Good personal day , I have a problem to boot the KW1281 protocol , searching site articles found that during the ECU boot process should return : 00 55 01 8A, but in my it does not occur , if you use software to monitor the connection made by the VAG-COM , was presented as follows: 00 00 55 01 0A then communication occurs normally as you can see in place of 8A 'm getting 0A , however VAG -COM can make the diagnosis normally.



I am developing an application in Microsoft Visual Studio , to make the diagnosis , but I am not able to boot , this below the code I'm using :

rs.BreakState = true; //bit 0
System.Threading.Thread.Sleep(200); //timer for 5 baud
rs.RtsEnable = true;
rs.DtrEnable = false; //TX
rs.BreakState = false; //bit 1
System.Threading.Thread.Sleep(200);
rs.BreakState = true; //bit 0
System.Threading.Thread.Sleep(200);
rs.BreakState = true; //bit 0
System.Threading.Thread.Sleep(200);
rs.BreakState = true; //bit 0
System.Threading.Thread.Sleep(200);
rs.BreakState = true; //bit 0
System.Threading.Thread.Sleep(200);
rs.BreakState = true; //bit 0
System.Threading.Thread.Sleep(200);
rs.BreakState = true; //bit 0
System.Threading.Thread.Sleep(200);
rs.BreakState = true; //bit 0
System.Threading.Thread.Sleep(200);
rs.BreakState = false; //bit 1
System.Threading.Thread.Sleep(200);
rs.DtrEnable = true; //RX da ECU
System.Threading.Thread.Sleep(200);


When I run the application I get the following ECU data :

00 00 55 01 55 01 0A 0A

After receiving the 0A sending its complement to the ECU in the case F5 , but not receive any data from the ECU , I wonder if someone already went through the same problem or have any suggestions that might help me .

Since already appreciate the attention .

Do you have the pinout for this ECU? we collect this data, please share it with us.
Probably it is a timing problem by your software. The Byte can be various - it's correct

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Ich freue mich über Infos mit Herstellernummern zu VAG Steuergeräten mit CAN TP 1.6/2.0 oder UDS Protokoll wenn die Pinbelegung (Diagnoseleitungen und Spannungsversorgung) bekannt ist.

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The pins are used : 4, 7 e 16.

Please if anyone can help me or have a code that boot up this ECU and can send me , I tried to use the WBH - Diag and did not work , as we have already sent in the picture above with the VAG-COM software works normally also can make the connection using the software VWTool.