Audi Workshop Service and Repair Manuals > A3 Mk2 > Power unit | Fuel supply system, petrol engines | Fuel supply, gas operation | Fuel delivery unit and fuel gauge senders - version 2 for vehicles with four-wheel drive | Checking fuel pump (electrical test)

Checking fuel pump (electrical test) - TFSI and 6-cylinder engines

Special tools and workshop equipment required

t	Remote control -V.A.G 1348/3A- for V.A.G 1348 with adapter cable -V.A.G 1348/3-3-

t	Hand-held multimeter -V.A.G 1526C-

t	Auxiliary measuring set -V.A.G 1594C-

Procedure

Observe test conditions → Chapter.

–	Remove rear seat bench → Rep. gr.72.

–	Unclip the retaining tabs -arrows- for the flange cover (right-side).

–	Unplug electrical connector -arrow- at flange.

–	Connect remote control -V.A.G 1348/3A- for V.A.G 1348 to contact -1- using adapter cable -V.A.G 1348/3-3- and test lead from auxiliary measuring set -V.A.G 1594C-.

–	Tape off 2nd connector contact of adapter cable -V.A.G 1348/3-3- with insulating tape -arrow- to prevent short circuits.

–	Connect contact -5- to the body (earth) using a test lead from auxiliary measuring set -V.A.G 1594C-.

–	Connect crocodile clip to battery „+“.

–	Press remote control button.

l	Pump should start running audibly.

Note

The fuel pump runs very quietly. Where possible, avoid noisy surroundings for this test.

If no noise can be heard from pump:

–	Remove fuel delivery unit → Chapter.

–	Check that the electrical wires between flange and fuel pump are connected and test for continuity.

If no fault is found in wiring, fuel pump is defective. Renew fuel delivery unit.

–	Install fuel delivery unit → Anchor.

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