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 MANUALSAUDI2001A6 AVANT QUATTROREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMFUEL SUPPLY SYSTEM - ALL ENGINESFUEL TRANSFER SYSTEM - VEHICLES WITH 8 - CYLINDER ENGINEFUEL PUMP (FP) CONTROL MODULE -J538-, CHECKINGTEST CONDITIONS

2001 Audi A6 Avant Quattro

Test conditions

2001 Audi A6 Avant QuattroSECTION Test conditions

Battery voltage at least 12.7 V.
Safety device S81 OK (card location C) is in the relay support, driver's side behind the driver's side shelf.

Fig 1: Identifying Safety Device S81 In The Relay Support
Courtesy of AUDI OF AMERICA, INC.
Fuel pump relay on card location 4 in the central electrical connection behind the driver's side shelf.

Fig 2: Identifying Fuel Pump Relay -4- Location In Central Electrical Connection
Courtesy of AUDI OF AMERICA, INC.
Switch ignition off.

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.