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.

   OK

   4 to 13 MPa (40.8 to 132.6 kgf/cm² , 580 to 1886 psi)

   Result

   Fuel Pressure	Proceed to
   19.6 MPa (199.9 kgf/cm2 , 2843 psi) or more	A
   Approximately 0.0	B
   OK (4 to 13 MPa (40.8 to 132.6 kgf/cm2 , 580 to 1886 psi)) *	C

   HINT: 

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

B → See step   3 

C → See step   6 

A: Go to next step 

1. Disconnect the fuel pressure sensor connector.
   Fig 1: Fuel Pressure Sensor E37 Harness 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	Switch Condition	Specified Condition
   E37-3 (VC) - Body ground	Engine switch on (IG)	4.5 to 5.5 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Fuel Pressure Sensor)

4. Reconnect the fuel pressure sensor connector.

NG → See step   5 

OK: Go to next step 

1. Start the engine.
   Fig 2: Identifying ECM E3 And E6 Harness Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   E6-25 (PR) - E3-28 (E2)	Idling with warm engine	1.2 to 3.3 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (ECM)

   HINT: 

   The fuel pressure in the delivery pipe is 4 to 13 MPa (40.8 to 132.6 kgf/cm² , 580 to 1886 psi).

NG → See step   4 

OK → See step   7 

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

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   E6-25 (PR) - E37-2 (PR)	Always	Below 1 Ω
   E3-28 (E2) - E37-1 (E2)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   E6-25 (PR) or E37-2 (PR) - Body ground	Always	10 kΩ or higher

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   8 

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

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   E3-29 (VC) - E37-3 (VC)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   E3-29 (VC) or E37-3 (VC) - Body ground	Always	10 kΩ or higher

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   9