VAG-COM/VCDS EVERYTHING

[Elektrik1]

That schematic is for 0x46 transistor based output. You are correct, they are using transistors as diodes, together with zeners it performs level shifting 12V->5V.

About your schematic i don't see K-line and L-line Rx. K-line and L-line are bidirectional.
If that transistor with emiter "in air" i assimilate as a diode, can be Rx. And go on 17 and 19 pins of GAL. Thet mean that pins are IN, not OUT.
Look as a correct schematic for a 44HW, not transistors but correct and can see the Rx (K/L lines)

Thanks to Roma77 example, I have set up known GAL:
sshot-2018-12-31-01-57-00-1.png


which output PIN 9 LOW only when PIN 2 and PIN 3 are low.

Adjusted Arduino code a bit:

unsigned long pow2(unsigned long p){
    return 1UL << p;
}

void set_output(unsigned long a){
  for(unsigned int i = 22; i<=39; i++){
    unsigned long pn = pow2((unsigned long)(i-22));
    pn = ((a & pn) == pn);
    Serial.print(!pn);
    if(pn){
      pinMode(i, OUTPUT);
      digitalWrite(i, LOW);
    }else{
      pinMode(i, INPUT_PULLUP);
    }
  }
}


void setup() {
  Serial.begin(500000);
  //Main loop 
  for(unsigned long i = 0; i<=pow2(18UL)-1; i++){
    Serial.print(i);
    Serial.print("\t");
    set_output(i);

    unsigned long res = pow2(18UL)-1UL;
    for(int j = 22; j<=39; j++){
      if(digitalRead(j) == LOW){
        bitClear(res, j-22);
      }
    }

    Serial.print("\t");
    Serial.println(res);
    
  }
}

And got such input (attachment). Results are good, 262144(including all zeros) combinations on all pins. Now performing on 0x46 GAL.

[eliteland786]

Got the 18.2.0!!! It's ALIVE!

@KOLIMER! WHEREVER YOU ARE, GOD BLESS YOU.

Small tribute for you man!
Attachment 583433

Well done...nice touch.

[heshamzn]

hi all im new and i think i cant program my vcds with flash or whatever im not expert on this things but any way that's my vcds and my question can i use it with vcds lite ??
it gives me error message about license and cant check the car with it any more
IMG_1902 (Copy).JPG

[Elektrik1]

Performed scan of 0x46 GAL, performed reconstruction using MATLAB, got 31 different cases, as it can be seen, CLK pin and pins >9 does not influence on output logic. GAL logic can be reconstructed with this truth table.

sshot-2018-12-31-04-41-15-1.jpg

But it's incorrect, since I have filtered out rows by selecting only unique XOR'ed differences of input-output, which hides output pins changes. So I am leaving capture and formatted (raw) input combinations (187498 occurrences, including changing input pins) as an attachment. Every integer represents bit sequence in such manner: PIN1,2,3...9,11,12,...19. According to schematics, PIN 17 and PIN 19 should be inputs, not sure about OE pin.

[alexm1]

hi all im new and i think i cant program my vcds with flash or whatever im not expert on this things but any way that's my vcds and my question can i use it with vcds lite ??
it gives me error message about license and cant check the car with it any more
IMG_1902 (Copy).JPG

If you can get usbasp programmer and read more on this thread you will manage to repair your cable, if not ...make China happy and buy a new one. I did not try to make it worked with vcds lite as long it is suppossed to work with full program. If vcds lite it is enought for you, than buy a simple kkl cable and will do the job for lite version: search kkl or 409 cable.

[xoom]

Made small application that decrypts firmware from "vi si di es"

[heshamzn]

If you can get usbasp programmer and read more on this thread you will manage to repair your cable, if not ...make China happy and buy a new one. I did not try to make it worked with vcds lite as long it is suppossed to work with full program. If vcds lite it is enought for you, than buy a simple kkl cable and will do the job for lite version: search kkl or 409 cable.

I will make my self happy and buy one usbasp programmer do i need to buy any thing else ?

[GianniNOS]

Hi, is possible to repair this cable?

anyone in Italy can repair for me this cable? will contact me in pm please
thanks

[alexm1]

@heshamzn

It is necessary to solder 4 wires coresponding those 4 holes to your pcb. You need to power up your cable with 12v from a power supply or direct from your car-obd2.

[DKa0S]

Both A6 2.5 V6 TDi '01-'04 CAN not ready. Why?

[Mario6]

Because there is no "CAN" only "K".

[DKa0S]

Reading very bad or nothing. Can't access. Dunno! No auto scan?

4 Faults Found:
01441 - Low Fuel Level Sensor (G210)
30-10 - Open or Short to Plus - Intermittent
01441 - Low Fuel Level Sensor (G210)
27-10 - Implausible Signal - Intermittent
18057 - Powertrain Data Bus
P1649 - 35-10 - Missing Message from ABS Controller - Intermittent
00741 - Brake Pedal Monitoring
27-10 - Implausible Signal - Intermittent
Readiness: N/A

3 Faults Found:
01441 - Low Fuel Level Sensor (G210)
30-10 - Open or Short to Plus - Intermittent
01441 - Low Fuel Level Sensor (G210)
27-10 - Implausible Signal - Intermittent
18057 - Powertrain Data Bus
P1649 - 35-10 - Missing Message from ABS Controller - Intermittent
Readiness: N/A

2 Faults Found:
18265 - Load Signal
P1857 - 35-10 - Error Message from ECU - Intermittent
17087 - Brake Switch (F)
P0703 - 35-00 - Electrical Malfunction

49-10 - No Communications - Intermittent

[Mario6]

In newer cars there is a better description of fault codes, frozen frame and others.

http://wiki.ross-tech.com/wiki/index...ry:Fault_Codes

[DKa0S]

If I try to read manually it very hard reading or nothing, no communication or no accsess etc like ABS; Central Elect. In must be read normally?

[Mario6]

Maybe try reflash (update again) Atmega 162 in your cable. I also had problems with connecting in Audi A6 2.5 TDI (2001 and 2003my). I was connecting faster with vag kkl and vcd$ lite 1.2.