A6 Quattro Sedan V8-4.2L (BVJ) (2007)
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Check voltage supply for Fuel Pump (FP) (from Fuel Pump (FP) Control Module J538)
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Remove rear seat bench.
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Unbolt cover for right locking flange - arrows -.
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For voltage testing, connect the hand multimeter V.A.G 1526C with measuring probes and connector adapters from the connector test set V.A.G
1594C between clamp -1 -and - 5 -, as shown in the illustration. The electrical connection remains connected.
NOTE: Connector sockets are numbered respectively on the rear side of the connector.
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Start engine.
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Specified value at start and in idle: 4 to 5 V.
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Depress accelerator pedal completely and then release it (brief throttle burst).
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Specified value: The voltage value must first rise slightly, then fall and then rise again to the value previously read.
If the reading does not result as described:
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Check voltage supply and activation of Fuel Pump (FP) Control Module J538.
Check voltage supply for Fuel Pump (FP) Control Module J538
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Remove Fuel Pump (FP) Control Module J538.
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Disconnect electrical harness connector - arrow - on Fuel Pump (FP) Control Module J538.
