Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSAUDI2005A6 3.2 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 3 (4.2L V8 5V GENERIC SCAN TOOL, ENGINE CODE(S): BNK)20 FUEL SUPPLYFUEL SUPPLY SYSTEMFUEL PUMP ELECTRICAL, CHECKING

2005 Audi A6 3.2 T

Fuel pump electrical, checking

2005 Audi A6 3.2 TSECTION Fuel pump electrical, checking

WARNING: This page is about a different variant/trim than selected.

Special tools, testers and auxiliary items required

Remote control V.A.G 1348/3 A with adapter cable V.A.G 1348/3-2
Multimeter V.A.G 1526 B or equivalent.
Connector test set V.A.G 1594 C.

Test requirements

Fig 1: Identifying Fuse Panel

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Battery voltage at least 12.5 V.

Fig 2: Identifying Fuse Panel In Center Bracket Of Instrument Panel

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Fuse 1 of right fuse panel in center bracket of instrument panel - 2 - is OK.

Fig 3: Removing Bolt And Pulling Oil Dipstick Guide Tube Upward And Out

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Vehicles with MPI engine: Fuel Pump (FP) Relay -J17- in relay and fuse carrier, position - 2 - in left electronics box is OK.
Vehicles with FSI engine: Fuel Pump (FP) Control Module -J538- OK; checking. → 20 - Fuel Supply Diagnosis and Testing
Fuel filter OK.
Ignition switched off.

Test sequence

Remove rear seat bench → 72 - Seat - Frames Removal And Installation .

Fig 4: Removing Cover Bolts For Locking Flange

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Remove cover for right locking flange - arrows -.

Fig 5: Disconnecting Electrical Harness Connector At Locking Flange

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Disconnect electrical harness connector - arrow - at locking flange.

Fig 6: Connecting Remote Control V.A.G 1348/3A With Adapter Cable V.A.G 1348/3-2 With An Adapter Cable From Connector Test Set V.A.G 1594C At Terminal

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Connect remote control V.A.G 1348/3 A with connection V.A.G 1348/3-2 to contact - 1 - using an adapter cable from connector test set V.A.G 1594 C.
Connect contact - 5 - to vehicle Ground (GND) using a jumper cable from connector test set V.A.G 1594 C.
Connect alligator clip to vehicle battery positive (+).
Press switch on remote control.

Running noise of pump must be audible.

NOTE:

The Fuel Pump (FP) runs quietly. Avoid surrounding noises while testing the fuel pump.

If no operating noise can be heard:

Fig 7: Checking Electrical Circuit Between Terminals Of Fuel Delivery Unit And Fuel Pump For Continuity

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Remove fuel delivery unit. → Fuel delivery unit, removing and installing .
Check if electrical wiring between flange and fuel pump is connected and has continuity.

If no malfunction is detected in wiring, Fuel Pump (FP) is faulty. Replace fuel pump.

Install fuel delivery unit. → Fuel delivery unit, removing and installing .

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.