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HOMESERVICE MANUALSAUDI2010A3 2.0T, 2.0 E, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 4 (3.2L - GENERIC SCAN TOOL - ENGINE CODE(S): BUB)ST GENERIC SCAN TOOLDESCRIPTION AND OPERATIONSECONDARY AIR INJECTION SYSTEMCOMBINATION VALVE FOR SECONDARY AIR INJECTION, CHECKING FUNCTION AND PROPER SEAL
2010 Audi A3 2.0T, 2.0 E, Standard

Combination Valve For Secondary Air Injection, Checking Function And Proper Seal

2010 Audi A3 2.0T, 2.0 E, StandardSECTION Combination Valve For Secondary Air Injection, Checking Function And Proper Seal
WARNING: This page is about a different car, the 2007 Audi A3 and 2006 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.

The following procedure is used to test all combination valves.

Special tools and workshop equipment required 

  • Hand vacuum pumpV.A.G 1390
    Fig 1: Identifying Hand Vacuum Pump - V.A.G 1390
    GWWW00-0515Courtesy of AUDI OF AMERICA, LLC

Test conditions

  • Vacuum lines and hose connections free of leaks.
  • Vacuum lines not plugged.

Test sequence

-- Remove the vacuum hose from the combination valve.

-- Connect hand vacuum pumpV.A.G 1390 to combination valve vacuum connection.

Fig 2: Connecting Hand Vacuum Pump V.A.G 1390 To Combination Valve Vacuum Connection
GWWA26-0780Courtesy of AUDI OF AMERICA, LLC

-- Remove the air duct hose -arrow- from the Throttle Valve Control Module -J338- and position aside.

Fig 3: Identifying Air Guide Hose At Throttle Valve Control Module J338
GWWA10-1896Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the Secondary Air Injection hose -arrow-.

Fig 4: Disconnecting Secondary Air Hose
GWWA10-1791Courtesy of AUDI OF AMERICA, LLC

-- Inject a light air pressure into the in Secondary Air Injection hose to close the combination valve. (do not use compressed air).

  • The combination valve should close and seal. Air should not be able to pass through the combination valve.

-- Operate the hand vacuum pump.

  • The combination valve should open. Air should be able to pass through the combination valve.

If combination valve does not open:

-- Replace the faulty combination valve.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.