POLO 6N ECU IMMO QUESTION PLEASE.

[nazz2]

Hi guys
I had never had so much trouble with an old car, the car is 1 or 1.1 litter engine, 6n chassis,1998, with 42 id transponder.

This was a lost key, with tms mcu, the dump is recognised by tmpro and zbull, after the soldering, a 42 transponder was produced by original zbull,the car starts,then stops.

Took the mcu out, recheck and soldered back, still the same.i dont get any comms with autodiagnose, and any other key programmer,even after leaving the ignition on for 35 minutes.

Now the question is the original ecu is bosch 030 906 027 E and the immo is siemens, with tms chip, i found a complete set on ebay which is bosch 030 906 027 AB, and same immobiliser number, all plugs are same size, but this came from a 1.4 ,automatic, same 6n chassis, would this work without any modification?

I d like to know the cause why this didnt start in the first place, Thanks for reading.

[tqnata83]

post dump tms for pin and program new key TP08 with VCDS or AVDI

[pouleddy]

i dont get any comms with autodiagnose,<<<what did you mean? you mean can't inter to immobox by your scan tool or there is no fault in your immo system after solder back the MCU?. try clean well the board of immo box & the mcu legs and solder well,after finish soldering clean well by carburetor cleaner the board.be careful when soldering if the air is very high u loos any elec components around of mcu.
you can use emulator if it in urgent.

[nazz2]

Hi
Yes autodiagnose is a diagnostic scanner, i tried autodiagnose, vcds,avdi,ad100 pro,sbb,x100,vag tacho 3.1. i cant get any comms, the thing is i desoldered this chip twice, and as far as i know, it is soldered ok, and no component is missing, is there a immo off solution for this ecu? it has 44 pin, one big plug, does anyone know what the letters/difference AB and E at the end of the ecu type mean? Regards

ps, i have the immo pin from the dump.

[nazz2]

Well i just removed the mcu and data still ok, and soldering almost perfect, but i noticed from the blow up picture on zbull, theres a resistor missing.!!! its to the left of the mcu,almost top(by the second and 3rd leg), between the top edge of the crystall , (looking down on the mcu,going anti clockwise, next to the texas instrument badge)),does any one know what value it is?

[pouleddy]

ok,dose are the pic which you mean?

[nazz2]

Hi, yes well done, whats the value of it mate?is it the one in the picture? Thanks

[pouleddy]

yes,the one in the picture ( .675 ohm ) is the value

[Tefocm]

Here is a solution to your problem, but first let me guess what happened: The original key is there, but the car wont start? Thats because there is nothing wrong with the key, its only that synchronisation between the Immo and ECU has been lost. Write the two dumps im about to give you on both the ECU and the Immo, then use Zed-Bull to produce a key from Immo dump...If you want you can give me half the cash you were going to spend on EBay ;-)
Here is your solution: 263562

[nazz2]

Thanks pouleddy, i will post the results later.
Tefocm, this is a lost key, i dont think the sync gets lost when you read the tms chip, but thanks any way, Regards

[raptureready]

could I perhaps get the pass tefocm as I think your set would of helped me in the past and would definitely help me in the future:joyous:
hope u get it sorted nazz2

[obdsystems]

ok,dose are the pic which you mean?

its probably just a decoupling capacitor if near processor

[nazz2]

Hi chaps, i bought a matched set from ebay, with the above ecu+immo numbers, pouleddy was correct, it was exactly as in the picture, however i could not find any .675 resistor any where, the closest that i found, it was .475, but the car was same,start and stop.

Fitted the matched set, and the car started,although it came from a 1.4 engine(mine was 1.1 or 1 litter engine), still not sure what went wrong.!!

[Tefocm]

Nazz if come across that problem twice...and the solution above helped. But glad to know you managed to solve your problem.

[obdsystems]

.675 or .475 resistors ????

Nothing exists - your measuring total resistance between + and Gnd with multimeter /10.

If this missing component was near CPU then its a capacitor or very small resistor round crystal. Both of which are not (likely!!) the problem as you found !!

Good to know you fixed it tho :)