rkam Posted March 2, 2013 Report Share Posted March 2, 2013 M4.4 can use many different communication protocols. Unless the code-disabling byte is preventing the fault check itself, some protocols may still read the fault code. Does anyone know how to use real 9-bit serial mode on a PC? I'm trying to use the McMess protocol, but the PC doesn't understand the replies from the ECU. Link to comment Share on other sites More sharing options...
5cyl Posted March 2, 2013 Report Share Posted March 2, 2013 I know this is about tuning. but is there a way to clear the SRS light using this? i know that would be very helpful for anyone that accidentally dident disconnect their air bag when working on dash or seat belts. Link to comment Share on other sites More sharing options...
Tightmopedman9 Posted March 2, 2013 Author Report Share Posted March 2, 2013 M4.4 can use many different communication protocols. Unless the code-disabling byte is preventing the fault check itself, some protocols may still read the fault code. Does anyone know how to use real 9-bit serial mode on a PC? I'm trying to use the McMess protocol, but the PC doesn't understand the replies from the ECU. I doubt you'll find much help here on such an arcane serial connection. Why are you interested in the McMess protocol, it's speed is much too slow for usable datalogging. I know this is about tuning. but is there a way to clear the SRS light using this? i know that would be very helpful for anyone that accidentally dident disconnect their air bag when working on dash or seat belts. No, even if I could I would not disable the SRS light. If it bothers you, remove the light from you dash. Link to comment Share on other sites More sharing options...
rkam Posted March 2, 2013 Report Share Posted March 2, 2013 I don't know what the McMess is capable of on M4.4 yet, so I wanted to figure it out. If you have any information about it, please let me know. Read ROM command seems to be limited to bank2 also in McMess. On some VW ME7 it is supposed to be able to log 270 bytes/sec in 10400bps mode, and 1000bytes/second in high speed mode. 9-bit serial is also used in M1.8 high speed mode. 187500bps Link to comment Share on other sites More sharing options...
Tightmopedman9 Posted March 3, 2013 Author Report Share Posted March 3, 2013 I don't really know anything useful about McMess, just information I've read from a few posts about it. I didn't realized that each flash bank contained the RPM limiter. I added 2 additional scalars to allow for both RPM limits to be adjusted. New .xdf link is in first post. Link to comment Share on other sites More sharing options...
Fudge_Brownie Posted March 4, 2013 Report Share Posted March 4, 2013 I know this is about tuning. but is there a way to clear the SRS light using this? i know that would be very helpful for anyone that accidentally dident disconnect their air bag when working on dash or seat belts.You can reset the light using Vol-FCR. I think moped's reply assumes you are trying to delete it, not reset it. Link to comment Share on other sites More sharing options...
PFloyd36069 Posted March 4, 2013 Report Share Posted March 4, 2013 I flashed an ecu today and changed idle speed just to verify that it actually flashed it OK and all...the idle speed didn't change to what I had set in tuner pro Link to comment Share on other sites More sharing options...
Tightmopedman9 Posted March 4, 2013 Author Report Share Posted March 4, 2013 Did you change the idle target based on coolant temp map? Did you change both maps? Link to comment Share on other sites More sharing options...
PFloyd36069 Posted March 4, 2013 Report Share Posted March 4, 2013 Yeah I went in and raised both of them.so they matched and then saved the file and opened it with motronic suite and updated the check sums and then flashed it Link to comment Share on other sites More sharing options...
Tightmopedman9 Posted March 4, 2013 Author Report Share Posted March 4, 2013 The idle target is based on coolant temp, did you alter every value, or just for one coolant value? Link to comment Share on other sites More sharing options...
PFloyd36069 Posted March 4, 2013 Report Share Posted March 4, 2013 I set every value to 1500 at first and then I tried 1100 because I didn't know what the maximum was. Neither one changed the idle speed. Link to comment Share on other sites More sharing options...
Tightmopedman9 Posted March 4, 2013 Author Report Share Posted March 4, 2013 Hmmm... Interesting, I acted on a hunch and assumed that was the only map for the idle target. I just looked through the DAMOS again and couldn't seem to find any other target idle maps for idle. You should look through the DAMOS and see if you can find any related maps. If you flash and MotronicSuite gives you the "Flash Completed Successfully" Message and your car starts it is verification enough to prove that you did flash the ECU. Link to comment Share on other sites More sharing options...
PFloyd36069 Posted March 4, 2013 Report Share Posted March 4, 2013 Yeah that's true, it runs fine Link to comment Share on other sites More sharing options...
5cyl Posted March 4, 2013 Report Share Posted March 4, 2013 You can reset the light using Vol-FCR. I think moped's reply assumes you are trying to delete it, not reset it. Thanks man. thats what i was implying. not disabling it just resetting it. Link to comment Share on other sites More sharing options...
Simply Volvo Posted March 5, 2013 Report Share Posted March 5, 2013 When you disable the evap, does that include the Tank Pressure Sensor and the canister shut off valve? Im converting from m4.3 to m4.4 and i dont want to have to worry about getting those things. Link to comment Share on other sites More sharing options...
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