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 [09/2014 - 10/2015]: 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 and ECT / Data List / Fuel Press.
5. Read the values.

   OK

   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	B
   (3500 to 4500)*	C

   HINT: 

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

Result: 

B 

See step  3

Result: 

C 

CHECK FOR INTERMITTENT PROBLEMS 

(Refer to CHECK FOR INTERMITTENT PROBLEMS [09/2014 - 10/2015] )

Result: 

A 

See step  2

1. Disconnect the 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	Switch Condition	Specified Condition
   F44-3 (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.

Result: 

NG 

See step  6

Result: 

OK 

See step  3

1. Inspect the fuel pressure sensor (Refer to INSPECTION [09/2014 - 10/2015] ).

Result: 

NG 

REPLACE FUEL DELIVERY PIPE SUB-ASSEMBLY (FUEL PRESSURE SENSOR) 

(Refer to REMOVAL [09/2014 - 10/2015] )

Result: 

OK 

See step  4

1. Start the engine.

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

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (ECM)

   HINT: 

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

Result: 

OK 

REPLACE ECM 

(Refer to REMOVAL [09/2014 - 10/2015] )

Result: 

NG 

See step  5

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
   F1-18 (VC) - F44-3 (VC)	Always	Below 1 Ω
   F4-27 (PR) - F44-2 (PR)	Always	Below 1 Ω
   F1-28 (E2) - F44-1 (E2)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   F1-18 (VC) or F44-3 (VC) - body ground	Always	10 kΩ or higher
   F4-27 (PR) or F44-2 (PR) - Body ground	Always	10 kΩ or higher

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

Result: 

OK 

REPLACE FUEL DELIVERY PIPE SUB-ASSEMBLY (FUEL PRESSURE SENSOR) 

(Refer to REMOVAL [09/2014 - 10/2015] )

Result: 

NG 

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

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 Short)

   Tester Connection	Condition	Specified Condition
   F1-18 (VC) or F44-3 (VC) - Body ground	Always	10 kΩ or higher

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

Result: 

OK 

REPLACE ECM 

(Refer to REMOVAL [09/2014 - 10/2015] )

Result: 

NG 

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