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. Put the engine in inspection mode. Refer to INSPECTION MODE PROCEDURE .
3. Turn the Techstream ON.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Fuel Press.
5. Read the values.

   Pressure

   4000 to 13000 kPa (40.8 to 132.6 kgf/cm² , 580 to 1885 psi).

   RESULT
   
   

   Fuel Pressure (kPa)	Proceed to
   19600 kPa or higher	A
   0.0	A
   OK [4000 to 13000 kPa]*	B

   HINT: 

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

B → See step   6 

A: Go to next step 

1. Disconnect the H17 fuel pressure sensor connector.
   Fig 1: Identifying H17 Fuel Pressure Sensor Connector And E1, E3 ECM Connectors Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the E1 and E3 ECM connectors.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open)

   Tester Connection	Condition	Specified Condition
   H17-1 (VC) - E1-18 (VC)	Always	Below 1 Ω
   H17-2 (PR) - E3-27 (PR)	Always	Below 1 Ω
   H17-3 (E2) - E1-28 (E2)	Always	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Condition	Specified Condition
   H17-1 (VC) or E1-18 (VC) - Body ground	Always	10 kΩ or higher
   H17-2 (PR) or E3-27 (PR) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the H17 fuel pressure sensor connector.
   Fig 2: Identifying H17 Fuel Pressure Sensor Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the power switch on (IG).
3. Measure the voltage between the terminals of the fuel pressure sensor connector.

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   H17-1 (VC) - H17-3 (E2)	Power switch on (IG)	4.5 to 5.5 V

NG → See step   7 

OK: Go to next step 

1. Replace the fuel pressure sensor. Refer to REMOVAL .

NEXT: Go to next step 

1. Put the engine in inspection mode. Refer to INSPECTION MODE PROCEDURE .
2. Connect the Techstream to the DLC3.
3. Turn the Techstream ON.
4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
5. Read the DTCs.
   RESULT
   
   

   Display (DTC Output)	Proceed to
   P0190, P0192 and/or P0193	A
   No output	B

B → END 

A → See step   7