Modified chips going into Limp mode

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Dean
Posts: 2
Joined: Tue Mar 09, 2010 5:33 pm

Modified chips going into Limp mode

Post by Dean »

I have TP + APU1 (Moates)

I am having problems with modified burnt chips (27SF512).

If I burn a chip with a standard BIN file or copy a standard chip it works.

If I use TP to modify the BIN file (in any way) then save it, program it to a chip, the car will go into "Limp Home mode" 80-90% of the time on startup, the times it goes into limp mode it wont turn off until i cycle the ignition twice. Comes up with error "Memcal Error".

If i emulate with a standard bin file, the car starts and runs fine.
If i emulate with a standard bin file, then make changes while emulating, it works all good.Now (with out saving the file) the car starts 95% of the time on the emulator all good.

If I emulate with a standard BIN file, make changes, *SAVE the file*, the car will go into "Limp" mode 90% of the time on startup, it wont turn off until i cycle the ignition twice.

Emulating, If I start the car on a standard bin file then upload a modified bin to the emulator while the car is running it runs fine, until i turn off the car then i'm back to 90% chance of going into limp mode.

This is on a Commodore V8 with BMZC1766, 16176424, $11

Any help would be MUCH appreciated


:?:
bmwconnect
Posts: 48
Joined: Tue Mar 09, 2010 5:52 pm

Post by bmwconnect »

checksum corrected?
Dean
Posts: 2
Joined: Tue Mar 09, 2010 5:33 pm

Post by Dean »

Checksum?

I thought TP automaticlly corrected the checksum? Correct me if im wrong or if it needs configuring.

If i compare the two files (Standard - Modified) there pops up two differences that I didn't create, in blue.

they have an address of "6006 & 6007" and say "No match in database" I assumed this was the check sum changing, (YES assumption is the mother of all **** ups)

But I still tryed changing these changes back to the original, by using the HEX editor, programmed the chip but still the same problem.

Cheers for your post.
BrendanSmall
Posts: 52
Joined: Mon Nov 09, 2009 4:57 am

Post by BrendanSmall »

Tunerpro will automatically correct the checksum, but you have to configure it to do so. It's in the XDF Header info.
robertisaar
Author of Defs
Posts: 962
Joined: Sat Feb 21, 2009 3:18 pm
Location: Camden, MI

Post by robertisaar »

6006 and 6007 is a common place for the checksum to be placed.
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