Audi Workshop Service and Repair Manuals > A4 Mk1 > Vehicle electrics | Electrical system | Instruments, GCI | Instrument cluster - vehicles from model year 2000

Checking signal from fuel gauge senderG

Checking signal from fuel gauge sender -G-

If there is a fault with fuel gauge sender on instrument cluster, check whether signal is present at instrument cluster.

Special tools and workshop equipment required

t	Hand-held multimeter -V.A.G 1526C-

t	Auxiliary measuring set -V.A.G 1594C-

t	Test box -V.A.G 1598A-

t	Adapter -V.A.G 1598/25-

t	Vehicle diagnostic, testing and information system -VAS 5051B- with diagnostic lead -VAS 5051/5A-

Procedure

l	Vehicle diagnostic, testing and information system -VAS 5051B- with diagnosis lead -VAS 5051/5A- connected, vehicle self-diagnosis and vehicle system “17 - instrument cluster” selected → Electrical system, self-diagnosis; Rep. Gr.01.

Display on -VAS 5051-:

–	Select function “08 - Reading measured value block” from list -1-.

Display on -VAS 5051-:

–	Use keypad -2- to enter 2 for “display group 002” and confirm by touching Q key.

1 -	Enter display group

Display on -VAS 5051-:

–	Check readout in display zone -2-.

l	Specification: approx. fuel level

If the fuel level is indicated, but not displayed on fuel gauge -G1-, the instrument cluster is defective.

–	Renew instrument cluster → Chapter.

If the fuel level is not indicated:

–	Remove instrument cluster → Chapter.

–	Connect test box -V.A.G 1598A- with adapter -V.A.G 1598/25- to multi-pin connector, 32-pin, blue.

–	Connect multimeter to measure resistance between sockets “5” and “7”.

l	Specification: → Rep. Gr.20.

If reading does not match specification:

–	Check wiring connection between instrument cluster and fuel gauge sender according to current flow diagram.

If no fault is found in wiring:

–	Check fuel gauge sender -G- → Rep. Gr.20.

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