Fuel Level Sensor - G-, Checking, Vehicles With All Wheel Drive AWD

WARNING: This page is about a different car, the 2015 Audi A3. 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 Set:VAG1594D
Trim Removal Wedge:3409

PROCEDURE

-- Move the front seats all the way forward.

-- Turn off the ignition.

-- Remove the rear bench seat. Refer to BENCH SEAT/SINGLE SEAT, REMOVING AND INSTALLING .

Fig 1: Rear/Bench Seats

Courtesy of AUDI OF AMERICA, LLC

-- Unclip the right locking flange cover -1- at the tabs -arrows- using the Trim Removal Wedge:3409 .

Fig 2: Fuel Pump Cover (Under Rear/Bench Seats)

Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector -2- from the locking flange.

Fig 3: Top View Of Fuel Pump

Courtesy of AUDI OF AMERICA, LLC

NOTE:

Ignore items -1 and 3-.

The Fuel Level Sensor -G- Is Installed:

Fig 4: Measuring Resistance Between Contacts -1 And 2-

Courtesy of AUDI OF AMERICA, LLC

NOTE:

The fuel tank must be filled completely in order to have an exact reading of the resistance on the "Fuel tank full" when it is installed. Drive at least 500 meters after filling the fuel tank full to get rid of any bubbles in the fuel tank. Then fill the fuel tank again.

-- Connect the multimeter for resistance measurements shown in the table.

Measurement at contact	Tank empty	Tank full
1 + 2	261 to 303 Ω	78 to 80 Ω
1 + 3	37 to 79 Ω	260 to 262 Ω
2 + 3 ¹⁾	335 to 345 Ω	335 to 345 Ω
¹⁾ Arbitrary sensor position

The Fuel Level Sensor -G- is removed:

Fig 5: Measuring Resistance Between Contacts -1 And 2-

Courtesy of AUDI OF AMERICA, LLC

NOTE:

To check resistance values "tank full" or "tank empty", the fuel delivery unit must be removed and the sensor floater must be moved in upper or lower end position.

With the fuel delivery unit removed, the following values are obtained because of the greater deflection of the floater arm:

-- Connect the multimeter for resistance measurements shown in the table.

Measurement at contact	Tank empty	Tank full
1 + 2	297 to 303 Ω	78 to 80 Ω
1 + 3	37 to 45 Ω	254 to 262 Ω
2 + 3 ¹⁾	335 to 345 Ω	335 to 345 Ω
¹⁾ Arbitrary sensor position

The Fuel Level Sensor -G- is faulty when the following is detected:

Large deviations in measured values
Measured value 0 Ω (short circuit).
Measured value ∞ Ω (open circuit).
No fault in the electric wires.

-- Install the fuel delivery unit/Fuel Level Sensor -G-. Refer to FUEL DELIVERY UNIT/FUEL LEVEL SENSOR, REMOVING AND INSTALLING .