What does the VATS system do?

Reply Subscribe

Thread Tools

Search this Thread

Jun 22, 2005 | 08:06 PM

regorih383

Thread Starter

TECH Fanatic

iTrader: (21)

Joined: Dec 2003

Posts: 1,702

Likes: 2

From: Pasadena Tx,

What does the VAS system do?

If anyone can tell me what the VAS system does and if anyone has a problem with it.
Thanks
Roger

Jun 22, 2005 | 08:50 PM

FIREHAWK #07

TECH Junkie

iTrader: (1)

Joined: Nov 2004

Posts: 3,215

Likes: 0

From: TX

do you mean VATS????

Jun 22, 2005 | 09:12 PM

96blackz28

TECH Enthusiast

iTrader: (3)

Joined: Dec 2004

Posts: 535

Likes: 0

From: Centreville, VA

inst that the security system?

Jun 22, 2005 | 10:15 PM

HBHRacing

TECH Enthusiast

Joined: May 2005

Posts: 669

Likes: 0

From: Charlotte, NC

VATS or Passkey system is an antitheft device that will not allow the car to be started without the correct key. There is a resistor pellet in the Key. 5 volts is aplied to one side, steped down by teh resister and then sent to the decoder module. If that reading matches the preset value the car will be alowed to start. If not, the starter relay will not engauge and the fuel control will not be enabled and you will get no injector pulse.

Jun 23, 2005 | 12:14 AM

regorih383

Thread Starter

TECH Fanatic

iTrader: (21)

Joined: Dec 2003

Posts: 1,702

Likes: 2

From: Pasadena Tx,

would you ever have the VAST system removed form the pcm?? Would be nice not to have it since the key censor can be broken right>????

Jun 23, 2005 | 01:45 AM

FIREHAWK #07

TECH Junkie

iTrader: (1)

Joined: Nov 2004

Posts: 3,215

Likes: 0

From: TX

so what happens if you use another key by accident and cant get the car to start anymore???

Apr 13, 2020 | 08:15 AM

Johnny_M

10 Second Club

Joined: May 2018

Posts: 168

Likes: 21

Quote:

Originally Posted by regorih383

would you ever have the VAST system removed form the pcm?? Would be nice not to have it since the key censor can be broken right>????

there is a post with instructions how bypass it with a resistor. Search for it on ls1tech.
I bypassed mine with a resistor long before installed EfiLive. It can be turned off with EfiLive.

Trending Topics

418 Stroker Build

12

433
Trans cooler updated information

11

266
Engine damage diagnosing

68

3.2k
Rear End Options

8

179
LS power steering pump to A-body

5

129

Apr 13, 2020 | 08:45 AM

WhiteBird00

Ungrounded Moderator

iTrader: (4)

Joined: Nov 2003

Posts: 11,334

Likes: 347

From: Jacksonville, FL (originally from Toronto Canada)

Quote:

Originally Posted by Johnny_M

there is a post with instructions how bypass it with a resistor. Search for it on ls1tech.
I bypassed mine with a resistor long before installed EfiLive. It can be turned off with EfiLive.

I would think that they have discovered this sometime within the nearly 15 years since the last post.

BTW, VATS cannot be programmed out or turned off with EFILive or any other PCM programmer. Yes, you can program the PCM to ignore the missing fuel enable signal from the BCM (that's one of the two ways VATS disables the vehicle) but you can't program the starter relay control or the SECURITY light in the instrument cluster. Those are both controlled by the BCM which is not programmable. You can physically rewire the starter relay to bypass the BCM but if you're going to do wiring anyway, why not just do a standard VATS bypass with resistors and eliminate the warning light at the same time?