fuel AUDI A8 1998 D2 / 1.G AHA Engine Auxiliary Signals Checking Workshop Manual

24-176

Fuel level signal, checking


Notes:

If there is too little fuel in the fuel reservoir (less
than 2 gallons) combustion misfiring and/or fuel
system malfunctions could occur. In this case
the malfunction "Fuel level too low" is stored in
the DTC memory (SAE P1250 / VAG 17658).
This malfunction always occurs with
combustion misfiring or fuel system
malfunctions.
In general eliminate all other malfunctions
first.

- Fill fuel tank of vehicle (at least 20 ltr, or 5.25
gal).

- Check and then erase DTC memory page 01
-
16
.

- Check readiness code page 01
-70
.

- Generate new readiness code page 01
-73
.
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24-177

- Conduct a test drive ( Safety precautions
page 24
-9 ).

- Check DTC memory of ECM page 01
-16
.
If only the DTC "Fuel level too low" (SAE P1250 /
VAG 17658) is stored in the DTC memory.

Electrical Wiring Diagrams, Troubleshooting & Component Locations
binder - Connect VAG1598/22 test box to ECM harness connector page 01
-
67
.
- Check wire from terminal 21 of test box to instrument cluster for open
circuit or short circuit per wiring diagram.
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