Fuel Level Sensor G , testing

WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2008 Audi S4, 2008 Audi RS 4, 2008 Audi A4, 2007 Audi S4, and 2007 Audi RS 4. However, it is still accessible from the selected car via links, so may be relevant.

Special tools, testers and auxiliary items required

Fig 1: Portable Multimeter V.A.G 1526C

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Portable multimeter V.A.G 1526 C

Fig 2: Identifying Connector Test Set V.A.G 1594 C

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connector test set V.A.G 1594 C

Test sequence

Sedan:

Remove carpeting in luggage compartment.
Fold forward right rear seat backrest, if necessary.

Wagon:

Remove left 1/3 backrest →
- 72 - SEAT - FRAMES
- 72 - SEAT - FRAMES for BODY INTERIOR - CABRIOLET
.
Remove left side luggage compartment trim and dirt tray →
- 70 - INTERIOR TRIM
- 70 - INTERIOR TRIM for BODY INTERIOR - CABRIOLET
.

All models:

Fig 3: Unbolting Cover For Locking Flange In Luggage Compartment

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove locking flange cover in luggage compartment - arrows -.

Fig 4: Identifying Locking Flange Electrical Harness Connectors

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect electrical harness connector - 1 - at locking flange.

NOTE:

Ignore - 2 -.

Fig 5: Connecting Hand Multimeter V.A.G 1526 B Between Terminal For Resistance Measurement

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect hand multimeter V.A.G 1526 B between terminal - 2 - and - 3 - for resistance measurement.

Sensor installed	Sensor at lower stop	Sensor at upper stop
Fuel Level Sensor G	300 to 310 Ω	53.5 to 59 Ω

NOTE:

If measured value is 0 Ω there is a short circuit. If measured value is ∞ Ω there is and open circuit in the wiring.
To check resistance values "tank full" or "tank empty" , the fuel delivery unit must be removed → Fuel delivery unit, removing and installing and the floater of the sensor must be placed in upper or lower end position.
With fuel level sensor G removed, the following values are obtained because of the greater deflection of the floater arm:

Sensor removed	Sensor at lower stop	Sensor at upper stop
Fuel Level Sensor G	271 to 296 Ω	55 to 69 Ω