Fuel Level Sensor 2 -G169-, CHECKING

WARNING: This page is about a different variant/trim than selected.

Special tools and workshop equipment required

Multimeter VAG 1526D
Connector Test Set VAG 1594C

Procedure

Fig 1: Cut Floor Covering Along Perforation

Courtesy of AUDI OF AMERICA, LLC

-- Remove 2nd row left seat cushion. Refer to SEAT CUSHION, REMOVING AND INSTALLING .

WARNING:

Risk of injury.

Wear safety gloves.

-- Cut the floor covering along the perforation -arrows- on the left side with a carpet knife -1-.

-- Fold the floor covering to the side in the -direction of arrow-.

Fig 2: Identifying Locking Flange Cover - Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Remove nuts -1 to 4- and remove left locking flange cover.

-- Disconnect electrical harness connector -1- at left locking flange.

Fig 3: Identifying Electrical Harness Connector -1- And Vent Line -2-

Courtesy of AUDI OF AMERICA, LLC

NOTE:

Ignore -2-.

-- Connect multimeter between terminals -2 and 3- to measure resistance.

Fig 4: Identifying Terminals -2 And 3- To Measure Resistance With Multimeter

Courtesy of AUDI OF AMERICA, LLC

With the Fuel Level Sensor 2 -G169- installed:

Sensor at lower stop: 760 to 842 Ω.
Sensor at upper stop: 67 to 86 Ω.

NOTE:

If measured value is 0 Ω there is a short circuit. If measured value is ∞ there is and open circuit in the wiring.

To check resistance values "tank full" or "tank empty", the fuel level sensor 2 must be removed and the sensor floater must be placed in upper or lower end position. Refer to Fuel Level Sensor 2 -G169- .

With fuel level sensor 2 removed, the following values are obtained because of the greater deflection of the floater arm:

With the Fuel Level Sensor 2 -G169- removed:

Sensor at lower stop: Approximately 990 Ω.
Sensor at upper stop: Approximately 51 Ω.

Assemble in reverse order of disassembling. Note the following:

-- Install locking flange cover.

-- Install the frame into the floor covering. Refer to FRONT FLOOR COVERING, REMOVING AND INSTALLING .

-- Install 2nd row left seat cushion. Refer to SEAT CUSHION, REMOVING AND INSTALLING .