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

   Standard

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

   HINT: 

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

B → See step   3 

C → CHECK FOR INTERMITTENT PROBLEMS 

A: Go to next step 

1. Disconnect the E37 fuel pressure sensor connector.
   Fig 1: Identifying E37 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
   VC (E37-3) - E2 (E37-1)	4.5 to 5.5 V

NG → See step   4 

OK: Go to next step 

1. Start the engine.
   Fig 2: Identifying E6 ECM Connector

   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
   PR (E6-29) - EPR (E6-30)	25°C (77°F)	1.8 to 2.3 V

   HINT: 

   The fuel pressure in the delivery pipe is 4000 to 13000 kPa (40.8 to 132.6 kgf/cm² , 580 to 1885 psi).

NG → See step   5 

OK → See step   6 

1. Disconnect the E6 ECM connector.
2. Disconnect the E37 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
   VCPR (E6-31) - VC (E37-3)	Below 1 Ω
   PR (E6-29) - PR (E37-2)	Below 1 Ω
   EPR (E6-30) - E2 (E37-1)	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Specified Condition
   VCPR (E6-31) or VC (E37-3) - Body ground	10 kΩ or higher
   PR (E6-29) or PR (E37-2) - Body ground	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   7 

1. Disconnect the E37 fuel pressure sensor connector.
2. Disconnect the E6 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for short)

   Tester Connection	Specified Condition
   PR (E6-29) or PR (E37-2) - Body ground	10 kΩ or higher

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE FUEL PRESSURE SENSOR