A4 Cabriolet L4-1.8L Turbo (AMB) (2005)
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Disconnect hoses from Recirculating valve for turbocharger -N249- -1-; leave electrical connector connected.
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Location: under intake manifold
NOTE: The illustration shows a removed intake manifold viewed from below.
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Connect test hose to valve connection marked with arrow.
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Start Output Diagnostic Test Mode and actuate Recirculating valve for turbocharger -N249-.
Output Diagnostic Test Mode ->
Recirculating valve for turbocharger -N249
Indicated on display
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Valve must click...
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...and must open and close (can be checked by blowing into test hose).
If valve does not click:
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Check internal resistance of valve.
If valve does not open or close properly:
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Replace Recirculating valve for turbocharger -N249-.
Checking internal resistance
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Disconnect connector from Recirculating valve for turbocharger -N249- -1-.