Fuel Tank, Draining, Fuel Delivery Unit Not Faulty

WARNING: This page is about a different car, the 2022 Audi Q7, 2021 Audi Q7, and 2020 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Vehicle Diagnostic Tester
Fuel Extractor: VAS5190A
Fuel Extraction - Adapter 2: VAS5190/2

Procedure

-- Observe the safety instructions. Refer to SAFETY PRECAUTIONS .

-- Follow the guidelines for clean working conditions. Refer to GUIDELINES FOR CLEAN WORKING CONDITIONS .

-- Switch off the ignition.

-- Attach a suitable adapter from the : VAS5190/10 onto the suction hose -1- from the : VAS5190A .

Fig 1: Fuel Extracting Device

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-- Open the fuel filler door.

Fig 2: The Fuel Filler Cap

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-- Remove the fuel filler neck cap -arrow-.

CAUTION:

There is a risk of the fuel tank exploding due to electrostatic discharge.

Severe injuries and burns are possible.

- Attach the fuel siphoning device ground cable to a bare area on the body.

Q7 Before Product Improvement:

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There Is a Risk of Injury Due to the Fuel Being under Pressure.

The fuel system is under pressure. Injuries are possible from fuel spraying out.

Before opening the fuel system:

-- Wear protective eyewear.

-- Wear safety gloves.

-- Reduce the pressure: place clean cloths around the connection point and carefully open the connection point.

-- Free up the fuel hose from the brackets -1 and 3- and disconnect the connector coupling -2-. Refer to CONNECTOR COUPLINGS, DISCONNECTING .

Q8 and Q7 from Product Improvement:

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CAUTION:

There is a risk of injury due to the fuel being under pressure.

The fuel system is under pressure. Injuries are possible from fuel spraying out.

Before opening the fuel system:

-- Wear protective eyewear.

-- Wear safety gloves.

-- Reduce the pressure: place clean cloths around the connection point and carefully open the connection point.

-- Free up the fuel hose -1- at the bracket -2- and disconnect the connection coupling -3-. Refer to CONNECTOR COUPLINGS, DISCONNECTING .

Continuation for All Vehicles:

-- Connect the suction hose with the : VAS5190/2 to the supply line in the engine compartment.

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-- Use the : VAS5190A to drain the fuel tank through the supply line.

-- Connect the Vehicle Diagnostic Tester.

-- Switch the ignition on.

-- Select and start OBD mode.

Drivetrain
Engine
01 - OBD-capable systems
01 - Engine electronics
Basic setting
Drain fuel tank

-- Start the basic setting without measured values: the fuel pump starts.

-- When no more fuel is being extracted, press Stop .