Yet another VATS problem.....
Thread Starter
TECH Enthusiast
Joined: Apr 2009
Posts: 592
Likes: 238
From: Lewisville, TX
Yet another VATS problem..... Im about to shove a rag in the gas tank of this car and blow the SOB up.
Last year I had an issue with a gremlin in the VATS system which caused a MAJOR inconvenience at the worst times possible. And when wasnt starting there was no signs of anything "wrong". The accessories would all come on. The transmission would unlock. The fuel pump would turn on. But still, no start. So far I have...
1. Replaced Battery
2. Replaced Alternator
3. Bypassed VATS w/ Resistor
4. Replaced BCM and PCM
5. Replaced Starter
Since replacing the starter I have had 0 issues with it for about a year. Last week it started doing it again, however this time, the security light and "service engine soon" light come on solid and stay on. Its been intermittent until tonight. All day today, no start. I took apart my VATS bypass out to check the wires and found one of the connections to be a bit loose. So I rebuilt the bypass harness and reinstalled. Tried to start the car, no change. Ive taken the starter, alternator, and battery out and had them all tested. They all show good. Im completely stumped as to where to go next, anyone have any suggestions?
Last year I had an issue with a gremlin in the VATS system which caused a MAJOR inconvenience at the worst times possible. And when wasnt starting there was no signs of anything "wrong". The accessories would all come on. The transmission would unlock. The fuel pump would turn on. But still, no start. So far I have...
1. Replaced Battery
2. Replaced Alternator
3. Bypassed VATS w/ Resistor
4. Replaced BCM and PCM
5. Replaced Starter
Since replacing the starter I have had 0 issues with it for about a year. Last week it started doing it again, however this time, the security light and "service engine soon" light come on solid and stay on. Its been intermittent until tonight. All day today, no start. I took apart my VATS bypass out to check the wires and found one of the connections to be a bit loose. So I rebuilt the bypass harness and reinstalled. Tried to start the car, no change. Ive taken the starter, alternator, and battery out and had them all tested. They all show good. Im completely stumped as to where to go next, anyone have any suggestions?
The vats by pass is sent a 5 volt reference one one wire.
The other wire is back to the BCM a lower voltage depending on needed resistors.
Check those 2 white wires @ the main underdash connector. 1 is 5v other something over 1 volt. that can confirm you have continuity thru the by pass & the voltage is getting thru.
Thats a start.
The other wire is back to the BCM a lower voltage depending on needed resistors.
Check those 2 white wires @ the main underdash connector. 1 is 5v other something over 1 volt. that can confirm you have continuity thru the by pass & the voltage is getting thru.
Thats a start.
Thread Starter
TECH Enthusiast
Joined: Apr 2009
Posts: 592
Likes: 238
From: Lewisville, TX
Nothing at all, the accessories come on, trans unlocks, fuel pump turns on, then nothing. It started last night and this morning so perhaps my VATS bypass wire was the problem. We'll see how long it lasts this time.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
