Checking variable intake manifold flap changeover valve N239 — AUDI

🧭 Before you start

Fits: Audi A8 D2 (4D)

• Special tools named: V.A.G 1598/30

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• On switching off the engine, the intake manifold flap must close for 1 to 2 seconds.

🔧 Engine codes this applies to

📋 Procedure

1. Start engine.
2. Observe linkage of intake manifold flap whilst a second mechanic switches off the engine.
3. On switching off the engine, the intake manifold flap must close for 1 to 2 seconds.
4. Unplug connector at changeover valve.
5. Connect portable multimeter (resistance measuring range) to changeover valve.

6. Replace variable intake manifold flap changeover valve N239.
7. Connect portable multimeter (voltage measuring range) to contact 2 of connector and earth.
8. Switch on ignition.
9. Check for continuity in wiring from contact 2 via fuse to terminal 30 voltage supply relay J317 and repair if necessary.
10. Connect test box V.A.G 1598/30 to wiring harness to terminal 30 voltage supply relay J317.
11. Eliminate open circuit in wiring/short circuit if necessary.
12. Replace variable intake manifold flap changeover valve N239.

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