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Checking variable intake manifold flap change-over valve N239 — VW

Checking variable intake manifold flap change-over valve N239 on VW: 11 steps, engines AGD, AKU, ASX.

Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.

11 steps 3 engine codes

🧭 Before you start

  • Renewed: engine control unit

Don't miss

  • Switch off ignition. The voltage value must fall to 0.0 V after approx. 3 seconds.

🔧 Engine codes this applies to

AGDAKUASX

📐 18 workshop diagrams for AGD

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

Checking variable intake manifold flap change-over valve N239 — AGD · diagram 1
Checking variable intake manifold flap change-over valve N239 — AGD · diagram 2
Checking variable intake manifold flap change-over valve N239 — AGD · diagram 3
Checking variable intake manifold flap change-over valve N239 — AGD · diagram 4
Checking variable intake manifold flap change-over valve N239 — AGD · diagram 5
Checking variable intake manifold flap change-over valve N239 — AGD · diagram 6
Checking variable intake manifold flap change-over valve N239 — AGD · diagram 7
Checking variable intake manifold flap change-over valve N239 — AGD · diagram 8
+ 10 more diagrams
🔒 18 workshop diagrams for this job Ask about your VW AGD — free or sign up free to see the drawings

📋 Procedure

  1. Pull 2-pin connector off variable intake manifold flap change-over valve N239(arrow).
  2. Measure resistance between change-over valve contacts.
  3. Renew inlet connection together with variable intake manifold flap change-over valve N239, Removing and installing inlet connection.
  4. Read fault memory, if necessary, repair any faults and then clear fault memory , Reading and clearing fault memory.
  5. Set hand multimeter V.A.G 1526C or multimeter V.A.G 1715 to measure voltage and connect to contacts 1 + 2 of disconnected connector for variable intake manifold flap change-over valve N239.
AGD? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Start engine and run at idling speed.
  2. Switch off ignition. The voltage value must fall to 0.0 V after approx. 3 seconds.
  3. Connect adapter cable, 121-pin V.A.G 1598/31 to control unit wiring harness. The engine control unit remains disconnected.
  4. Check wiring between adapter cable, 121-pin V.A.G 1598/31 and connector for open circuit referring to current flow diagram. Contact 1 + socket 1 Contact 1 + socket 2 Contact 2 + socket (repair group 62).
  5. Also check wiring for short to one another, short to vehicle earth and short to battery positive.
  6. Renew engine control unit (see the separate procedure).
Workshop diagrams

Ask TorqFix about your VW AGD — it answers with the exact sequence for that engine and the workshop drawing for each step. First question is free after a 20-second sign-up, no card.

Ask about your VW AGD — free → or sign up free to see the drawings

Other VW procedures

Who makes these pages, and how

TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.

The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.

Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.

Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com

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Workshop data on this page last updated 20 Sep 2026.