S4 V8-4.2L (BHF) (2004)
Test conditions
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Ignition switched on.
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Vehicle Diagnostic, Testing and Information System VAS 5051 A connected, On-board diagnostics and vehicle system "01 Engine electronics"
selected.
Check activation
Display on VAS 5051 A:
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In selection - 1 -, click on diagnostic function "03. Output Diagnostic Test Mode (DTM)".
Display on VAS 5051 A:
A. Output diagnostic test mode waiting, Advancing by switching required
1. Evaporative Emission (EVAP) Canister Purge Regulator Valve N80
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Press -> button repeatedly until leak detection pump for fuel system is activated
NOTE: Operating noise of Leak Detection Pump (LDP) is audible at left rear wheelhousing.
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End function "03. output Diagnostic Test Mode (DTM)" by pressing button.