Checking fuel pump non-return valve, engine code BGU: VW Touran I 1.6 (BGU)

🧭 Before you start

Fits: VW Touran I (1T, 2003–2015)

• Renewed: fuel pump unit

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• Watch pressure drop on pressure gauge. After 10 minutes, pressure must not drop below 3 bar.

🔧 Engine codes this applies to

📐 56 workshop diagrams for BGU

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

📋 Procedure

1. Open cover of relay and fuse holder of engine compartment electronics box.
2. Pull fuse SB 33 out of socket F 33 of fuse holder.
3. Connect remote controlV.A.G 1348/3 A with adapter cableV.A.G 1348/3-3 to right terminal of fuse socket F33.
4. Tape off 2nd connector contact of adapter cableV.A.G 1348/3-3 with insulating tape (arrow) to prevent short circuits.
5. Connect crocodile clip to vehicle battery (+).

6. ⚠ The fuel supply line is under pressure! Wear eye protection and protective clothing to avoid possible injuries and skin contact. Before loosening hose connections, wrap a cloth around the connection. Then release pressure by carefully pulling hose off connection. — Pull fuel supply line (arrow) off fuel filter.
7. Connect pressure testerVAS 6550 to fuel supply line with adapterVAS 6550/1. Hold adapterVAS 6550/2 in a measuring container.
8. Close pressure gaugeVAS 6550 shut-off tap (A) (lever at right angles to direction of flow).
9. Operate remote control at short intervals until a pressure of approx. 4 bar has built up.
10. ⚠ Danger of spray when shut-off tap is opened. Wear eye protection and protective clothing to avoid injuries and skin contact. Hold container before free connection of pressure tester. — If pressure builds up too high, relieve excess pressure by carefully opening shut-off tap.
11. Watch pressure drop on pressure gauge. After 10 minutes, pressure must not drop below 3 bar.
12. Check line connections for leaks.
13. Fuel pump defective, renew fuel pump unit .

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