Volkswagen Golf, GTI, Jetta 1999-2004, Jetta Wagon 2001-2004 - 1.8 Liter 4-Cyl. 5V Turbo Engine Mechanical, Engine Code(s): AWD, AWW, AWP
The diagnosis operates by pressurizing the system and
should detect leaks where the damage exceeds 1 mm in
diameter.
During the diagnosis the Leak Detection Pump (LDP) -
V144- builds up a pressure of approx. 30 mbar in the
evaporative emissions system. The pump will switch off
when the pressure is attained. When the pressure falls
to below a certain figure, the pump will switch on again.
The On Board Diagnostic (OBD) monitors the time
between the switched on periods and if it is too short it
will register a code in the DTC memory.
http://127.0.0.1:8080/vw/servlet/ESIS?action=Goto&type=repair&id=VW.A4.GE04.20.3 (4 of 43)5/11/2006 11:17:48 AM
