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Vehicle speed calibration HELP NEEDED
Posted:
Fri Jun 30, 2006 9:19 pmby ECUboy
Hi,
I have replaced my EDM 5 speed box with a JDM STI 6 speed box. The vehicle speed reported from the ECU does not match the actual speed. Is there a way to calibrate the ECU?
Posted:
Sun Jul 02, 2006 9:30 amby NeverLies
There is no calibration procedure. Gear constants have to be modified in your ROM to match your new gearbox.
Offset for these parameters are not published. You need to reverse code to get offset for your ECU. I did not look yet at non STI rom so not even sure that your code can handle 6 speeds. What is your rom ?
Posted:
Mon Jul 03, 2006 9:00 amby ECUboy
Hi,
My rom is AJ830-8820, A4TE300D.
How to reverse code to get offset for your ECU? Any instruction?
Posted:
Tue Jul 04, 2006 1:01 pmby NeverLies
You need to use IDA (or any decompiler that may understand 68HC16 code).
Do a quick search, you should find some library provided by Colby for IDA 4.7 and 4.8 in order to handle HC16.