Checking fuel delivery rate of fuel system pressurisation pump G6, engine codes CBAA, CBAB, CBBB, CBAC — VW

🧭 Before you start

Fits: VW Passat CC (357, 2008–2012)

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

Don't miss

• Separate quick-release coupling (A) (completely black or with black marking) of fuel supply line.
• The fuel pump is now activated 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 quick-release coupling (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 activated 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, interior72Rear seats; Removing and installing bench seat / individual seats.
10. Detach carpet under seats and fold it over. General body repairs, interior70Interior 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 activated 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.

Other VW procedures

• Checking the delivery pressure of the fuel pump (0.5 bar low-pressure fuel system)
• Emptying fuel tank with fuel tank less than 3/4 full, vehicles with front-wheel drive
• Removing and installing fuel pressure regulating valve
• Checking the fuel delivery rate of the fuel pump for delivery G6 (0.5 bar low-pressure fuel system)
• Removing and installing glow plugs, engine codes CBAA, CBBB, CBAB, CBBA, CBDB, CBDC, CBAC, CBDA
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