Volkswagen Golf 1999 Service Manual page 4138

Instrument cluster through m.y. 1999, On Board Diagnostic (OBD)
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Next&type=repair&id=...
Fuel gauge, checking
If the fuel gauge displays the contents of the fuel
tanks as being too high or too low, the fuel gauge
needle position can be corrected (adapted).
First perform the following procedures:
- Perform Output Diagnostic Test Mode (DTM) for
instrument cluster
If Output Diagnostic Test Mode (DTM) does not
recognize a malfunction, check function of
sender for fuel gauge -G-:
- Check resistance value of sender for fuel gauge
in read measuring value block, display group
002 Page 01-33
If Read Measuring Value Block does not indicate
a short or open circuit in the wiring or the fuel
gauge sender, continue with adaptation
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13/2/2005