A6 Quattro Sedan V6-2.8L (AHA) (1998)
If the relay doesn't engage:
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Switch ignition off.
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Remove fuel pump relay from its socket in relay panel.
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Connect multimeter US 1119 (Fluke 83 or equivalent) to terminal 19 of relay panel socket and ground.
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Switch ignition on.
Specified value: battery voltage
If the specified value is not obtained:
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Repair wiring using applicable wiring diagram.
If the specified value is obtained:
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Switch ignition off.
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Connect multimeter US 1119 (Fluke 83 or equivalent) to socket terminal 16 of relay position 4 in relay panel and VAG 1598/22 test box socket 4.
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Check wiring for open circuit or short circuit to B+ or Ground.
If wiring is OK:
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Replace fuel pump relay -J17-.
Checking actuation of fuel pump and components