Current Draw, Checking

Fuel Pump, Checking

• When replacing the fuel delivery unit, check the fuel tank for visible contamination and clean if necessary.

Special tools, testers and auxiliary items required

• Pressure Tester (VAS 6550)

• Remote Control (V.A.G 1348/3A)

• Test Instrument Adapter/DSO (5-pin) (VAS 5565)

• Multi-meter (V.A.G 1715)

• Wrench (T10202)

• Measuring Container, 2 Liter

Current Draw, Checking

- Remove the rear seat bench.

- Remove the cover - 1 - with the fuel pump control module (J538) - 2 - from the fuel delivery unit.





- First gently pull on the connector - A - without pressing the retainer to make sure it securely connected. If the connector was not connected correctly, it could cause a fault.





- Disconnect the connector.

- Check the contacts on the connector and the fuel delivery unit for damage.

- Install the (VAS 5565) between the connectors on the fuel delivery unit and cover.





- Connect the current clamp - A - to the red wire with the word "current clamp" on the (VAS 5565).

- Start the engine and run at idle speed.

- Measure the current draw of the fuel pump.

• Specified value: maximum 10 amps

• The fuel pump starting current may be higher than the specified value briefly when starting the engine.

• If the malfunction in the fuel system only occurs sporadically, the test can also be performed during a road test. A second person is needed to do this.

If the current draw is exceeded:

- Replace the fuel delivery unit if the fuel pump is faulty. Refer to => [ Fuel Delivery Unit ] Fuel System Components.