On-Vehicle Inspection

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUEL CUT-OFF RPM
1. Start and warm up the engine.
2. Increase the engine speed to at least 3500 rpm.
3. Use a sound scope to check for injector operation noise.
4. Check that when the accelerator pedal is released, injector operation noise stops momentarily and then resumes.
  If the result is not specified, check the injector, wiring and ECM.
VISUALLY INSPECT HOSES, CONNECTIONS AND GASKETS
1. Check that there are no cracks, leaks or damage.
  NOTE:
  - Detachment or other problems with the engine oil dipstick, filler cap, ventilation hose and other components may cause the engine to run improperly.
  - Air suction caused by disconnections, looseness or cracks in the parts of the air induction system between the throttle body and cylinder head will cause engine failure or engine malfunctions.
  If the result is not as specified, replace parts as necessary.
  
  Fig 1: Inspecting Hoses, Connections And Gaskets
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT FUEL CUT OFF VALVE AND FILL CHECK VALVE
1. Disconnect the vent line hose from the fuel tank.
2. Connect the pressure gauge to the fuel tank.
3. Fill the fuel tank with fuel enough.
4. Apply pressure of 4 kPa (0.04 kgf/cm² , 0.58 psi) to the vent port of the fuel tank.
  HINT:
  
  It is necessary to check the amount of fuel in the fuel tank. When the fuel tank is full, the float valve of the fill check valve is closed and no air can pass through.
  
  Fig 2: Inspecting Fuel Cut Off Valve And Fill Check Valve
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 fuel tank.
CHECK AIR INLET LINE
1. Disconnect the air inlet line hose from the canister.
2. Check that there is ventilation in the air inlet line.
  If air cannot flow freely into the air inlet line, repair or replace it.
  
  Fig 3: Checking Air Inlet Line
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Reconnect the air inlet line hose to the canister.

INSPECT PRESSURE SENSOR

Connect a pressure gauge to the air pressure sensor as shown in the illustration.

Fig 4: Connecting Pressure Gauge To Air Pressure Sensor

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Connect the Techstream to the DLC3.
Turn the ignition switch ON and turn the tester ON.
Enter the following menus:
Techstream - Select: Powertrain / Engine and ECT / Data List / All Data / Air pump pressure (absolute) and Air pump2 pressure (absolute).
Check that the pressure displayed on the tester fluctuates when applying pressure to the pressure sensor with the pressure gauge.
OK: Pressure fluctuates in response to pressure applied with pressure gauge.

NOTE: When applying pressure, make sure that no foreign matter enters the sensor.

HINT:

The taster displays the air pump pressure (AIR PMP PRS (A) and AIR PMP2 PRS (A)) as absolute pressure.

Check the power source voltage.

Disconnect the connector.
Turn the ignition switch ON.

Measure the voltage according to the value(s) in the table below.

Standard voltage

PRESSURE SENSOR STANDARD VOLTAGE

Tester Connection	Condition	Specified Condition
for Bank 1: 2 (VC) - 4 (E2)	Ignition switch ON	4.25 to 5.2S V
for Bank 2: 2 (VC2) - 4 (E22)	Ignition switch ON	4.25 to 5.2S V

Fig 5: Checking Power Source Voltage