leon, you are correct it should be 12V. Checked the forum and found this discussion.
http://www.peachparts.com/shopforum/showthread.php?threadid=40432&highlight=idle+valve+voltage
Unfortunately, not sure why this would occur.
m

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Martin Ingram
Colorado Springs
2005 320 CDI
2006.5 VW Jetta TDI
1991 560SEL (179000 Sold)
1972 280SEL 4.5 ('The Lead Sled' 320000 miles when sold.)
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