Toyota Sequoia (2005). Manual - part 684

B17514

AIP

E2

EC0NY–01

B17665

B17515

1

2

B17516

Air

–

EMISSION CONTROL

SECONDARY AIR INJECTION SYSTEM

EC–17

2725

SECONDARY AIR INJECTION
SYSTEM

ON–VEHICLE INSPECTION

1.

INSPECT PRESSURE SENSOR

(a)

Turn the ignition switch to the ON position.

(b)

Measure the voltage between terminals AIP and E2 of the
ECM connector.
Voltage: 1.0 to 2.2 V

If the voltage is not as specified, replace the pressure sensor.

2.

INSPECT VSV FOR AIR INJECTION SYSTEM

(a)

Disconnect the connector from the VSV.

(b)

Disconnect the 2 vacuum hoses from the VSV.

(c)

Using an ohmmeter, measure the resistance between the
terminals.
Standard:

Tester Connection

Specified Condition

1 – 2

33 to 39 

Ω

 at 20

°

C (68

°

F)

1 – Body ground

10 M

Ω

 or higher

2 – Body ground

10 M

Ω

 or higher

If the resistance is not as specified, replace the VSV.

(d)

Check that air does not flow from the port as shown in the
illustration.

If the result is not as specified, replace the VSV.

B17517

Air

B17612

B17613

EC–18

–

EMISSION CONTROL

SECONDARY AIR INJECTION SYSTEM

2726

(e)

Apply positive battery between the terminals, check that
air flows from the ports.

If the result is not as specified, replace the VSV.
(f)

Connect the 2 vacuum hoses to the VSV.

NOTICE:
Be sure to connect the vacuum hoses correctly.
(g)

Connect the connector to the VSV.

(h)

Perform procedures (a) to (g) to the other VSV.

3.

INSPECT NO. 2 AIR SWITCHING VALVE

(a)

Disconnect the vacuum hose from the VSV for the air in-
jection system.

(b)

Apply vacuum (30 kPa (306 gf/cm

2

, 4.35 psi) to vacuum

hose, check that the vacuum does not decrease.

If operation is not as specified, replace the No.2 air switching
valve.

(c)

Release the vacuum, and check that the operation sound
is emited from the No.2 air switching valve.

If operation is not as specified, replace the No.2 air switching
valve.
(d)

Perform procedures (a) to (c) to the other No.2 air seitch-
ing valve.

EC0NZ–01

B17631

Throttle Body Cover

PS Air Hose

Intake Air Connector

Suction Hose

MAF Meter Wire

PCV Hose

Vacuum Hose

Air Injection Control
Driver

N·m (kgf·cm, ft·lbf) : Specified torque

7.5 (76, 66 in.·lbf)

–

EMISSION CONTROL

SECONDARY AIR INJECTION SYSTEM

EC–19

2727

COMPONENTS

B17518

 Gasket

 Gasket

Air Switching Valve No.2

Air Tube No.3

Air Tube No.3

 Gasket

Injection Connector

Engine Wire

VSV Connector
for EVAP

Fuel Return Hose

N·m (kgf·cm, ft·lbf) : Specified torque

 Non–reusable part

 Gasket

 Gasket

Air Pump Assembly

Intake Manifold Assembly

 Gasket

 Gasket

7.5 (76, 66 in.·lbf)

VSV for Air Injection System

18 (185, 13)

18 (185, 13)

18 (185, 13)

10 (102, 7 )

16 (163, 12)

16 (163, 12)

10 (102, 7 )

10 (102, 7)

EC–20

–

EMISSION CONTROL

SECONDARY AIR INJECTION SYSTEM

2728