Fuel Level Sensor 2 - G169-, Checking: Procedure

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.

-- 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

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-- Unclip the cover -1- off the left locking flange using Trim Removal Wedge:3409 -arrows-.

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-- Release the connector safety catch and disconnect the connector -2- on the left locking flange.

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NOTE:

Ignore -items 1 and 3-.

Fuel Level Sensor 2 -G169- Is Installed:

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

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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	275 to 303 Ω	51 to 71 Ω
1 + 3	44 to 70 Ω	269 to 289 Ω
2 + 3 ¹⁾	335 to 345 Ω	335 to 345 Ω
¹⁾ Arbitrary sensor position

Fuel Level Sensor 2 -G169- is removed:

Fig 3: Measuring Resistance Between Contacts -1 And 2-

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NOTE:

To check resistance values "tank full" or "tank empty", the fuel level sensor must be removed and the sensor floater must be moved to the upper or lower stop.

With fuel level sensor 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	51 to 53 Ω
1 + 3	37 to 43 Ω	287 to 289 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 Fuel Level Sensor 2 -G169-. Refer to FUEL LEVEL SENSOR 2 - G169-, REMOVING AND INSTALLING .