Audi Workshop Service and Repair Manuals

Note:

Testing signal from fuel gauge sender:

=> Electrical system; Repair group 90; Servicing dash panel insert; Identification of contacts on connectors

Special tools, testers and auxiliary items

• ◆ Hand multimeter V.A.G 1526 or V.A.G 1526 A
• ◆ Adapter set V.A.G 1594 A

• ‒ Detach trim in luggage compartment.
• ‒ Unbolt cover for flange on fuel tank under floor trim in luggage compartment.
• ‒ → Release and unplug 4-pin connector -1-.

• ‒ → Measure resistance at contacts -2- and -3- on flange:

According to the amount of fuel in the tank, the resistance should be somewhere between the specified values for "tank full" and "tank empty".

• ‒ If the resistance is 0 ωor ∞ ω, this means there is a short circuit or an open circuit in the wiring in the tank.

Note:

In order to test the maximum and minimum values for "tank full" and "tank empty", remove the fuel gauge sender -G and move the float all the way to its top or bottom position.