GenIV BCM/VATS disable
Thread Starter
Teching In
Joined: Jan 2017
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GenIV BCM/VATS disable Hello all,
Swapping a L92+6L80E from an 08 escalade into my land cruiser. I intend to wire up enough of the BCM to use it for cruise control and TUTD shifting (and if possible P/N starter interlock and reverse lights, but these are secondary goals).
I seem to remember reading somewhere that if a VATS disable is done on the PCM that it will no longer communicate with the BCM. I can't find that thread anymore.. and no idea whether it applies to certain PCMs and/or different tuning software types or not.
Does anyone know anything about this?
Thanks for any help.. this place is quite an awesome resource
-Justin
Swapping a L92+6L80E from an 08 escalade into my land cruiser. I intend to wire up enough of the BCM to use it for cruise control and TUTD shifting (and if possible P/N starter interlock and reverse lights, but these are secondary goals).
I seem to remember reading somewhere that if a VATS disable is done on the PCM that it will no longer communicate with the BCM. I can't find that thread anymore.. and no idea whether it applies to certain PCMs and/or different tuning software types or not.
Does anyone know anything about this?
Thanks for any help.. this place is quite an awesome resource
-Justin
Last edited by bloc; Jan 28, 2017 at 10:22 PM.
On The Tree
Joined: Jan 2015
Posts: 102
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From: New Zealand
Please don't take this as verbatim but I have experience with 08/early 09 LS3 (before they went to brass throttle body blade revisions..) E38 ECU and was going to go 6L80 with my swap initially, so TUTD was critical.. From what I could tell, BCM does not handle this function, as the ECU also plays TCM... so I was just do the HP Tuner VATS delete and go from there. I knew a guy who owned an auto electrician business, he was considering hacking BCM/making thrust vectoring/stability control work on my swap but said it also would be incredibly hard. Basically, BCM is nearly impossible to work with for a mere mortal like you or I.
There is also an update to the 6L80 with the '14 stingray that gives shift times around 200ms. Mostly software/'TCM' but some changes supposedly to the valve body.
Good luck..
There is also an update to the 6L80 with the '14 stingray that gives shift times around 200ms. Mostly software/'TCM' but some changes supposedly to the valve body.
Good luck..
Thread Starter
Teching In
Joined: Jan 2017
Posts: 8
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I've been doing a lot of digging on tuning the BCM and agree.. everything I'm seeing suggests (or flat-out states) that actually making changes to the BCM is well above most of our heads.
However, there are a couple cases I've found (online) of the BCM being wired up to control those functions just fine.. and another case of someone seemingly reputable on here giving the advice repeatedly that wiring in the BCM is the cheap/easy way to get those functions on a E38 ECU.
https://ls1tech.com/forums/conversio...l#post14738394
http://www.fourwheeler.com/how-to/13.../photo-17.html
Basically, I'm not giving up yet.
However, there are a couple cases I've found (online) of the BCM being wired up to control those functions just fine.. and another case of someone seemingly reputable on here giving the advice repeatedly that wiring in the BCM is the cheap/easy way to get those functions on a E38 ECU.
https://ls1tech.com/forums/conversio...l#post14738394
http://www.fourwheeler.com/how-to/13.../photo-17.html
Basically, I'm not giving up yet.
BCM is needed for this TAP shift option to work. The TAP switch shifter creates a mulitplex signal to the BCM. The BCM takes those signals and sends them over CAN BUS to the TCM. The TCM then decides if it is safe to shift. We have this fully functional on factory truck calibrations. Also cruise works the same way.
Thread Starter
Teching In
Joined: Jan 2017
Posts: 8
Likes: 0
BCM is needed for this TAP shift option to work. The TAP switch shifter creates a mulitplex signal to the BCM. The BCM takes those signals and sends them over CAN BUS to the TCM. The TCM then decides if it is safe to shift. We have this fully functional on factory truck calibrations. Also cruise works the same way.
When you do it, is anything special needed with BCM calibration? or just give it power/ground, relevant switch wires, GMLAN hookup, and it works?
Does VATS delete present any problems?
