One customer gave feedback that he could use CG FC200 to read both pflash and dflash on a used VAG MED17.5 ECU without opening ECU covers, but he didn’t know how to turn the immo off to start car. If you also have this problem, follow today’s article to check the guide.
This is a VAG MED17.5 ECU.
The Pinout diagram to FC200:
Red=12V
Black= GND
Yellow= CAN-L
Green= CAN-H
Brown= GPT-0
Purple= GPT-1
Use the FC200 harness to connect CG FC200 ECU programmer and MED17.5 ECU correctly
Supply power to device and connect to a computer via USB cable
Step 1.Full backup DFlash and PFlash data
Run FC200 software, select Volkswagen (VW)>> BOSCH MED17.5 TC1766>> Platform
Identify the ECU chip info first, and start to read DFlash and PFlash in sequence, save both data after reading.
Step 2.Do IMMO OFF and checksum correction with IMMOFF17 Program
After opening IMMOFF17 software, click “EEPROM + IMMO OFF + CHECKSUM CORRECTION”
Select the original PFlash and DFlash data just saved in step 1 to do immo off and correct checksum separately
DFlash immo off and checksum correction are OK
PFlash immo off is ok, but failed to correct checksum.
Step 3.Compare the original data and IMMO off data
Use HexCmp software to compare the original DFlash data and DFlash IMMO checksum data, PFlash data and PFlash IMMO data, there are some differences in DFlash data, but it’s hard to see the difference on the Pflash files because only two little parts are changed.
Use Hexworkshop to compare the two PFlash files easily. There is only a little difference.
Step 4.Clone ECU with CG FC-200
Back to CG FC200 software, identify the ECU first, and click “ECU Clone” function
Follow the prompt to select the PFlash IMMO file (checksum is not ok)
The software pops up a message “file verification error…”, and we need to confirm to correct checksum automatically.
It starts correcting checksum, erasing and writing the data…
Clone ECU successfully.
CG FC-200 ECU Programmer made IMMO OFF and checksum correction on VAG MED17.5 ECU successfully.
