Toyota Tundra. Manual — part 1754

Fig. 6: Emission Control - Secondary Air Injection System Wiring Diagram (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

3

EVAP CONTROL SYSTEM DIAGRAM

2009 Toyota Tundra

2009 ENG NE Emission Control (3UR-FE) - Tundra

Fig. 7: Emission Control - EVAP Control System Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

4

EVAP SYSTEM WIRING DIAGRAM

2009 Toyota Tundra

2009 ENG NE Emission Control (3UR-FE) - Tundra

Fig. 8: Emission Control - EVAP System Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

ON-VEHICLE INSPECTION

1

INSPECT FUEL CUT-OFF RPM

a

Start and warm up the engine

b

Open the throttle valve and keep the engine speed at 3000 rpm

c

Use a sound scope to check for injector operating noise

d

Check that when the accelerator pedal is released, injector operation noise stops momentarily and

2009 Toyota Tundra

2009 ENG NE Emission Control (3UR-FE) - Tundra

then resumes

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

2

VISUALLY INSPECT HOSES, CONNECTIONS AND GASKETS

a

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. 9: Inspecting Hoses, Connections And Gaskets
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

3

INSPECT FUEL CUT-OFF VALVE AND FILL CHECK VALVE

a

Disconnect the vent line hose from the fuel tank

b

Connect the pressure gauge to the fuel tank

c

Fill the fuel tank with fuel

d

Apply pressure of 4 kPa (41 gf/cm

2

, 0 6 psi) to the vent port of the fuel tank

HINT:

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
failure malfunctions.

2009 Toyota Tundra

2009 ENG NE Emission Control (3UR-FE) - Tundra