gm passkey wiring

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instigator

Post subject: gm passkey wiring

Posted: Tue May 06, 2008 8:11 am

Joined: Mon Jan 28, 2008 8:43 pm
Posts: 475
Location: Missouri RAYTOWN

anyone know how to get around the vats system on the gm ecu? thanks

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RailHomie

Post subject: Re: gm passkey wiring

Posted: Tue May 06, 2008 1:20 pm

Joined: Wed Apr 18, 2007 9:54 am
Posts: 298
Location: Louisville, KY

I had to do this on mine. You have to have a small circuit that sends a square-wave (30Hz, I think) signal constantly to the ECM to let it run. Check this site out: http://mysite.verizon.net/vze7erz1/id14.html
And I got this schematic from FieroAddiction.com:

Read up on it a bit though. Depending on what year you have I think one of the resistors needs to be different.
Good luck!

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instigator

Post subject: Re: gm passkey wiring

Posted: Tue May 06, 2008 6:25 pm

Joined: Mon Jan 28, 2008 8:43 pm
Posts: 475
Location: Missouri RAYTOWN

anyone use one of these for the passkey http://cgi.ebay.com/ebaymotors/GM-VATS- ... 247141833&

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