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Old 09-27-2020, 09:42 AM   #1
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VAT System

97 Firebird .V6 Car won't start. Tried resetting VAT by the 10 minute method but the security light never stops blinking. Could it be the BCM? Should I do the VAT bypass? Thanks.
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Old 09-27-2020, 10:08 AM   #2
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What Started it? And it's VATS, Not VAT..... Vehicle Anti-Theft System. No, it's not the BCM. Do you still have the original ignition key? If so, Is the VATS Chip warn? You can try a VATS bypass. If you do I recommend installing an aftermarket security system.
The chip in the key is a resistor. It can be 1 of 15 values. You will need to measure the resistance of the chip in the key, if it's the original key. This will tell you what OHMS value you need for the bypass. Once you know this do a search on ebay and get a premade one, plug and play. It's a little more $$ than just getting the resistors and making one yourself, but it is a lot cleaner and well worth the cost. This is what I did and it works flawlessly
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Old 09-27-2020, 11:34 AM   #3
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I need a #4 by the bypass chart. .884 was the measured resistance. I have both original keys. Your saying I need a new key? Thanks.
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Old 09-27-2020, 01:03 PM   #4
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Quote:
Originally Posted by Fishin View Post
I need a #4 by the bypass chart. .884 was the measured resistance. I have both original keys. Your saying I need a new key? Thanks.
I am Saying it "could" be the key. If the metal tabs in the chip in the key are warn, then yes, That is the possible cause. Only way to know for sure is to get a new coded key. if it works, then that was the issue, if it doesn't work, then it is something else. The blinking security light IS a VATS issue tho.

Keep in mind, the VATS and keyless entry are 2 separate systems. IF you have keyless entry and works. If you have keyless entry and it works, this protects entry of the vehicle. Just a basic door entry protection with horn honk, which needs to be disabled by a key-fob or turn the ignition on with the key.
The VATS is an ignition enable/disable system.
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Last edited by Ercmann; 09-27-2020 at 01:06 PM.
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Old 09-27-2020, 06:12 PM   #5
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The keyless entry hasn't worked in a decade but never had a issue with starting. Thanks.
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Old 09-29-2020, 08:47 PM   #6
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Quote:
Originally Posted by Fishin View Post
97 Firebird .V6 Car won't start. Tried resetting VAT by the 10 minute method but the security light never stops blinking. Could it be the BCM? Should I do the VAT bypass? Thanks.
I think a durable resistor would help!
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