A4 Sedan L4-1.8L Turbo (AEB) (1997)
Fuel Pump Relay: Testing and Inspection
Fuel Pump Relay And Connections, Checking
The fuel pump relay is located at relay position 4 on the relay panel on the left side under the instrument panel.
Checking function of fuel pump relay -J17-
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Remove storage shelf in left-front footwell.
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Remove fuses 28, 29 and 34 from fuse panel.
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Connect VAG 1527B LED voltage tester between Ground and one of the two terminals for fuse 28.
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Briefly crank starter.
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LED test light must light up.
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Fuel pump relay must be actuated (sound and vibration)
If the fuel pump does not respond:
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Check power supply wiring.
If the LED test light does not light up:
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Repeat test at other terminal of fuse 28.