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HOMESERVICE MANUALSAUDI2009A6 BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 53 (4.2L V8 5V GENERIC SCAN TOOL, ENGINE CODE(S): BNK)20 FUEL SUPPLYFUEL SUPPLY SYSTEMFUEL PUMP (FP), CHECKING DELIVERY QUANTITY
2009 Audi A6 Base

Fuel Pump (FP), checking delivery quantity

2009 Audi A6 BaseSECTION Fuel Pump (FP), checking delivery quantity
WARNING: This page is about a different car, the 2006 Audi A6 and 2005 Audi A6. However, it is still accessible from the selected car via links, so may be relevant.

Special tools, testers and auxiliary items required 

  • Pressure gauge set V.A.G 1318.
  • Adapter V.A.G 1318/11.
  • Adapter V.A.G 1318/12.
  • Remote control V.A.G 1348/3 A with adapter cable V.A.G 1348/3-3 or equivalent.
  • Measuring container, fuel-resistant.

Test requirements 

Fig 1: Identifying Fuse Panel In Center Bracket Of Instrument Panel
GW00022390Courtesy of VOLKSWAGEN UNITED STATES, INC.
  • Battery voltage at least 12.5 V.
Fig 2: Removing Bolt And Pulling Oil Dipstick Guide Tube Upward And Out
GW00017994Courtesy of VOLKSWAGEN UNITED STATES, INC.
  • 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.
  • Fuel tank at least 1 /4 filled.
  • Ignition switched off.

Test sequence 

Fig 3: Removing Cover Bolts For Locking Flange
GW00014428Courtesy of VOLKSWAGEN UNITED STATES, INC.
  • Remove bolts - arrows  - and remove cover for right locking flange.
Fig 4: Disconnecting Electrical Harness Connector At Locking Flange
GW00022380Courtesy of VOLKSWAGEN UNITED STATES, INC.
  • Disconnect electrical connector - arrow  - at locking flange.
Fig 5: Connecting Remote Control Connection V.A.G 1348/3 A With Connection V.A.G 1348/3-3 To Contact Using An Adapter Cable From Connector Test Set V.A.G 1594 C
GW00018711Courtesy of VOLKSWAGEN UNITED STATES, INC.
  • Connect remote control V.A.G 1348/3 A with connection V.A.G 1348/3-3 to contact - 5  - using an adapter cable from connector test set V.A.G 1594 C.
  • Using insulating tape, tape over second contact of remote control connection V.A.G 1348/3-3 to prevent a short circuit - arrow  -.
  • Route switch of remote control V.A.G 1348/3 A forward into engine compartment.
  • Connect alligator clip to Ground (GND) point in engine compartment.
  • Connect contact - 1  - to battery positive terminal (B+) using a self-made jumper cable. For safety reasons, install a fuse - A  - (10 A) in wiring.
  • Remove fuel filler cap from fuel filler tube.
  • Pull rear engine cover off - arrows  -.
  • Pull resonator - 1  - upward - arrow  - and unclip it.
CAUTION: Fuel system is under pressure! Before opening system, place rags around the connection area. Then release pressure by carefully loosening the connection.
RENDER: 1.0x

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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.