8/15/2025

CG FC200 Hyundai MEG17.9.2 ECU IMMO OFF

How to do latest Hyundai/Kia MEG17.9.2 ECU IMMO OFF? Here takes CG FC200 as an example.

1. Read the ECU Data.

Run FC200 Software. Select Bosch MEG17.9.2 ECU for Hyundai.

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Check boot mode wiring diargam. Have to connect 2 GPT-0 and 1 GPT-1 boot pin.

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Connect FC200 with ECU according to the wiring diagram.

Identify ECU.

Read password.

If failed to read password automatically. Select type as Kia/Hyundai/Honda/Suzuki TPROT8+.

Because diffrent ECUs have different ways to obtain the password.CG FC200 Hyundai MEG17.9.2 ECU IMMO OFF 3

Read and save password.

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Read password successfully.

Now start reading Dflash.

Read Dflash and save.

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Read and save Pflash.

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2. Modify the original Pflash data to disable IMMO

Use a hex editor or specialized tuning software (e.g., WinOLS, ECU Titanium, IMMO Doctor etc).

Locate immobilizer-related (here upload Pflash) data and disable or remove it.

This can involve:

Removing or zeroing the immobilizer code.

Adjusting specific flags or checksum values.

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3. Write the modified file back to the ECU
Use the same tool (CG FC200) you used to read.

Flash the IMMO OFF file back to the ECU..

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Hit Yes to verify the file.

FC200 asks password to write file.

Select Password or original file loading and upload password file we read in step 1.

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Write immo off file until completed.

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