S4 V8-4.2L (BHF) (2004)
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Connect V.A.G 1527B voltage tester as follows.
Harness connector Terminal
Measure to
1
Engine Ground (GND)
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Operate starter briefly.
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LED must light up.
If LED does not light up:
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Check wire connection from harness connector terminal 1 to Fuel Pump (FP) Relay -J17- via fuse for open circuit according to wiring diagram.
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Specified value: Wire resistance max 1.5 Ohms
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If necessary, repair wire connection.
If LED lights up:
Checking control wire
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Connect test box to wiring harness of Engine Control Module (ECM), ECM is not connected.
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Check the following wire connection for open circuit according to wiring diagram.
Harness connector Terminal
Test box Socket
2
44
Specified value: Wire resistance max 1.5 Ohms
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Check the wire for short circuit to B+ and Ground (GND).
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Specified value: Infinite Ohms (no continuity)
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If necessary, repair wire connection.
If no malfunctions are found in wire:
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Replace Engine Control Module (ECM).
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Install lock carrier with attachments.