S4 Quattro Wagon V8-4.2L (BHF) (2008)
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A Output diagnostic test mode waiting, Advancing by switching required
1
Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80)
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Press the -> button repeatedly, until leak detection pump for fuel system is activated.
‹› LED must blink.
If LED does not blink:
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End function "005 - output Diagnostic Test Mode (DTM)" by pressing <- button.
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Select diagnostic function "022 - End output" in selection.
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Switch off ignition.
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Connect Test Box (V.A.G 1598/42) to wiring harness with Adapter Cable (V.A.G 1598/39-1) or Adapter Cable (V.A.G 1598/39-2). Clamp test
box Ground (GND) clip to battery negative terminal. The procedure will indicate whether the engine control module is to be connected to the test
box or not.
CAUTION!
To avoid damaging electronic components, switch to the corresponding measuring range and observe all test conditions before connecting
the test leads.
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Check the following wire connection for open circuit and short circuit to Ground (GND) and B+:
