S6 Wagon L5-2226cc 2.22L DOHC Turbo (AAN) (1995)
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Check for continuity between terminal 2 of IAC valve harness connector and terminal 4 of Test Box.
If NO continuity:
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Repair short to GND or open circuit between terminal 2 of IAC valve harness connector and terminal 4 of ECM harness connector.
If NO open circuit or short to GND:
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Replace ECM.