Inspection Procedure

HINT:

Read freeze frame data using the 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 USING TECHSTREAM (FUEL PRESSURE) 
   1. Connect the Techstream to the DLC3.
   2. Start the engine.
   3. Turn the Techstream ON.
   4. Enter the following menus: 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: 

      COMPONENT OPERATING RANGE
      
      

      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 running 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 terminals of the fuel pressure sensor connector.

      Standard voltage 

   FUEL PRESSURE SPECIFICATION
   
   

   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 Terminal VC And E2 Of H17 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 FUEL PRESSURE SENSOR )

   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) 

      STANDARD VOLTAGE SPECIFICATION
      
      

      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) 

   STANDARD RESISTANCE SPECIFICATION
   
   

   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 H17 Fuel Pressure Sensor And E1 With E3 ECM Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE ECM  (See REMOVAL )