So, did some experimenting today. Turns out, the flash routine for the SBEC-II is exactly the same as for the rom-aided SBEC (which is the protocol I'm using for the flashable SBEC modification). So, short story - I can read and flash SBEC-II's on the bench. I know a few guys had asked about modifying the '92 T3 cal (and T1). It looks like I could do them now, at least minor mods. I'm not near ready to make a 3-bar version yet.
Rob, you are the man,
1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS!12.57@104 :O)
1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
2004 GSW TDI, 5 speed, fully loaded, modified.
Aurora ignition wires for sale. Link to info
Super60 roller cams or custom/billet cams. Link to info
Oh yeah, this also means that my interface cable for the SBEC will also work for flashing the SBEC-II...
Time for some T-III's to see some added boost and still be comp controlled, maybe??
Bryan
86 GLHS #161, 2016 Impala
SDAC National Member, SDAC Buckeye Chapter Member
A man has got to know his limitations.....
Yeah, should be no problem. Well, except that the TIII boost control is more adaptive than the previous boost control. But, it still should be no big deal to max out the boost on the '92 TIII's (and T1's).
Awesome Rob!!! Great work.
Bryan
86 GLHS #161, 2016 Impala
SDAC National Member, SDAC Buckeye Chapter Member
A man has got to know his limitations.....
Awesome, can't wait
GREAT news!!
i have to tell janus about it
Well, I seem to have hit a bit of a snag with SBECII flashing. It seems Chrysler put some security features in there to keep you from writing any .bin file other than the original. I can read any file, and I can write back the same file, but if I try to write a different file, the write times out. Hmm...
I bet I could get around it if I can figure out what bytes are the security code. They must have some code stored on the multipurpose/PIA chip that's checking the data before writing it to the flash chip.
coool, sounds like getting a Masi cal for my 92 Daytona running 92 2.5 TI elctronics is in the future
when can i send you my 92 2.5TI cal and expect to have it back????????
Well, I have to figure out how to get around the security feature first. 2nd, the '92 code is all 3D like the T3 code. It will take a while to figure it all out.
so it wont be that soon? i have to figure out what to do with the car since it will be completely immovable. maybe il wait for you to get further along with this
OK, so I think I figured out the problem. The Toshiba chip used in the SBECII needs 20V to program it. But, the 20V has to be turned off to verify. So, the programming is complicated.
My write only failed because of the programming voltage. Not some Chysler security feature (though, there are a couple of security features when reprogramming via a DRBII, but they're not present when using a laptop...). So, If I put my SBEC module into a SBECII, it should work perfectly. But, flashing a stock SBECII is probably a no-go...
In other words you are saying the SBEC II would have to be socketed with a different chip for You to be able to flash it with your module?Originally Posted by ShelGame
Well, you'd have to pull the original toshiba chip, and install one of my flash modules. I'm 99% sure the pinout is the same. So, no special socket or anything is required.
So, out of curiosity, was there a way for the dealerships to flash the SBEC-II? Did the DRB-II supply the 20V? I know that the USB adapter I've been using is able to set a line high or low with DCD so maybe that sort of functionality could be leveraged for this. Would something like that work? Triggering the 20v with the DCD line, write, drop the DCD/20v and verify?
Also, I may be getting a buddy's SBEC-II from his 92 ramcharger. It's a little flaky in-car, but cold on the bench it should be OK. So, LMK if I can be of any help. I've got a little more time now that I'm not fighting with my bench rig so much.
Last edited by risen; 09-14-2009 at 05:21 PM. Reason: more info
Yes, the DRB-II supplied the 20V. Though it's not clear where it got the 20V from. Wall transformer maybe?
I need to figure out which pin to apply the programming voltage to. If it's the same as the bootstrap pin, then it might be easy. I guess I can test that on my bench... hold on...
Nope, that didn't seem to work. I don't know if it's the timing (I was trying to hit the boot button manually), or if it's just the wrong line. I've got to look into it more...
I love patents. It looks like if you put 20V on the bootstap/Rx line, you get the programming voltage. If you want to know how/when to apply the 20v, look here -
SBECII Flashing Patent
Scroll thru until you get to the flowchart. You can ignore the security stuff since we're bypassing all that and programming with a PC. Really, we just need to apply the 20V at the right times.
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