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Yanhua ACDP2 Fixed BMW BDC2 System Abnormal and Coding Lost Issues

Posted on June 25, 2025 by
yanhua-acdp-fix-bmw-bdc2-abnormal-12

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Problem:

When I used Yanhua Mini ACDP/ACDP2 with Module 38 to add new key to BMW G chassis BDC2 module, the vehicle info identified are shown below:

System version: unkn_00000000_000.000.000
System status: Abnormal
Coding status: Lost
Whether support IMMO: Need update

What is the problem? How to solve it?

yanhua-acdp-fix-bmw-bdc2-abnormal-1

Possible causes:

The device power outage, disconnection or other anomalies occur during obtaining keys data.

The solution:

Use the “Programming restore system” function to restore functionality.

Repair Process

Connect ACDP2/ACDP, Module 38 ICP Interface Board and BDC2 module correctly

yanhua-acdp-fix-bmw-bdc2-abnormal-2

Select “Programming Restore System”

yanhua-acdp-fix-bmw-bdc2-abnormal-3

Choose “Step 2: Update BDC2 System”

yanhua-acdp-fix-bmw-bdc2-abnormal-4

System auto-detects: original version (e.g., 108.020.020)

yanhua-acdp-fix-bmw-bdc2-abnormal-5 yanhua-acdp-fix-bmw-bdc2-abnormal-6

Critical Requirements:

Stable internet connection
Uninterrupted power supply

yanhua-acdp-fix-bmw-bdc2-abnormal-7 yanhua-acdp-fix-bmw-bdc2-abnormal-8

Progress screen appears

yanhua-acdp-fix-bmw-bdc2-abnormal-9

DO NOT disconnect during this phase

Click OK to proceed

Select “Step 3: Write Coding Data”

Verify coding.bin file’s timestamp and VIN info

yanhua-acdp-fix-bmw-bdc2-abnormal-10

Confirm successful write

yanhua-acdp-fix-bmw-bdc2-abnormal-11

Finally, identify vehicle info. again

Check system & coding status

Normal display = Repair complete

yanhua-acdp-fix-bmw-bdc2-abnormal-12

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