As a test I am running a E7 ecu in my E6 with the Tephra 90550701 V7 rom. ALS tables are in my xml and setup the same is in my original E6 ecu, did swap pin 6 to pin 53 in order to have working ALS/SAS. However ALS/SAS does not seem to activate, even the logs show that fuel (inj duty / ipw) is shut down 1 sec after throttle release. When I apply a ground to the wrie at pin 53 on idle the solenoid activates and the car starts to hunt so my hardware is still working properly.

Can it be that there is no ALS/SAS routine in the Tephra 90550701 V7 rom or do others have no issues with getting ALS/SAS to operate with this ROM

Anyone else who has ALS/SAS working on the Tephra 90550701 V7 rom?

Thanks in advance,

Roy

 

I recall having an issue with SAS activating with a 9055 V7 rom. Try a V5 rom & see how it goes.

 

Hi Foxbat,

Have you had the ALS/SAS operating on the V5 ROM. I did a quick disassembly of both the V5 & V7 ROM but was not able to find differences in the SAS routine so far. Also the subroutine for SAS seems to be called in both ROMS.

 

Yes, I used a v5 9055 rom E7 ECU on an Evo 4 with sas activated & the results were impressive producing very loud bangs. However, & for some weird reason, activating sas on an actual E7 rather than E4/5/6 produces mild bangs only.

 

maybe you need to look into the injector fuel cut routine. Perhaps it works a little different on a SAS enabled car.

 

Thanks for the information Foxbat, The case with the actual E7 and SAS is most likely due to the EGR, most say the EGR needs to be blanked off in order to have good operating SAS.

 

My Evo 3 engine & SAS hardware has no EGR components and I get the same instantaneous Decel fuel cut with the ALS routines enabled.

 

Even with EGR blanked, I never manged decent bangs when sas is activated.

 

Was this with the V5 ROM as well?

 

I believe so. I did have the car running on the v5 ROM a while back, and I don't recall the ALS working, because I do recall trying to fix the decel fuel cut always cutting the fuel instantly.

 

Well, I think I might have found something interesting, in the picture below I have made a screenshot of 2 dissassemblys of the ALS routines: left side is ROM id:98640014 E7 JDM ROM, right side is 90550001 E7 EDM ROM and code looks the same as in the Tephra V7 ROM.

As you can see for the 90550001 ROM there is a extra RTS and NOP command at the end of the code, can someone tell if they might be the cause of the ALS not on the 90550001 ROM and the Tephra V7 ROM.

RTS seems to be: Return from subroutine --> go back to main routine which called this subroutine

Thanks a lot!

 

Have you made a comparison between v5 & v7 (9055)?

 

Coming at it from the other direction, this is what I have been able to find.


I Traced the Gate 1 of IC32 Back to the Chip. It's a straight shot, there aren't any passives in series. As best I can tell, it leads to Chip Pin 134 (position 30 from the left)



Another Angle



This is what I found from the manual.



Pin 134 corresponds to Port J8



The DR bit is the one that toggles the pin.

Hopefully this is helpful. I have verified this info as best I can with the resources I have. If someone else could replicate these findings that would be great.

 

any chance I can get someone to send me that rom i donated but tephra doesnt respond.

 

This is helpfull indeed, now I need to check the code as well. I will try to trace it the same as you on my pcb at home as well.