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 and turn the Techstream on.
3. Select the following menu items: Powertrain/Engine/Data List/Fuel Press.
4. Read the values.

   Standard pressure

   3 to 5 MPa (30.6 to 51 kgf/cm² , 435 to 725 psi)

   Result

   Fuel Pressure (MPa)	Proceed to
   19.6 or more	A
   0.0	B
   OK (3 to 5 MPa [30.6 to 51 kgf/cm2 , 435 to 725 psi]) *	C

   HINT: 

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

C → CHECK FOR INTERMITTENT PROBLEMS 

B → See step   3 

A: Go to next step 

1. Disconnect the E72 fuel pressure sensor connector.
   Fig 1: Identifying E72 Fuel Pressure Sensor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the engine switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Specified Condition
   E72-3 (VC) - E72-1 (E2)	4.5 to 5.5 V

NG → See step   4 

OK: Go to next step 

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

NG → REPLACE FUEL PRESSURE SENSOR 

OK: Go to next step 

1. Disconnect the E45 ECM connector.
2. Disconnect the E72 fuel pressure sensor connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open)

   Tester Connection	Specified Condition
   E45-31 (VCPR) - E72-3 (VC)	Below 1 Ω
   E45-29 (PR) - E72-2 (PR)	Below 1 Ω
   E45-30 (EPR) - E72-1 (E2)	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Specified Condition
   E45-31 (VCPR) or E72-3 (VC) - Body ground	10 kΩ or higher
   E45-29 (PR) or E72-2 (PR) - Body ground	10 kΩ or higher

4. Reconnect the fuel pressure sensor connector.
5. Reconnect the ECM connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE ECM