Fuel Level Sensor -G-, CHECKING

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 Audi Q7, 2014 Audi Q7, 2013 Audi Q7, 2011 Audi Q7, and 2010 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Analog/Digital Multimeter FLU83III
Connector Test SetVAG1594D
Carpet knife, commercially available

Procedure

Fig 1: Cut The Floor Covering Along The Perforation

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-- Remove the right rear single seat in the second row of seats, refer to Seat Frames .

WARNING:

Risk of injury.

Wear safety gloves

-- Cut the floor covering along the perforation -arrows- on the right side with a carpet knife -1-.

-- Fold carpet cut-out to side -arrow-.

Fig 2: Identifying Locking Flange Cover - Tightening Specifications

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-- Remove nuts -1 to 4- and remove right locking flange cover.

Version 1:

Fig 3: Locking Flange Cover

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-- Disconnect the connector -4- on the right locking flange.

NOTE:

Ignore -1, 2 and 3-.

-- Connect multimeter between terminals -2 and 3- to measure resistance.

Fig 4: Identifying Terminals -2- And -3- For Resistance Measurement

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Version 2:

Fig 5: Locking Flange Cover

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-- Disconnect the connector -3- on the right locking flange.

NOTE:

Ignore items -1, 2 and 4-.

-- Connect multimeter between terminals -1 and 2- to measure resistance.

Fig 6: Fuel Level Sensor Location

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Continuation for All Vehicles

The Fuel Level Sensor -G- is installed:

Sensor at lower stop: 863 to 960 Ω.
Sensor at upper stop: 67 to 86 Ω.

NOTE:

If measured value is 0 Ω there is a short circuit. If measured value is ∞ Ω there is and open circuit in the wiring.

To check resistance values "Tank full" or "Tank empty", the Fuel Level Sensor -G- must be removed and the floater on the sensor must move to the upper or lower end position, refer to Fuel Level Sensor -G-, REMOVING AND INSTALLING .

The following values are obtained when the Fuel Level Sensor -G- is removed because of the greater movement of the floater arm:

The Fuel Level Sensor -G- is removed:

Fig 7: Fuel Level Sensor Connector Terminal Identification

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-- Connect multimeter between terminals -1 and 2- to measure resistance.

Sensor at lower stop: approximately 990 Ω.
Sensor at upper stop: approximately 51 Ω.

Assemble in reverse order of disassembling. Note the following:

-- Install the right locking flange cover, refer to Figure.

-- Insert the frame into the floor covering, refer to the Parts Catalog and Interior Trim .

-- Install the right rear single seat in the second row of seats, refer to Seat Frames .