![]() |
Re: Gearshift Maps Thread Hijack
Quote:
Those posting more or less on a commercial front, surely should separate their promotions accordingly. ;) |
Re: Gearshift Maps
I have no qualms about removing or moving my posts.
I've been posting here because I like to support Phil's transmission control unit work and it's my hope that the Ecutuner software/interface package will result in exponentially increasing his library of TCU and ECU firmware. My appologies |
Re: Gearshift Maps
Good stuff Mike, thanks for sharing.
Any chance I can get a copy of your software to play with when it's ready? Phil. |
Re: Gearshift Maps
Yep, the software will be a public download but the coms will require the use of a ttl232r cable which has been purchased from/programmed by me. I'll send you a cable.
I'm working on data and table editing features now. The features and tabs involved in communicating with the control unit, everything from set up to monitoring parameters, monitoring bitmaps, clearing memory, and downloading firmware is complete (including debugging and optimizing). I just stopped posting progress after being scolded for jacking your thread. Quote:
|
Re: Gearshift Maps
Quote:
I can understand how this may have happened. The commumication hardware does seem, at first, to have direct application. However, everything not related to downloading the TCU ROM doesn't. Starting here put you on a slippery slope. Failing to correct the situation after you were alearted to it might be a scoldable offense, but I have no interest in doing so. What you do about this reflects more on your character than your work. |
Re: Gearshift Maps
Quote:
At long last, another who in spite of possible negative reaction, has the courage to make a statement, due and necessary in the interest of members. |
Re: Gearshift Maps
A member here recently sent me an email asking this question
Quote:
The subroutine that determines the Sol A Duty cycle is at address EBAA in the USDM TCU (rom id:705404). First it chooses a map from a list of thirty seven 16bit map addresses at location C870. Code:
0000C870 C9 0E C9 26 C9 3E C9 56 C9 0E C9 0E C9 6E C9 86 The next address CA2E (at C890) is used for Reverse gear. The next four addresses (CA46,CA5E,CA76,CA8E), I'm not quite sure about. Maybe they are used under some kind of error condition. The 1st one related to 1st gear, the 2nd for 2nd gear etc. The important part is the final block of 16 addresses from C89A to C8B9. These are split as follows Code:
Want_1 Want_2 Want_3 Want_4 Now I'll explain how to decode the maps, taking the one at CAA6 as an example: Code:
0000CAA0 xx xx xx xx xx xx 0F 7D 23 28 1F FA 1B 58 2F 96 Code:
TPS M C Code:
TPS M C Now we use the straight line formula y=mx+c. For example, if we have 10% throttle, that's a TPS value of 25, so we select the 2nd line of the table, M=250 and C=7000. Now we do y = (250*25)+7000 = 13250. The duty cycles in the TCU are represented by numbers from 0 to 20000. So 13250 is about 66% duty. I've plotted some graphs to show the different maps. http://www.alcyone.org.uk/ssm/usdmsola.jpg That's how the base Sol A duty cycle is calculated. Using the information above, you should be able to recalibrate the line pressure. But there is a little bit more to it. After calculating the base duty cycle, it applies a compensation based on the atmospheric pressure signal. It compares the barometric pressure to a list of 8 thresholds at address CBC6 and chooses the corresponding map address from a list of C8BA. Code:
0000C8B0 xx xx xx xx xx xx xx xx xx xx CB CE CB E6 CB FE Code:
TPS X Y Z If the vehicle is not fitted with a barometic pressure sensor, or the sensor is faulty then the compensation is calculated differently based on current gear and vehicle speed. I haven't fully analysed it because it should not happen in the normal case. I hope that information is helpful. I should also add that the first block of 16 maps at C870, the ones that are used if the torque control signal fails, are decoded in exactly the same way as the normal case ones at C89A. I have not looked at the non-USDM code. The VTD boxes may work differently. |
Re: Gearshift Maps
That's awesome Phil,
Adjusting the bottoms of the 3rd want 3 and 4th want 4 maps aught to extend the lives of a lot of transmissions that don't have performance valve bodies. |
Re: Gearshift Maps
Phil,
One of your cars is JDM right? Is the TCU case on the JDM the same as the US model? Someone has sent me a TCU that he got with a JDM transmission which was supposed to be a JDM SVX TCU but the case is different and I'm suspecting it's something else. The case sticker is KM. |
Re: Gearshift Maps
Quote:
Not the same, the JDM TCU case is mirror image to the US case, mounting under RHD-driver side. I might be able to contribute more, What is the trans number on the front diff? |
Re: Gearshift Maps
Quote:
|
Re: Gearshift Maps
I don't have the transmission. I'm just supposed to socket the TCU and put my shift maps on it. The mount on this case isn't a mirror image of the US case. It's about a 3/4" high by 3" long tab with two screw holes.
|
Re: Gearshift Maps
Quote:
I wonder if the owner was told that the TCU was a match to the trans? All JDM/UK TCU cases that I have seen are exact mirror image to US |
Re: Gearshift Maps
Ya, I'll ask him. I suspect the transmission and tcu he was sold are in fact jdm but are jdm something else not svx. Who knows but hopefully we'll be able to figure it out.
|
Re: Gearshift Maps
Quote:
|
All times are GMT -6. The time now is 06:18 AM. |
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
© 2001-2015 SVX World Network
(208)-906-1122