Auxiliary Fuel Pump -V393-, CHECKING DELIVERY RATE

WARNING: This page is about a different car, the 2016 Audi Q5, 2015 Audi Q5, and 2014 Audi Q5. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Vehicle Diagnostic Tester
Hose with inner-diameter 8 mm, fuel resistant
Measuring container, fuel-resistant

Procedure

The Transfer Fuel Pump -G6- fuel delivery rate is OK, refer to Transfer Fuel Pump -G6-, CHECKING, 4- AND 6-CYLINDER GENERATION I ENGINE .

-- Follow all test requirements, refer to TEST CONDITIONS .

-- Follow the rules for clean working conditions, refer to CLEAN WORKING CONDITIONS .

NOTE:

Ignore item -2-.

-- Disconnect the fuel line -1-.

Fig 1: Identifying Fuel lines -1- & -2-

Courtesy of AUDI OF AMERICA, LLC

-- Connect the fuel resistant hose to the fuel supply line -arrow- and hold it inside a fuel resistant container.

Fig 2: Measuring Transfer Fuel Pump Flow Rate

Courtesy of AUDI OF AMERICA, LLC

-- Connect the Vehicle Diagnostic Tester.

-- Turn on the ignition and select the following menu items on the Vehicle Diagnostic Tester:

OBD
Engine electronics
Basic setting
Transfer fuel pump test

-- Press Parameters .

-- To measure, press the Start button again and let the fuel pump run for 15 seconds.

-- After 15 seconds, press the Stop button.

-- Check the amount of fuel in the measuring container.

Specified value: approximately 1 liter (1.05 quart)

If minimum delivery quantity is not obtained, the following malfunctions may be present:

The fuel lines are pinched.
The fuel filter is clogged.
The fuel pump is faulty.

Assemble in reverse order of disassembling. Note the following:

NOTE:

Secure all hose connections with hose clamps of the same type as those equipped by the factory .