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On-Vehicle Inspection

  1. CHECK PURGE VSV 
    1. Connect the Techstream to the DLC3.
    2. Remove the V-bank cover (See REMOVAL ).
    3. Disconnect the hose (connected to the canister) from the purge VSV.
    4. Start the engine and turn the Techstream main switch on.
    5. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for Evap Control.
      Fig 1: Locating Hose Clamp
      G05637893Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK 

      ACTIVE TEST - PURGE VSV

      Tester Operation Specified Condition
      Activate the VSV for Evap Control: OFF Purge VSV has no suction
      Activate the VSV for Evap Control: ON Purge VSV has suction
    6. Connect the hose (connected to the canister) to the purge VSV.
    7. Install the V-bank cover (See INSTALLATION ).
  2. INSPECT FUEL CUT-OFF RPM 
    1. Start and warm up the engine.
    2. Open the throttle valve and keep the engine speed at 3000 rpm.
    3. Use a sound scope to check for injector operating noise.
    4. Check that when the accelerator pedal is released, the injector operation noise stops momentarily and then resumes.

      If the result is as not specified, check the injector, wiring and ECM.

  3. VISUALLY INSPECT HOSES, CONNECTIONS AND GASKETS 
    1. Check that there are no cracks, leaks or damage.

      HINT:

      Separation of the engine oil dipstick, oil filler cap, ventilation hose, etc. may cause an engine failure or engine malfunctions. Disconnection, looseness or cracks in the parts of the air induction system between the throttle body and cylinder head will allow air suction and cause an engine failure or engine malfunctions.

      Fig 2: Inspecting Hoses, Connections And Gaskets
      G05152334Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • Detachment or other problems with the engine oil dipstick, filler cap, ventilation hose and other components may cause the engine to run improperly.
      • Disconnection, looseness or cracks in the parts of the air induction system between the throttle body and cylinder head will allow air suction and cause an engine failure or engine malfunctions.

      If the result is not as specified, replace parts as necessary.

  4. INSPECT FUEL CUT-OFF VALVE AND FILL CHECK VALVE 
    Fig 3: Applying Pressure To Vent Line Hose
    G05637895Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the vent line hose from the canister.
    2. Connect the pressure gauge to the vent line hose.
    3. Fill the fuel tank with fuel.
    4. Apply a pressure of 4 kPa (41 gf/cm2 , 0.6 psi) to the vent line hose.

      HINT:

      If the fuel tank is full, as the float valve of the fill check valve is closed and has no ventilation, it is necessary to check the fuel amount (volume).

    5. Remove the fuel tank cap, and check that the pressure inside the tank drops.

      If pressure does not drop, replace the fuel tank assembly.

    6. Reconnect the vent line hose to the canister.
  5. CHECK AIR INLET LINE 
    1. Disconnect the air inlet line hose from the charcoal canister.
    2. Check that there is ventilation in the air inlet line.

      HINT:

      If air cannot flow freely into the air inlet line, repair or replace it.

    3. Reconnect the air inlet line hose to the charcoal canister.
      Fig 4: Checking Air Inlet Line
      G05637896Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSPECT PRESSURE SENSOR 
    1. Connect a pressure gauge to the air pressure sensor as shown in the illustration.
    2. Connect the Techstream to the DLC3.
    3. Turn the engine switch on (IG) and turn the Techstream main switch on.
    4. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Air pump pressure (absolute).
    5. Check that the pressure displayed on the Techstream fluctuates when applying pressure to the pressure sensor with the pressure gauge.

      OK: Pressure fluctuates in response to pressure applied with pressure gauge. 

      Fig 5: Connecting Pressure Gauge To Air Pressure Sensor
      G05152337Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Check the power source voltage.
      1. Disconnect the connector.
      2. Measure the voltage according to the value(s) in the table below.

        Standard Voltage 

        STANDARD VOLTAGE SPECIFICATION

        Tester Connection Switch Condition Specified Condition
        C35-2 (VC) - C35-4 (E2) Engine switch on (IG) 4.75 to 5.25 V
        C36-2 (VC2) - C36-4 (E22)

        If the result is not as specified, check the wiring and ECM (See DTC P2431 SECONDARY AIR INJECTION SYSTEM AIR FLOW / PRESSURE SENSOR CIRCUIT RANGE / PERFORMANCE BANK 1; DTC P2432 SECONDARY AIR INJECTION SYSTEM AIR FLOW / PRESSURE SENSOR CIRCUIT LOW BANK 1; DTC P2433 SECONDARY AIR INJECTION SYSTEM AIR FLOW / PRESSURE SENSOR CIRCUIT HIGH BANK 1; DTC P2436 SECONDARY AIR INJECTION SYSTEM AIR FLOW / PRESSURE SENSOR CIRCUIT RANGE / PERFORMANCE BANK 2; DTC P2437 SECONDARY AIR INJECTION SYSTEM AIR FLOW / PRESSURE SENSOR CIRCUIT LOW BANK 2; DTC P2438 SECONDARY AIR INJECTION SYSTEM AIR FLOW / PRESSURE SENSOR CIRCUIT HIGH BANK 2 ).

        Fig 6: Identifying Air Switching Valve Connector
        G05637898Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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