Checking function and voltage supply of the fuel pump, engine code CWVA — VW

🧭 Before you start

Fits: VW Golf VII Variant (BA), VW Golf Sportsvan (AM1, 2014–2020), VW Golf VII (5G, 2012–2020)

• Special tools named: VAS 5565
• Renewed: fuel delivery unit

Don't miss

• The fuel pump runs very quietly.If the final control diagnosis is to be carried out several times in succession, it may be necessary to start the engine briefly before repeating the final control diagnosis.
• Do not detach cover completely from floor covering in order to ensure it is reinstalled in the correct installation position.

🔧 Engine codes this applies to

📋 Procedure

1. Observe safety precautions .
2. Observe rules for cleanliness .
3. Connect vehicle diagnostic tester(1) as follows:
4. Connect diagnosis cable connector (2) to diagnostic connection in driver footwell.
5. Switch ignition on.

6. Select final control diagnosis for fuel pump in vehicle self-diagnosis program. [Note: The fuel pump runs very quietly.If the final control diagnosis is to be carried out several times in succession, it may be necessary to start the engine briefly before repeating the final control diagnosis.]
7. Switch off ignition.
8. Remove right rear seat General body repairs, interior72Rear seats; Removing and installing bench seat/individual seats.
9. Partially detach cover (1) in floor covering at parting line (arrow).
10. Do not detach cover completely from floor covering in order to ensure it is reinstalled in the correct installation position.
11. Detach it just enough that the cover can be folded upwards.
12. Fold up cover in (direction of arrow).
13. Remove rear bench seat General body repairs, interior72Rear seat; Removing and installing bench seat / individual seats.
14. Unclip cover (1) for flange on right at retaining tabs (arrows), using removal wedge3409.
15. Unclip sealing grommet (1) downwards from cover (2).
16. Push cover (2) back along wiring harness (3).
17. Check that connector (arrow) is fitted securely by pulling connector without pressing catch.
18. If connector was not inserted correctly, repeat final control diagnosis of fuel pump.
19. Release and pull off connector (arrow).
20. Check contacts on plug and on fuel delivery unit for damage.
21. Connect test instrument/DSO adapter (5-pin)VAS 5565 to connector and fuel delivery unit.
22. Connect multimeter to cables (1) and (5) of test instrument adapter/DSO (5-pin)VAS 5565.
23. Switch ignition on.
24. Locate and eliminate open circuit referring to current flow diagram .
25. Draining fuel tank
26. Pull fuel line (1) off flange. Separate plug-in connectors .
27. Remove fuel line (2) leading to metering pump V54 for auxiliary heater from sealing flange.
28. To do this, open clip at bottom.
29. Carefully pull out fuel line (2).
30. Open locking ring using wrench T10202.
31. Check that electrical wires between flange and fuel pump are connected.
32. Check contacts for damage.
33. Fuel pump is defective, renew fuel delivery unit .

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