A4 Sedan L4-2.0L Turbo (BPG) (2005)
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Air Bypass Valve Solenoid: Testing and Inspection
Turbocharger Recirculating Valve N249, Checking
Special tools, testers and auxiliary items required
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Multimeter V.A.G 1526 or equivalent.
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Test Box 105 Pin VAG1598/42.
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Adapter Lead Vag1598/39 VAG1598/39.
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Adapter cable V.A.G 1598/39-1.
NOTE: Use only gold-plated terminals when servicing terminals in harness connector of Charge Air Pressure Sensor G31.
Test requirements
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Fuses for the Engine Control Module (ECM) J623 OK.
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Battery voltage at least 12.5 volts.
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All electrical consumers such as, lights and rear window defroster, switched off.
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On vehicles with automatic transmission, selector lever in position "P" or "N".
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A/C switched off.
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Ground (GND) connections between engine/transmission/chassis OK.
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Ignition switched off.
Test sequence
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Remove engine cover - arrows - .
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Disconnect the electrical harness connector - 3 - from the Turbocharger Recirculating Valve N249.
