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 [04/2013 - 08/2015]: Procedure

1. Connect the Techstream to the DLC3.
2. Start the engine.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Gas General / Fuel Press.

   Powertrain > Engine > Data List 

   Tester Display
   Fuel Press

5. Read the values.

   OK

   3500 to 4500 kPag (Idling warmed up engine)

   Result

   Fuel Pressure (kPag)	Proceed to
   Approximately 19600 or higher	A
   Approximately 0
   (3500 to 4500)*	B

   HINT: 

   *: The value must change when the engine is moving or stationary.

Result: 

B 

CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [04/2013 - 08/2015] 

Result: 

A 

See step  2

1. Disconnect the fuel pressure sensor connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

2. Turn the engine switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F45-3 (VC) - Body ground	Engine switch on (IG)	4.5 to 5.5 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  6

Result: 

OK 

See step  3

1. Inspect the fuel pressure sensor.

   Refer to INSPECTION [04/2013 - 08/2015]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FUEL DELIVERY PIPE SUB-ASSEMBLY (FUEL PRESSURE SENSOR). Refer to  REMOVAL [04/2013 - 08/2015] 

Result: 

OK 

See step  4

1. Start the engine.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (ECM)

2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F4-27 (PR) - F1-28 (E2)	Idling with warm engine	1.0 to 1.7 V

   HINT: 

   The fuel pressure in the delivery pipe is 3.5 to 4.5 MPa.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [04/2013 - 08/2015] 

Result: 

NG 

See step  5

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F4-27 (PR) - F45-2 (PR)	Always	Below 1 Ω
   F1-28 (E2) - F45-1 (E2)	Always	Below 1 Ω
   F4-27 (PR) or F45-2 (PR) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE FUEL DELIVERY PIPE SUB-ASSEMBLY (FUEL PRESSURE SENSOR). Refer to  REMOVAL [04/2013 - 08/2015] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

   Tester Connection	Condition	Specified Condition
   F1-18 (VC) - F45-3 (VC)	Always	Below 1 Ω
   F1-18 (VC) or F45-3 (VC) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [04/2013 - 08/2015] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR