Quote:
Originally Posted by chiplee
Code reader at autozone said VSS
Vehicle speed sensor caused by
1. loose connection
2. Bad ground
3. Bad VSS
Is there a VSS fuse? lol
I'm having a little trouble convincing myself my tampering with the NAV speed pulse input didn't do this.
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If you fed the SPG signal back into the vehicle ECU then this could cause a problem with the VSS. Several people made this mistake when wiring up the device or the switch. Make sure the factory speed pulse is disconnected from the NAV and the SPG pulse goes directly into the back of the NAV unit.
Also, make sure you tapped into the speed sensor wire directly behind the NAV unit. On some vehicles the speed sensor also feeds other devices like your audio system, dashboard computer, etc. so if you tap into the speed wire somewhere else then you could be feeding the bogus speed pulse to multiple devices which could cause some problems.
Also, if you removed the SPG and your problem still remains then I don't see how it could be caused by the SPG, unless maybe you fed enough voltage or current back into the VSS circuit to burn it out. If you want to send me your wiring diagram and some photos of your wiring for the switch and SPG then I might be able to help you further. There are nearly 100 of these units in use for all sorts of 2004-2008 vehicles and nobody reported any problems like this so I can't imagine what else it could be other than a wiring issue.