This function is dedicated for reading the PIN/CS/MAC of the Simos PCR 2.1 engine control units.

The procedure of reading the Simos PCR engine control unit consist of 3 steps: a) Unlocking the engine control unit.

These engine control units is possible to be read, only after the EEPROM is unlocked to the so called “developer mode”. These engine control units can be unlocked in two ways – by reading/writing the EEPROM with a programmer, or using boot-mode. The disadvantage of the reading/writing the EEPROM with a programmer, is that the EEPROM is found on the bottom side of the ECU and need to dismount the whole ECU shell, while the connection to the bootmode is much easier.

Unlocking of the EEPROM is made as follows

• EEPROM (95640) is read with a programmer.

• With the button “Generate UNLOCKED Simos ConfData dump (95640) you generate a new dump

• Write this modified dump with a programmer.

Once the dump is written, the ECU is unlocked and you can continue with the procedure.

Unlocking through the boot-mode is made as follows

• Connect the ECU as shown on the wiring diagram.

Press “Lock/Unlock by boot-mode” button. If it is not possible to connect to the ECU, please try to make power-off/power-on of the ECU and try again

If the operation was successful, you can continue with the procedure.

With the button “Check ECU status” you can verify whether it is unlocked or not. If it is unlocked, then “ECU is unlocked and now can be prepared for reading” will become active. If the PIN/CS of the ECU was already read of the past and no additional preparation is required, then “ECU is already unlocked and prepared for reading” will be active.

NOTE: The customer has the ability to modify the automatic selection. This is so because the customer might want to update the ECU to another firmware than the original.

b) Prepare the ECU for reading. This is made by update of the SW of the ECU. For that reason the customer has to select the SW version to which he wants to update. The software has internal database of available software versions, from which the customer has to select. In the most cases the appropriate software is automatically selected. If it is not automatically selected, the customer has to select it manually.

NOTE: Selecting software with different VAG number than the current is useful only if you want to readapt the ECU to another vehicle. In this case update the ECU to a software with the same VAG number as the old ECU of the car, where you will put the new ECU. In all other cases it is recommended not to change the VAG number. If the VAG number to which you will update is the same as the original, but only the software version is different, then this is not a problem.

c) Once the engine control unit is prepared, the ECU can be read by OBDII. Once it is prepared, it is possible to proceed directly to the last step. It is also possible to read the PIN/CS/MAC from the “Immo parts adaptation” and “Engine control unit” special functions. But unlocking and preparing for reading can be made only from the “Simos PCR2.1” special function.