A4 Sedan L4-1.8L Turbo (AWM) (2001)
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Connect VAG1527B voltage tester as follows:
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Switch ignition on.
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LED must light up.
If LED does not light up:
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Check wire connection from terminal 1 of connector to fuse for open circuit:
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Repair open circuit if necessary.
If LED lights up:
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Checking activation.
Checking activation
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Connect VAG1598/31 test box at wiring harness to Engine Control Module (ECM), do not connect ECM. Refer to "Scan Tool Testing/Wire and
Component Testing Using VAG1598/31 Test Box" See: Testing and Inspection
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Check the following wire connection for open circuit and short circuit to Ground (GND) and B+:
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Repair open circuit or short circuit if necessary.