Question about 2003 Volkswagen Volkswagen Jetta
You need to have the electronic engine control computer scanned for fault codes. This is the very 1st thing that must be done when a problem occurs like this one.
Posted on Feb 20, 2012
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Posted on Jan 02, 2017
SOURCE: vw transporter t4
Hi, Had the same problem, just found the fault,it was a brcken wire causing relay109 to drop out. It was in the upper of the two harnesses on the bulkhead above the air filter, if you pull back the outer sleave and check the thin black/white wire for a break I think you will find your problem. You should have 12v between it and positive. Good luck.
Posted on Aug 25, 2009
To check the vacum pump.all you have to do is remove the pipe from the servo,and with the engine running that pipe should be sucking.place finger over the pipe and check.If its not sucking then check the pipe for cracks.If the pipe is ok then replace the pump
Posted on Nov 09, 2009
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