VATS Thread

[Caleditor]

look at the light grey bar on the link

http://www.pdqforensics.com/learning.htm

[lionelhutz]

Yes, Steve, the small part of my reply you quoted came from a paragraph describing the different 98 model year theft systems and the F-body was a BCM with a PWM signal and an output that controls the starter inhibit relay in '98.

[Caleditor]

All of the RWD vehicles are straight forward. The issue is with the FWD cars.

I feel that all of the VATS should be in one thread

[Caleditor]

VTD CONFIGURATION	Unitless Number Value	This is used to activate the different VTD functionalities within the PCM.
VTD FAIL ENABLED BYPASS	Switch On or Off	Enables or disables the theft Fail-Enabled mode. Thiscapability is required for export vehicles.
VTD DIAG ENABLED	Switch On or Off	TRUE indicates the diagnostic is enabled and VTD failure is reported via Class 2.
VTD BAD PASSWORD	SHORTCARD	Threshold to compare against the Bad Password Counter during certain decision states.
VTD LEARNED ENOUGH	SHORTCARD	Threshold to compare against the Auto Learn Counter during Auto-Learn state.
VTD LEARNED PASSWORD	SHORTCARD	Threshold to compare against the Identical Password Counter during Learn Password state.
VTD DISABLE TIME	Seconds	Expiration time for the Fuel Disable Timer duringFuel Disable Lockout state.
VTD AUTO LEARN	Seconds_L	Expiration time for the Auto Learn Timer duringAuto-Learn Pending state.
VTD Class 2 INIT	Seconds	Expiration time for the PCM Class 2 Init Timer duringIgnition 1 Off and Powerup Transitions.
VTD Class 2 AUTO LEARN	Seconds_L	Expiration time for the Class 2 Auto Learn Timer duringAuto-Learn and Auto-Learn Pending states.
VTD PWM MAX ALLOWED FREQ	Hertz	Maximum allowable frequency for new vehicle antitheft pulse.
VTD PWM MIN ALLOWED FREQ	Hertz	Minimum allowable frequency for new vehicle antitheft pulse.
VTD PWM CONSEC READS to PASS	SHORTCARD	Number of consecutive good reads of pulse frequency requiredbefore setting VTD PWM Got Correct Frequency = TRUE.
VTD PWM TIME TO FAIL ENABLE	SHORTCARD	Threshold of the number of bad reads of pulse frequency thatare allowed before setting the VTD Fail Enable flag.
VTD PWM LO VOLTS LIMIT	Volts
VTD PWM LO VOLTS ADDTNL TIME	Seconds	Time added to VTD PWM Decision Point Time under low voltage conditions when deciding the fuel disable point.
VTD TIME TO IGNITION OFF	Seconds	The amount of time the ignition is off before the VTD logic performs powerdown state transitions.
VTD FUEL OFF TIME	Seconds	Expiration time for the Fuel Disable Timer during Fuel Disable Lockout state.
VTD PWM SIGNAL SAMPLE PERIOD	SHORTCARD	Lower threshold of valid signal sample period when determining if a correct frequency has been received.
VTD PWM VALID PULSE PERCENT	Percent	Lower threshold of valid pulse percent when determining if a correct frequency has been received.
VTD TIME TO DISABLE POINT	Seconds	Initial expiration time for the VTD PWM Decision Point Timer when deciding the fuel disable point.
VTD Class 2 NOT AN EXPORT VEHICLE	Switch On or Off	Used to turn On/Off the VTD Class 2 auto learning function.

Dirt old 512kb 0411 type VTD parameters from previous thread on disassembly of the code

[busta9876]

Here is what I have documented with vehicles locally. The first number value is the default CATS value for Vats, the second column is what I changed it to. In ALL applications, the VATS Injector Disable time is set to 0. All these were done with passlock sensors wires cut or disconnected.

I did find on a particular 1998 Chevy Malibu 3.1L, that I was able to find a configuration that would allow engine to run with BCM fuse pulled. However, once BCM was again on the data bus, vehicle would start and die once the security light came back on. I found yet another configuration that allowed the engine to run with BCM plugged in, security failed, or unplugged.

1997	Pontiac	GrandAm	Passlock	1	2
1997	Chevy	Lumina		1	2
1997	Buick	LeSabre		1	2
1997	Pontiac	Bonneville		1	2
1997	Olds88		PK I/II	1	2
1999	Pontiac	Bonneville	PK I/II	1	2
1998	Chevy	Mailbu	Passlock	0	1
1999	Olds	Alero	Passlock	0	1
2000	Pontiac	Montana	PK3	1	0
2000	Pontiac	GrandAm	Passlock	1	0
2001	Pontiac	GrandAm	Passlock	1	0
2003	Pontiac	GrandAm	Passlock	1	0
2004	Pontiac	GrandAm	Passlock	1	0
2004	Olds	Alero	Passlock	1	0
2003	Pontiac	Aztec	Passlock	1	0
2004	Buick	Buick	pk3	1	0
1999	Chevy	Lumina		0	0
2000	Pontiac	GrandPrix	PK3	0	0
2001	Pontiac	GrandPrix	PK3	0	0
2003	Pontiac	GrandPrix	pk3	0	0
2001	Chevy	Impala	Passlock	1	0
2002	Chevy	Impala 3.8	Passlock	1	0
2004	Chevy	Impala 3.8	Passlock	1	0
2005	Chevy	Impala	Passlock	1	0
2002	Chevy/Pontiac	Venture/Montana	PK3	1	0