Secondary Air Injection Combination Valves, Checking

Special tools and workshop equipment required 

• Hand vacuum pump VAS 6213 or hand vacuum pump VAG 1390

Conditions

• The Secondary Air Injection (AIR) solenoid valve or AIR solenoid valve 2 was checked using the vehicle diagnosis, testing and information system VAS 5051B in "Guided Fault Finding".

Test Sequence

If the AIR solenoid valve and AIR solenoid valve 2 are OK:

-- Check the vacuum system, including the vacuum reservoir in intake manifold, for leaks.

-- Check whether the vacuum lines are correctly connected.

-- Check that vacuum hoses are not porous.

If no malfunction was found:

-- Disconnect the secondary air hose at the position indicated by the -arrow-.

Fig 1: Disconnecting Secondary Air Hose

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Lightly blow into the hose to the combination valve. DO NOT used compressed air.

• Both combination valves must be closed, it must not be possible to blow through hose.

-- Remove the vacuum hose from the combination valve.

-- Connect the VAS 6213 to the left combination valve.

Fig 2: Connecting Hand Vacuum Pump V.A.G 1390 To Combination Valve Vacuum Connection

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Operate the VAS 6213 several times.

• The combination valve must open, it must be possible to blow through.

If the combination valve does not open:

-- Replace the left combination valve. Refer to SECONDARY AIR INJECTION SYSTEM COMPONENTS ASSEMBLY OVERVIEW .

-- Repeat the test on the right combination valve.