Checking secondary air inlet valve - system without vacuum control — AUDI

🧭 Before you start

Fits: Audi A5 (8T, 2007–2016)

Don't miss

• Disregard (items 1, 2).
• Risk of violating emission legislation applying to USA models.Do NOT open hose connection (2). — Release hose clip (4) and clamps (arrows) and move air pipe clear to one side (crankcase breather hose (2) remains connected).
• Disregard (items 1, 2, 3).
• Blow lightly into test hose with your mouth (do not use compressed air).
• Blow more firmly (i.e. with greater pressure) into test hose with your mouth (do not use compressed air).

🔧 Engine codes this applies to

📐 1 workshop diagram for CAUA

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. Remove engine cover panel (arrows).
2. Remove plenum chamber partition panel General body repairs, exterior50Bulkhead; Exploded view - plenum chamber partition panel.
3. Press release tabs and disconnect secondary air hose (3). [Note: Disregard (items 1, 2).]
4. Move clear fuel line and line going to activated charcoal filter at air pipe.
5. Unplug electrical connector (1) from air mass meter G70.

6. Disconnect vacuum line (3) from air pipe.
7. Disconnect crankcase breather hose (2) from air pipe by pressing release tabs.
8. Remove air pipe and air mass meter G70. To do so, release hose clip (4) and clamps (arrows).
9. ⚠ Risk of violating emission legislation applying to USA models.Do NOT open hose connection (2). — Release hose clip (4) and clamps (arrows) and move air pipe clear to one side (crankcase breather hose (2) remains connected).
10. Press release tabs and disconnect secondary air hose (arrow). [Note: Disregard (items 1, 2, 3).]
11. Connect test hose (arrow) to combination valve for secondary air system.
12. Blow lightly into test hose with your mouth (do not use compressed air).
13. Blow more firmly (i.e. with greater pressure) into test hose with your mouth (do not use compressed air).
14. Renew combination valve for secondary air system if you cannot determine the switching point: (left-side) , (right-side)
15. Install plenum chamber partition panel General body repairs, exterior50Bulkhead; Exploded view - plenum chamber partition panel.

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