S4 V8-4.2L (BHF) (2004)
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Disconnect electrical harness connector - arrow - at left locking flange.
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Connect hand multimeter V.A.G 1526 B between terminal - 2 - and - 3 - for resistance measurement.
NOTE:
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If measured value is 0 ohm. there is a short circuit. If measured value is Infinite Ohms there is and open circuit in the wiring.
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To check resistance values "tank full" or "tank empty", the Fuel Level Sensor 2 G169 must be removed and the floater of the sensor must be
placed in upper or lower end position.
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With Fuel Level Sensor 2 G169 removed, the following values are obtained because of the greater deflection of the floater arm: