Test sequence

If a malfunction of the sender for fuel gauge is detected at instrument cluster, check if the signal at the instrument cluster is OK.

• Read measuring value block display group 002.

  See MEASURING VALUE BLOCK 002 .

• Check indication in display field -2-.
Fig 1: Scan Tool Display - Signal From Sender For Fuel Gauge
Courtesy of AUDI OF AMERICA, INC.

If the fuel supply is indicated, instrument cluster is malfunctioning.

• Replace instrument cluster. See INSTRUMENT CLUSTER, REMOVING AND INSTALLING  .

If the fuel supply is not indicated:

• Check signal at multi-pin harness connector at instrument cluster.
• Remove instrument cluster. See INSTRUMENT CLUSTER, REMOVING AND INSTALLING  .
• Connect VAG 1598A test box to blue 32-pin multi-pin harness connector using VAG 1598/25 adapter.
• Connect multimeter between terminal 5 and 7 (sensor Ground (GND)) for resistance measurement.
  • Specification: between approx. 70 ohm (tank empty) and approx. 270 ohm (tank full)

If specified value is not obtained:

• Check wire connection between instrument cluster and sender for fuel gauge according to wiring diagram.

If no malfunctions are found in wires:

• Check sender for fuel gauge.

  See SENDER FOR FUEL GAUGE, CHECKING .

If specified value is obtained:

• Replace instrument cluster. See INSTRUMENT CLUSTER, REMOVING AND INSTALLING  .