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Anzelmas
2nd April, 2021, 05:01 PM
Hi, m8s!
I have Audi A8 4.2 1995 without keys in my garage.
I have ordered a new key from dealer. Have read the dump from white immo box, calculated the PIN. There was impossible to pair key with VCDS and FVDI, because the communication session was always breaking. So I have made a new chip with EFfI. But the car still not starting.
I can delete the fault codes in engine CU and immo box, the immo lamp stops blinking after that, but after an attempt to start the car the immo lamp starts to blink again and I have the fault codes in engine CU "Engine start is blocked" and in Immo box "Key is not authorized".
I tried to pair the engine CU to Immo box, but it didn't accept the PIN.
Maybe I have calculated not good PIN. Can somebody check, please?
I expected to read out the PIN from engine ECU, but I think that there is no PIN in this ECU. ECU is Jetronic/ Motronic M5.4 4D0907557E Bosch 0261203609/610 with TMS-12FNT on board.
I got PIN 00671

pioneer427
2nd April, 2021, 05:12 PM
pin 00671 correct
problem in the connector immobox
You need to solder pins antenna

Anzelmas
2nd April, 2021, 05:34 PM
You mean the pins on Immo box PCB or on antenna?

pioneer427
2nd April, 2021, 06:00 PM
Immobox connector

Anzelmas
2nd April, 2021, 06:07 PM
I will try tomorrow, although I have checked with a magnifying glass and they looked OK.

Anzelmas
7th April, 2021, 01:57 PM
I have resoldered the connector but it didn't helped. Any other ideas?

pioneer427
7th April, 2021, 08:17 PM
Check resistance coil in immobox connector
22 Ohm
Check activity coil
Transponder megamos13?

Anzelmas
1st July, 2021, 06:46 PM
I want to refresh this post.
There is no way I can start this car normally. So I want to do Immo Off. Is it possible?
ECU is:
Bosch Jetronic/Motronoc M5.4
0261203609/610
4D0907557E
I think there is EEPROM 27C1024 on board (not sure).

lundal
25th February, 2023, 02:36 PM
fandt du nogensinde en løsning , / did you find a solution ?