A4 V6-3.0L (AVK) (2004)
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Disconnect connector from LDP.
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Connect voltage tester VAG1527 B as follows:
Connector terminal
Measure
3
Engine Ground (GND)
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Briefly operate starter motor.
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LED must light up.
If LED does not light up:
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Check electrical wiring from terminal 3 via fuse for fuel pump relay for open circuit.
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Repair wiring as necessary.
If wiring is OK:
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Check fuel pump relay:
Checking output wiring (vehicles with mechanical throttle activator)