What is “Unlock DME” for Yanhua ACDP BMW BDC2 All Keys Lost?

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There is an “Unlock DME” option in the Yanhua ACDP APP for BMW G series BDC2 all keys lost.

Some customers are curious about what this function is and how to use it.

Check the detailed introduction with Q&A.

Q1: What does “Unlock DME” mean? Does it apply to engine ECUs (DMEs) blocked after October 2020?

A: “Unlock DME” allows you to rewrite immobilizer data to a locked engine control unit (DME).

If you have a second-hand DME, this function lets you prepare it for installation in another vehicle by removing immobilizer restrictions.

Q2: Does the “Unlock DME” require BMW BDC2 AKL Test Platform license?

A: Yes, requires A504 license activation in ACDP.

Q3: Which engine models is this function used for?

A: The “Unlock DME” function is available for B48/B58 engines (F chassis and G chassis) that can read engine EEPROM data by Yanhua Mini ACDP/ACDP2.

Q4: Does this function use OBD or bench mode?

A: It’s done via OBD.

Q5: How to use “Unlock DME”?

1.Read & save EEPROM data from the original DME first.

2.Use Module 3 + B48 interface board in bench mode to read B48 EEPROM data

3.Select “Unlock DME” function

4.Plug ACDP into the OBD-II port of the BMW car

Upload the backup EEPROM data

Follow on-screen prompts to complete the unlock process.

Q6: When I click the “Unlock DME” function and it appears “The Application file size is less than 100kb”, what does it mean?

A: The issue may occur because the all-keys-lost application hasn’t been successfully uploaded to the server. It will be solved by Yanhua Tech, just stay tuned!

Read also:

Yanhua ACDP2 Program BMW G Chassis BDC2 All Keys Lost on Bench

Yanhua ACDP2 Fixed BMW BDC2 System Abnormal and Coding Lost Issues

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