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Checking fuel tank breather: engine code AJH: VW Sharan I / SEAT Alhambra 1.8 (AJH, AWC)

Step-by-step checking fuel tank breather: engine code AJH for the VW Sharan I / SEAT Alhambra 1.8 (AJH/AWC): 13 steps.

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

13 steps 2 engine codes

🧭 Before you start

Fits: VW Sharan I / SEAT Alhambra (7M)

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  • Operate hand vacuum pumpV.A.G 1390 several times. Vacuum must not build up.
  • Operate hand vacuum pumpV.A.G 1390 several times. Vacuum must build up.

🔧 Engine codes this applies to

AJHAWC

📐 16 workshop diagrams for AJH

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

Checking fuel tank breather: engine code AJH — AJH · diagram 1
Checking fuel tank breather: engine code AJH — AJH · diagram 2
Checking fuel tank breather: engine code AJH — AJH · diagram 3
Checking fuel tank breather: engine code AJH — AJH · diagram 4
Checking fuel tank breather: engine code AJH — AJH · diagram 5
Checking fuel tank breather: engine code AJH — AJH · diagram 6
Checking fuel tank breather: engine code AJH — AJH · diagram 7
Checking fuel tank breather: engine code AJH — AJH · diagram 8
+ 8 more diagrams
🔒 16 workshop diagrams for this job Ask about your VW AJH — free or sign up free to see the drawings

📋 Procedure

  1. Pull off breather line (5) of activated charcoal filter (1) from throttle valve control module (3).
  2. Connect hand vacuum pumpV.A.G 1390 to line (5).
  3. Pull breather line (4) from fuel tank off activated charcoal filter and connect to "„connection A“" of vacuum testerV.A.G 1368.
  4. Connect vacuum testerV.A.G 1368"„connection B“" to breather line (2) to activated charcoal filter.
  5. Set vacuum tester to position "„B“".
AJH? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Initiate final control diagnosis and select activated charcoal filter system solenoid valve 1N80, 01Performing final control diagnosis.
  2. Operate hand vacuum pumpV.A.G 1390 several times. Vacuum must not build up.
  3. Check breather connection (6) on activated charcoal filter (1) for soiling and clean if necessary.
  4. Connect hand vacuum pumpV.A.G 1390 to vacuum testerV.A.G 1368"„connection B“".
  5. Set vacuum tester to -A/B- position.
  6. Operate hand vacuum pumpV.A.G 1390 several times. Vacuum must build up.
  7. Check pressure retention valve .
  8. Check line (1) from fuel tank for leaks.
Workshop diagrams

Ask TorqFix about your VW AJH — 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 AJH — 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.