alans91z

For the S_AUJPv5 bin, ive found a few items to adjust from this thread starting at post#9, specific info found in #13:
https://www.thirdgen.org/forums/diy-...fter-prom.html

-(Scalar) Transmission Type (L3C38?) - 0=Auto; <>0=Manual
-(Switch) 18 (0x8018) - Bit 2- Manual/Automatic Transmission Select= 0 (Not set); Manual = 1 (set)

Other than that i can't seem to find any other settings. Supposedly IAC values are different between the two trans types but when i make the adjustments to and then compare to the automatic i cant find any differences (using the compare function), but im guessing im using the program wrong.


Are there any other settings that need to be addressed?

ULTM8Z

I think that should be it for addressing the transmission swap.

Not sure what you mean by "IAC values"

alans91z

Via 84Elky https://www.thirdgen.org/forums/diy-...fter-prom.html

"As Six Shooter said, AUJP and S_AUJP are set for automatics. This can be verified by looking at the Calibration value (under "Flags" in TPro) in bit 2 of byte (Switch) 18 (0x8018). Automatic = 0 (Not set); Manual = 1 (set). But in addition to this bit, there is also a variable in the AUJP code at 0x8671 that defines the trans type, but don't believe it is availabe for editing through the downloadable XDF files (0= Auto; <> 0= Manual). Looking at teh code, this appears to be an inportant variable in controlling IAC position when RPM is within 1587 of Desired Idle RPM (the normal case) and the car is Moving. You can change this bit with a hex editor or create an entry in the XDF so it can be edited."

If im not mistaken he is referring to Idle Air Control solenoid, which i don't fully understand yet but believe it helps the car to idle (or helps kill it when it isn't working correctly). From what is said above, it seems IAC operates withing a certain range of Desired Idle RPM.

So when i made the changes to the bin (set the scalar and flag), saved and then compared to the original file i couldn't see that the IAC values changed for any of the iac parameters that i could find. Again i am probably missing something with the program, still novice at this point /shrug

ULTM8Z

I took a look at ANHT (90-91 Corvette automatic) and AXCN (90-91 Corvette 6speed manual) and did a compare...

Should be pretty much the same as Camaros

I've attached the two bins here. Recommend doing a compare in TP. Yeah, there are lots of differences in the IAC and throttle follower settings.

alans91z

thanks! will take a look when i get a chance

84Elky

There are only 2 S_AUJP settings for Auto/Manual Trans:
... Scalar "Transmission Type" at 0x671 (not L3C38? in above quote): 0=Auto; <>0 = Manual. This is the Scalar referenced in the linked post above which said it may not be editable via the XDF, but it is as "Transmission Type".
... 0x018, bit 2: Not Set=Auto; Set=Manual

With 0x671 "Transmission Type" set <>0, IAC deadband adjustments and other positioning calculations apparently necessary for auto trans cars are bypassed if manual trans car's RPM differs from Desired Idle RPM by more than 1587, and car is moving (VSS > 0). HTH.