vats simulator
I'm an electronics type and can build or fix darn near anything. Where can I get info?? 
Thread Starter
Melting Slicks
Joined: Feb 2006
Posts: 2,753
Likes: 15
From: backwoods upstate ny
been 20+ years since i've played with solid state design,need some help without doing the whole learning curve again.
vats 86-93 apparently puts 5v+ output from ecm to vats module, looks for 50 hz sink to enable ecm...i'm thinking (try to avoid that, makes my hair greyer) that a 555 ic set up as a 50 hz oscillator, output to an npn transistor (probably an 2n2222 or such) would fool the ecm into thinking a proper ignition key/vats module was in place...whole thing would cost about $4 raddyshack parts and fit easily in a matchbox.
i don't have an oscilloscope to check operation, maybe a loudspeaker if i can can still hear that low, or ???
vats 86-93 apparently puts 5v+ output from ecm to vats module, looks for 50 hz sink to enable ecm...i'm thinking (try to avoid that, makes my hair greyer) that a 555 ic set up as a 50 hz oscillator, output to an npn transistor (probably an 2n2222 or such) would fool the ecm into thinking a proper ignition key/vats module was in place...whole thing would cost about $4 raddyshack parts and fit easily in a matchbox.
i don't have an oscilloscope to check operation, maybe a loudspeaker if i can can still hear that low, or ???
Thread Starter
Melting Slicks
Joined: Feb 2006
Posts: 2,753
Likes: 15
From: backwoods upstate ny
my vats is working now,but i like to FIX things before they break...i think its a dumb thing anyway,bad guys have tow trucks...and i need a spare ign key and don't like the $35 ripoff at the dealer...and my bud is putting a tpi on his jeep and the junkyard wants him to buy the steering column/key/ vats module all together...and i just like to tinker,and its not a bother to me
Thread Starter
Melting Slicks
Joined: Feb 2006
Posts: 2,753
Likes: 15
From: backwoods upstate ny
did it...dumb old MECHANICAL engr with a soldering iron (me)...not just foolin the vats module with a resistor, this talks directly to the ecm.
ran 2 hrs last nite, breadboard circuit with hei dist on my ancient distrib machine....restarted this morn ok.
now the ''real'' version and a 100 hr test..for that i'm gonna send the bypass module a 3.0 v signal and see if it lives for 5 days...any comments from EE's ?
ran 2 hrs last nite, breadboard circuit with hei dist on my ancient distrib machine....restarted this morn ok.
now the ''real'' version and a 100 hr test..for that i'm gonna send the bypass module a 3.0 v signal and see if it lives for 5 days...any comments from EE's ?
