Fuel Level Sensor 4, Checking

WARNING: This page is about a different car, the 2006 Audi A8, 2005 Audi A8, and 2004 Audi A8. However, it is still accessible from the selected car via links, so may be relevant.

Special tools, testers and auxiliary items required

Fig 1: Special Tool - Multimeter V.A.G 1526 A

GW00000419

Courtesy of VOLKSWAGEN UNITED STATES, INC.

VAG1526A

Fig 2: Identifying V.A.G 1594 A Adapter Set

GW00000156

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Engine/transmission hoist VAG1594A

Test Sequence

Remove luggage compartment floor lining.

Fig 3: Removing/Installing Cover For Right Locking Flange

GW00028637

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove cover for right connector flange (- arrows -).

Fig 4: Disconnecting/Connecting Electrical Connectors At Right Locking Flange

GW00028638

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Carefully release and disconnect electrical harness connector - 2 - on right connector flange.

Fig 5: Connecting Multimeter Between Terminal Of Connector For Resistance Measurement

GW00028692

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect multimeter between terminal 2 and 3 on connector - A - for resistance measurement.

Sender removed	Sender at lower stop	Sender at upper stop
Fuel Level Sensor 4 G393	approx. 155Ω	approx. 70Ω

For measured value 0 Ω there is a short circuit, for measured value ∞ Ω an open circuit.

NOTE:

To check resistance values "tank full" or "tank empty" , Fuel Supply Sensor 4 G393 must be removed → Fuel Level Sensor 4, Removing and Installing and the sensor floater must be placed in upper or lower end position.