Inspection Procedure

HINT:

Read freeze frame data using the Intelligent tester or Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. READ VALUE OF INTELLIGENT TESTER OR TECHSTREAM (FUEL PRESSURE) 
   1. Connect the Intelligent tester or Techstream to the DLC3.
   2. Start the engine.
   3. Turn the tester ON.
   4. Enter the following menus:
      1. Intelligent tester - Select: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / FUEL PRESS.
      2. Techstream - Select: Powertrain / Engine / Data List / All Data / Fuel Press.
   5. Read the values.

      Pressure: 4 to 13 MPa (40.8 to 132.6 kgf/cm ²  , 580 to 1885 psi). 

      Result: 

      FUEL PRESSURE
      
      

      Fuel Pressure (MPa)	Proceed to
      19.6 or more	A
      0.0	B
      OK [4 to 13 MPa (40.8 to 132.6 kgf/cm2 , 580 to 1885 psi)] *	C

      HINT:

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

   B: Go to step   3 

   C: CHECK FOR INTERMITTENT PROBLEMS (See  CHECK FOR INTERMITTENT PROBLEMS  ) 

   A: GO TO NEXT STEP 

2. INSPECT ECM (VC VOLTAGE) 
   1. Disconnect the H17 fuel pressure sensor connector.
   2. Turn the engine switch on (IG).
   3. Measure the voltage between the terminal of the fuel pressure sensor connector.

      Standard voltage 

      ECM (VC VOLTAGE)
      
      

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

      Fig 1: Identifying Connector Terminal Of Fuel Pressure Sensor Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: Go to step   4 

   OK: GO TO NEXT STEP 

3. INSPECT FUEL PRESSURE SENSOR 
   1. Inspect the fuel pressure sensor (see INSPECTION ).

   NG: REPLACE FUEL PRESSURE SENSOR  (See REMOVAL )

   OK: GO TO NEXT STEP 

4. CHECK HARNESS AND CONNECTOR (FUEL PRESSURE SENSOR - ECM) 
   1. Disconnect the H17 fuel pressure sensor connector.
   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) 

      FUEL PRESSURE SENSOR - ECM (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) 

      FUEL PRESSURE SENSOR - ECM (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

      Fig 2: Identifying Connector Terminal Of Fuel Pressure Sensor

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE ECM (See  REMOVAL  )