Input: Procedure

1. Connect the Techstream to the DLC3.
2. Start the engine.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / Fuel Press.
5. Read the values.

   Pressure

   3500 to 4500 kPa (35.7 to 45.9 kgf/cm² , 508 to 653 psi)

   Result

   Fuel Pressure (kPa)	Proceed to
   19600 or more	A
   0.0	B
   OK [4000 to 13000 kPa (40.8 to 132.6 kgf/cm2 , 580 to 1885 psi)] *	C

   HINT: 

   *: The value must change when the engine is run or stopped.

C → See step   5 

B → See step   3 

A: Go to next step 

1. Disconnect the fuel pressure sensor connector.
   Fig 1: Identifying Fuel Pressure Sensor Connector G19

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the engine switch on (IG).
3. Measure the voltage between the terminal of the fuel pressure sensor connector.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   G19-1 (VC) - G19-3 (E2)	Engine switch on (IG)	4.5 to 5.5 V

4. Reconnect the fuel pressure sensor connector.

NG → See step   4 

OK: Go to next step 

1. Inspect the fuel pressure sensor. Refer to INSPECTION .

NG → See step   6 

OK: Go to next step 

1. Disconnect the fuel pressure sensor connector.
2. Disconnect the ECM connectors.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   G19-1 (VC) - E3-18 (VC)	Always	Below 1 Ω
   G19-2 (PR) - E6-27 (PR)	Always	Below 1 Ω
   G19-3 (E2) - E3-28 (E2)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   G19-1 (VC) or E3-18 (VC) - Body ground	Always	10 kΩ or higher
   G19-2 (PR) or E6-27 (PR) - Body ground	Always	10 kΩ or higher

4. Reconnect the fuel pressure sensor connector and ECM connectors.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL PRESSURE SENSOR - ECM) 

OK → See step   7