A6 Quattro Sedan V6-2.8L (AHA) (1998)
Fuel Gauge Sender: All Technical Service Bulletins
Sending Units, Checking
Test Requirements
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Fuel tank full of fuel
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Observe all safety precautions --> Group 20 of appropriate Repair Manual.
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Observe rules of cleanliness --> Group 20 of appropriate Repair Manual.
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Always complete checking procedure (check all 3 sending units).
Starting with tank full:
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Check fuel gauge sending units as described on pages 5-7.
After checking fuel gauge sending units with full tank. Drain fuel tank as follows:
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Remove fuse 28 from relay panel (left-row, fifth large fuse from top).
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Start and run engine until engine runs out of fuel (relieves pressure in fuel system).
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Switch ignition OFF.
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Remove fuel supply hose from sending unit -0- and connect to VAG 1433A fuel cart or similar approved equipment.
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Connect VAG1348/3A remote switch with VAG1348/32 adapter to cavity for fuse 28 (arrow).
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Connect test probe to Battery Positive Voltage (B+).
With remote switch connected: