Touareg V6-3.2L (BMX) (2005)
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After the pressure has stabilized, set valve - D - to " Hold".
‹› The pressure must not drop below 20 mbar (8 in. H2O) after 5 minutes.
If no pressure decrease can be determined, end diagnostic mode 8 and check Leak Detection Pump (LDP) (V144) pressure buildup --> [ Leak
Detection Pump, Checking Pressure Build-Up ] See: Leak Detection Pump, Checking Pressure Build-Up.
If pressure does not build up or if positive pressure is not maintained for at least 5 minutes, locate leak as follows:
Allow engine to continue running in idle with diagnostic mode 8 activated.
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First check evaporative emission (EVAP) canister purge regulator valve (N80) for leaks. Clamp off hose to evaporative emission (EVAP) canister
purge regulator valve (N80) with hose clamp - arrow -.
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Repeat pressure test by resetting valve - D - to " Test".
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Observe pressure gauge and flow meter. If the flow quantity decreases and the pressure climbs to 25 mbar (10 in. H2O), the fuel system is full.
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After the pressure has stabilized, set valve - D - to " Hold".