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Tuners Rejoice! Free Tuning For M4.4!


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Researching the A/C problems it seems a M4.4 ECU will work in a M4.3 no problem, but not the other way (doesn't matter in that case). Can anyone confirm this for me?

NOPe, the pinout on the ac controls is different from 4.3 to 4.4. The ac will be inop in both cases. Frying the controls if tried for too long.

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Some of you may run into problems flashing in the car due to the high voltage required. I recommend using a high powered battery charger overnight before and during flashing to keep voltages up.

If you can't program in the car, you can try flashing on the bench. Here is a schematic borrowed from the instruction manual included with MotronicSuite:

ecuconnectorschamtic.jpg

You will need some female spade connectors to fit over the pins in the ECU. I just got some at Radioshack. You will also need a 13.5-15V power supply. There are a lot of options for this. You can buy a AC wall plug rated for the correct voltage, or buy a bench power supply. I used two AC wall plugs tied in series, 5.5V and 9.6V. I already had them and didn't want to spend any money on a power supply. On the ECU all ground pins are common so you only need to hook up to one ground pin on the ECU.

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Was doing some thinking.

Once all of the maps have been found, I can start looking up the pointers in the ASM. I can then figure out how things works. And see what code uses which pins.

Once that is done, say you deleted sas, well as long as the sas pin coming out of the cpu is not connected to any external IC's, you could possibly use that pin as an input and confure stuff for oh say a flat shift switch.

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Was doing some thinking.

Once all of the maps have been found, I can start looking up the pointers in the ASM. I can then figure out how things works. And see what code uses which pins.

Once that is done, say you deleted sas, well as long as the sas pin coming out of the cpu is not connected to any external IC's, you could possibly use that pin as an input and confure stuff for oh say a flat shift switch.

Totally, if you could figure that out it would be awesome. It would be really nice if we could get two pins set up to control VVT. Maybe even a control a progressive water injection system

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Mr. jnderr (john) from Springfield Ohio flashed my ECU to a T5M a little over a year ago after I did my manual swap. He had some insight into what is going on here, and currently is working on a whiteblock RWD project. You might want to ping him. :)

Good job Tightmopedman9... your research is awesome.

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> Where did you get this schematic?

See above the image: "Here is a schematic borrowed from the instruction manual included with MotronicSuite:"

They are found in the program folder.

Dilemma has put a lot of information in those manuals. They should be read.

@poy: Please use M4.4. ME is for electronic throttle like in ME7

@Tightmopedman9: The DAMOS files can be opened in WinOLS, but is made for other software used by the car manufacturers.

Sorry for being pedantic :-)

Oh, sorry about that. I kinda wondered myself if car manufacturers were using WinOLS as their software, it didn't seem to make much sense to me.

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When using a standard OBDII cable the codes for EVAP and SAS don't come up, however, when using Vol-FCR they are present. Does anyone know what sort of bearing this holds on codes pulled for emissions?

If a regular code scanner doesn't see'em emission doesn't VOL-FCR sees everything for whatever reason.

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