Hyundai ME17.9.1 ECU IMMO OFF by Xhorse Multi Prog

 Immobilizer deactivation (Immo Off) is a common procedure for Hyundai and Kia vehicles with the ME 17.9.1 ECU, often required after ECU repairs, key loss, or engine swaps. This guide outlines key steps and considerations.

Here we will show how to do Hyundai ME17.9.1 ECU immo off with xhorse multi prog programmer.

Select Kia Bosch ME17.9.1 ECU.

Check wiring diagram.

Connect ECU with multi prog.

Read and save int eeprom.

Read and save flash data.

Go to Tool tab- Turn off immo.
Select Hyundai-Elantra-ME17.9.11. Load original flash data.

Hit Turn off the immo.

Generate immo off file and save.

Load immo off file and write data to ECU with multiprog.

Verify checksum correction.

Write immo off data successfully.

IMMO OFF is done.

Xhorse Multi Prog read VW EDC17C46 ECU in Boot

 EXPERIENCE with EDC17C46, Xhorse Multi Prog, tuning files & BOOT recovery.

Tested a few tuning files (Stage 1 + EGR/DPF OFF) on a VW Tiguan Bosch EDC17C46 ECU.
To avoid any risk to the original unit, he intentionally cloned the original ECU just for testing, using VVDI2 for IMMO and MultiProg for EEPROM and FLASH read/write.
Here’s how it went:
Cloning worked perfectly – ECU booted with no issues.
Reading/writing via BENCH mode with MultiProg worked fine at first.
But when I tried flashing a tuned file, writing stopped at 34–37%.
Tried a professional file from Autotuner – exact same issue (stuck at same %).
Finally, he restored the ECU via BOOT mode (Tricore BSL) – flashed the original, and ECU came back to life.

Conclusion:
VVDI2 + MultiProg is a great combo for cloning (IMMO + PFlash)
Files from tuning platforms like Autotuner may not be compatible with MultiProg when flashing via BENCH.
If flashing stops at the same %, it’s very likely a file structure issue, not your tool.
BOOT mode with MultiProg saved the day – full recovery worked.

VW Passat B8 EDC17C74 ECU IMMO OFF with Xhorse Multi Prog

Here we will show how to read, write and disable the immobilizer (IMMO off) on the VW Passat B8 Bosch EDC17C74 ECU using the Xhorse Multi Prog programmer.

Quick search EDC17C74 ECU. Check wiring diagram and connect ECU with multi prog via ECU adapter.

Read int flash and save data.

Read INT eeprom and save.

Go to Tool tab- Turn off the IMMO function.

Load int eeprom we have backed up.

Hit Turn off the IMMO.

Generate IMMO OFF file successfully. Save immo off file.

You can also compare the original eeprom and immo off eeprom data.

Write the IMMO OFF data back to the eeprom with multi prog.

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Xhorse Multi Prog Read VAG Continental Simos 11.1 ECU

 Xhorse Multi Prog read VAG Continental Simos 11.1 ECU in boot mode successfully.

In multi prog software, select VAG Continental Simos 11.1 ECU.

Check boot mode wiring diagram.

Connect ECU with mcu adapter.

Read INT flash and save.

Read INT eeprom and save.

Xhorse Multi Prog Read Skoda Fabia Simos PCR 2.1 on Bench

 How to read Skoda Fabia Simos PCR 2.1 ECU with Xhorse Multi Prog programmer on bench mode.

Reading the Simos PCR 2.1 ECU

Step 1: Selecting the ECU

• Navigate to the ECU section in the software and search for Skoda Fabia.

• Select the Simos PCR 2.1 (a Continental ECU) from the list.

Step 2: Pinout Connections

• Refer to the pinout diagram provided in the software.

• Use the included ECU adapter and circular connectors to link the Multiprog to the ECU.

• Ensure all connections are secure before proceeding.

Step 3: Read Internal Flash Data

• Click “Read” to begin the Flash reading process.

• The tool communicates with the ECU, displaying progress in real-time.

• The internal flash read takes approximately 5 minutes and 18 seconds.

• Save flash data.

Step 4: Read EEPROM Data

• The external EEROM read is faster at 43 seconds.
• Save the eeprom data.

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