Checking current draw, engine codes CDLG, CAVB, CAVC, CAVD, CBZA, CBZB, CTHD, CTKA — VW

🧭 Before you start

Fits: VW Golf VI (5K, 2008–2013); platform code 521

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

🔧 Engine codes this applies to

📋 Procedure

1. Observe safety precautions .
2. Observe rules for cleanliness .
3. Remove bench seat General body repairs, interior72Rear seat; Removing and installing bench seat / individual seats.
4. Remove cover (1) with fuel pump control unit J538(2) from fuel delivery unit.
5. To do this, unclip cover (1) for flange at retaining tabs (arrows), using removal wedge3409.

6. Check that connector (arrow) is fitted securely by pulling connector without pressing catch. The connector can cause a fault if it has not been fitted correctly.
7. Release and unplug connector.
8. Check contacts on plug and on fuel delivery unit for damage.
9. Connect test instrument adapter/DSO (5-pin)VAS 5565 to connector and fuel delivery unit.
10. Connect pick-up clamp (A) to red terminal with lettering "“pick-up clamp”" for test instrument adapter/DSO (5-pin)VAS 5565.
11. Start engine and run it at idling speed.
12. Measure current draw of fuel pump. [Note: The starting current for the fuel pump can lie briefly above specifications when starting the engine.If the fault in the fuel system is not always evident, the check can also be carried out during a road test. A 2nd person is required to do this, however.]
13. Check fuel lines for possible restrictions (kinks) or blockages.
14. Remove fuel delivery unit and check for contamination.
15. Check fuel pressure .
16. Renew fuel delivery unit .

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