Allroad Quattro V6-2.7L Turbo (APB) (2002)
for this.
If a malfunction relating to the recirculating valve for turbocharger -N249- is displayed:
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Disconnect hoses from valve; harness connector remains connected.
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Attach assisting hose to one connection of valve.
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Initiate output Diagnostic Test Mode (DTM) and activate recirculating valve for turbocharger -N249-.
Indicated on display
Valve must click...
and must open and close (can be tested by blowing into assisting hose).
If valve does not click:
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Check internal resistance of valve.
If valve does not open and close properly:
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Replace recirculating valve for turbocharger -N249-.
Checking internal resistance
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Disconnect connector at valve.
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Connect multimeter at valve for resistance measurement.
^
Specified value: 27 ... 30 Ohms
If specified value is not obtained:
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Replace recirculating valve for turbocharger -N249-.
If the specified value is met:
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Check voltage supply.
Checking voltage supply
Note: Voltage is supplied to the recirculation valve via the Fuel Pump (FP) relay.
Test requirement:
Fuse for recirculation valve OK
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Disconnect connector at valve.