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Fuel Level Sensor, Connector Assignment

Procedure 

Fig 1: Identifying Retaining Tabs For Sealing Flange Cover
GWWA20-1066Courtesy of AUDI OF AMERICA, LLC

The fuel level sensor -G- is located under the right side of the rear seat bench.

-- Remove rear seat bench. Refer to Removal and Installation .

-- Unclip right locking flange cover retaining tabs -arrows-.

-- Carefully release and disconnect the connector -arrow- on the connector flange.

Fig 2: Identifying Fuel Delivery Unit Connector
GWWA20-1067Courtesy of AUDI OF AMERICA, LLC

Terminal assignment of the 5-pin harness connector at fuel level sensor - vehicles through approximately 11.04 

Fig 3: Connecting Multimeter Between Terminal Of Harness Connector For Voltage Measurement
GWWA28-0020Courtesy of AUDI OF AMERICA, LLC
  1. Transfer fuel pump -G6- switched positive
  2. Fuel level sensor ground (sensor ground)
  3. Wire connection from fuel level sensor to instrument cluster (fuel gauge)
  4. Not used
  5. Transfer fuel pump ground

Terminal assignment of the 5-pin harness connector at fuel level sensor - vehicles from approximately 11.04 

Fig 4: Connecting Multimeter Between Terminal Of Harness Connector For Voltage Measurement
GWWA28-0020Courtesy of AUDI OF AMERICA, LLC
  1. Transfer fuel pump switched positive
  2. Fuel level sensor ground (sensor ground)
  3. Wire connection from fuel level sensor to instrument cluster (fuel gauge)
  4. Tank sensor total resistance
  5. Transfer fuel pump ground

FSI/TFSI engines 

Fig 5: Identifying Fuel Pump (FP) Control Module
GWWA20-1145Courtesy of AUDI OF AMERICA, LLC
NOTE:

On vehicles with FSI/TFSI engines, the fuel level signal travels from the fuel level sensor through the fuel pump control module.

The fuel pump control module is located under the rear seat bench on the right side under the cover for the connector flange.