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. Put the engine in inspection mode. Refer toINSPECTION 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 DTC.

   Result

   Display (DTC output)	Proceed to
   P0190, P0192	A
   P0190, P0193	B

B → See step   3 

A: Go to next step 

1. Disconnect the E72 fuel pressure sensor connector.
   Fig 1: Identifying E72 Fuel Pressure Sensor Connector Terminals

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

   Standard voltage

   Tester Connection	Specified Condition
   VC (E72-3) - E2 (E72-1)	4.5 to 5.5 V

4. Reconnect the fuel pressure sensor connector.

NG → See step   4 

OK: Go to next step 

1. Inspect fuel pressure sensor. Refer toINSPECTION - Step 1 .

NG → REPLACE FUEL PRESSURE SENSOR 

OK: Go to next step 

1. Disconnect the E83 ECM connector.
2. Disconnect the E72 fuel pressure sensor connector.
3. Measure the resistance.

   Standard resistance (Check for open)

   Tester Connection	Specified Condition
   VC (E83-125) - VC (E72-3)	Below 1 Ω
   PR (E83-115) - PR (E72-2)	Below 1 Ω
   E2 (E83-103) - E2 (E72-1)	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Specified Condition
   VC (E83-125) or VC (E72-3) - Body ground	10 kΩ or higher
   PR (E83-115) or PR (E72-2) - 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   5