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Old November 26th, 2008, 07:04   #1
k_harley's Avatar
Join Date: Oct 2006
Location: Lowell, MA
Default 1999.5 Jetta Stalling, no start - 18008 Power Supply Terminal 15: Voltage too Low

So I have this 99.5 Jetta that ocasionally stalls without warning, just boom, its off. Ive only seen it happen while idling. Once it stalls, will not start unless I put power directly to the n109 fuel shutoff valve.

The only code that could be relevant to the stalling that is present is this-

18008 Power Supply Terminal 15: Voltage too Low

I looked through the bentley and found that Terminal 15 is "Swithced Positive Voltage B+ from ignition / starter switch"

Im definitly leaning towards replacing the ign swtich, but thought Id consult with the community first. ;-)

Already tried a new 109 and made no change.

Also, dont know if this is realated, but the radio keeps going on and off on its own.

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Last edited by k_harley; November 26th, 2008 at 07:08.
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Old November 26th, 2008, 08:37   #2
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Join Date: May 2004
Location: Humboldt Co CA
Fuel Economy: A4 = wife drives it, don't know

I'd start with a thorough cleaning of the grounds. Ignition switch is possible, but rooting around getting to the grounds might also allow you to find something else not quite connected.

Sure the 109 is good? The gp light comes on as expected?
Whitedog's in progress no-start link. http://forums.tdiclub.com/showthread.php?t=199398
Read all about it!
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Old November 26th, 2008, 09:15   #3
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Join Date: Sep 2004
Location: Lakeville, MN
Fuel Economy: 63/47/41 - Best/Avg/Worst


I have a 99.5 as well and just replaced my battery with an OEM. While the old battery was out I loosened and cleaned all the grounds thoroughly. Couldn't believe how bad these connections were. But I guess 9 years of Minnesota winters and all the salt on the roads I should have expected it.

There has been a noticeable increase in how fast the starter turns the motor over.
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