Checking fuel delivery rate (engine codes CCZA, CCZB, CDAA, CDAB) — VW

🧭 Before you start

Fits: VW Passat B6 (3C, 2005–2010), VW Passat CC (357, 2008–2012)

• Special tools named: VAS 5052
• Renewed: flange with fuel filter, fuel delivery unit

Don't miss

• Press in securing ring to release fuel lines.
• Make sure that drain tap is closed and cut-off taps are open.
• Press the remote controlV.A.G 1348/3A and slowly close shut-off tap (arrow) until a pressure of 4 bar is displayed on pressure gauge. From this point on do not move position of shut-off tap.

🔧 Engine codes this applies to

📋 Procedure

1. Connect vehicle diagnosis and service information systemVAS 5052 B to vehicle.
2. Select Guided functions in VAS 5052 B.
3. Carry out vehicle identification.
4. Select Engine.
5. Select Checking fuel delivery rate, quick test.

6. Follow instructions on vehicle diagnosis and service information systemVAS 5052 B.
7. ⚠ The fuel line is under pressure.Risk of injury to eyes and skin from fuel.Wear eye protection and protective clothing to avoid eye injuries and skin contact. Before loosening hose connections, wrap a cloth around the connection. Then release pressure by carefully opening the connection point. — Pull supply line (arrow) off at flange and catch escaping fuel with a cloth. [Note: Press in securing ring to release fuel lines.]
8. Connect pressure testerVAS 6550 to flange with adapterVAS 6550/2. Hold adapterVAS 6550/1 in a measuring container.
9. Make sure that drain tap is closed and cut-off taps are open.
10. Press the remote controlV.A.G 1348/3A and slowly close shut-off tap (arrow) until a pressure of 4 bar is displayed on pressure gauge. From this point on do not move position of shut-off tap.
11. Drain measuring container.
12. The delivery rate of the fuel pump depends on the battery voltage. Therefore also connect multimeterV.A.G 1715 to contacts (1) and (5) of adapterVAS 5565.
13. Operate remote control for 60 seconds while measuring voltage at fuel pump.
14. Compare quantity of fuel delivered with specification.
15. Remove cap from fuel filler neck and repeat check. If fuel delivery rate is now reached, check fuel tank breather.
16. Remove fuel delivery unit and check filter strainer for soiling.
17. If no fault is found here either, renew flange with fuel filter.
18. Repeat check.
19. Fuel pump defective, renew fuel delivery unit .

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