Look here: Skoda Octavia I 1.6L (Simos 3.3) Chip Tuning
The VAG diagnostic tool is connected ...
Both these and other bugs are known problems of these motors. Therefore, it was decided that the second, with further manifestation, we will solve the traditional method. And from the malfunction of the Secondary Air System (SVB), we will get rid of once and for all, firmware with a decrease in the toxicity standards to EURO2 and the physical removal of unnecessary elements of the system after reflashing.
So, the firmware from ADS ADACT was chosen:
It remains to find where the engine ECU is located and change the program in it. We open ELSA ...
The engine control unit of this car is behind the waterproof casing, in the area of 窶銀€逆he windshield wiper.
We begin disassembly ...
... unscrew the wipers, remove the protective cover and before us the motor ...
As we used to say " VAG-COM" and ELSA pages , the engine control unit, in this car, Simens Simos 3.3 ...
Inside the block percent: Infineon SAK-C167CR-LM and flash: AM29F400BB .
Judging by the forums, Combiloader works fine with this block in BSL mode. We find Boot pin , this is the 104th processor leg (in the help to Combiloader 'y have information) ...
Now we need to understand the power supply of the unit and the diagnostic line ...
Pinout of Siemens Simos 3.3 control unit connectors - Download (format * .pdf)
Again look in the ELSA ...
Power + 12V - 3rd pin in a large connector, mass - 1st pin in a large connector and to-line diagnostics - 17th pin in the same connector.
We try to read the firmware in the BSL mode, the C16x (+ T) module is unsuccessful.
Try to read the firmware in the BSL-mode, the C16x module ...
... the operation was completed successfully.
What and where can I see in the firmware of the Simos 3.3 ...
Download the necessary us, the modified firmware and "pour" it into the ECU.
The recording is complete, we collect the block and put it in place.