Toyota Tundra. Manual — part 1744

b

Remove the 4 nuts, front water by-pass joint and 2 gaskets

Fig. 41: Locating Front Water By-Pass Joint And Nuts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

11

REMOVE AIR TUBE

a

Disconnect the No 2 and No 3 hoses

Fig. 42: Locating No. 2 And No. 3 Hoses
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b

Disconnect the air pump connector

c

Disconnect the air pump connector clamp's holder

d

Using a clip remover, detach the wire harness claw

e

Remove the 2 bolts and air tube

2009 Toyota Tundra

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

Fig. 43: Locating Air Tube Bolts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

f

Disconnect the 2 No 1 air hoses from the air tube

12

REMOVE AIR SWITCHING VALVE ASSEMBLY

a

Disconnect the knock sensor connector

b

Remove the bolt and bracket

c

Disconnect the 2 air switching valve connectors

Fig. 44: Locating Air Switching Valve Assembly
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

d

Remove the 3 bolts and air switching valve

Fig. 45: Locating Air Switching Valve And Bolts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

13

REMOVE NO. 2 AIR TUBE

a

Remove the 2 bolts, No 2 air tube and gasket

NOTE:

Be careful not to damage the installation surface of the gaskets.

2009 Toyota Tundra

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

Fig. 46: Locating No. 2 Air Tube Bolts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

14

REMOVE NO. 3 AIR TUBE

a

Remove the 2 bolts, No 3 air tube and gasket

Fig. 47: Locating No. 3 Air Tube Bolts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION

1

INSPECT AIR SWITCHING VALVE ASSEMBLY

a

Measure the resistance according to the value(s) in the table below

Standard Resistance

RESISTANCE REFERENCE

NOTE:

Be careful not to damage the installation surface of the gaskets.

Tester Connection

Condition

Specified Condition

1 - 5

20°C (68°F)*

4 5 to 5 5 ohms

1 - Body ground

Always

1 Mohms or higher

5 - Body ground

HINT:
*: Make sure that the air switching valve is at ambient temperature before measuring the

2009 Toyota Tundra

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

Fig. 48: Inspecting Air Switching Valve Assembly
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

If the result is not as specified, replace the air switching valve assembly

b

Check the operation of the air switching valve

1

Check that air does not flow from port A to port B

If the result is not as specified, replace the air switching valve assembly

resistance

NOTE:

When applying voltage, do not touch terminals 2, 3 and 4.

NOTE:

Make sure the applied pressure is 30 kPa (0.3 kgf/cm

2

, 4.4 psi)

or less

2009 Toyota Tundra

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