A8L V8-4.2L (BFM) (2004)
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Fuel pump relay OK
Note: The valves for camshaft adjustment receive their power supply via the fuel pump relay.
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Connect voltage tester V.A.G 1527 B as follows:
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Operate starter briefly.
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LED should light up.
If the LED does not light up:
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Check for open circuit in wiring connection between fuel pump relay and contact 1 on connector via fuse (refer to wiring diagram).
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Repair open circuit in wiring (refer to wiring diagram).
If the LED lights up:
Checking activation
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Connect voltage tester V.A.G 1527 B to contact 1 (positive) and contact 2 of the connector.
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Vehicle diagnostic, testing and information system VAS 5051 is connected; vehicle system "01 - Engine electronics" is selected. Ignition must
be switched on.