Checking the fuel pump delivery rate for prepressurisation G6, engine codes CBAA, CBAB, CBBB, CBAC, CBDC — VW

🧭 Before you start

Fits: VW Passat B6 (3C, 2005–2010)

• Special tools named: VAS 6551/1
• Renewed: defective line

Don't miss

• Separate plug-in connector (A) (completely black or with black marking) of fuel supply line.
• The fuel pump is now actuated for 30 seconds.
• Press in securing ring to release fuel line.
• Pull fuel supply line (black or black marking) (A) off fuel delivery unit.

🔧 Engine codes this applies to

📋 Procedure

1. Separate connection (A) from supplementary fuel pump V393 or fuel pump 2V277.
2. Separate plug-in connector (A) (completely black or with black marking) of fuel supply line.
3. Connect VAS 6551/1 pressure tester cable to fuel supply (A).
4. Guide open end of line into measuring container.
5. Connect diagnosis tester and perform the guided function "“Checking electric fuel pump(s)”". [Note: The fuel pump is now actuated for 30 seconds.]

6. After fuel flow, read quantity of fuel delivered on measuring container. Specification: at least 1000 ml/30 s
7. Check fuel supply line between fuel pump and engine compartment for kinks, crushes or damage.
8. If necessary, renew defective line and repeat test.
9. If it is not kinked, crushed or damaged, remove rear bench seat General body repairs, interior 72. Rear seats; Removing and installing bench seat / individual seats.
10. Detach carpet under seats and fold it over. General body repairs, interior 70. Interior trim; Assembly overview - foot support and floor covering
11. Remove cover from fuel delivery unit. [Note: Press in securing ring to release fuel line.]
12. Pull fuel supply line (black or black marking) (A) off fuel delivery unit.
13. Connect VAS 6551/1 pressure tester cable to fuel supply (A).
14. Guide open end of line into measuring container.
15. Connect diagnosis tester and perform the guided function "“Checking electric fuel pump(s)”". [Note: The fuel pump is now actuated for 30 seconds.]
16. After fuel flow, read quantity of fuel delivered on measuring container. Specification: at least 1000 ml/30 s
17. Check voltage supply and current draw of fuel pump.

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