ACT V2 Coding Tool Solve BSI-Q0X-00 Module Decryption and EEPROM Reading/Writing Technology

As automotive electronic technology continues to evolve, the BSI (Body Control Module) has become an increasingly important core controller in vehicles, handling a wide range of functions. However, in practical repair and technical debugging, the decryption and EEPROM reading/writing of BSI modules remain challenging for technicians. This article will introduce in detail for everyone the method of decrypting the BSI-Q0X-00 module using the ALicar ACT V2 tool, including the key steps of SC667050+95256 EEPROM 95256 reading and writing, BSI separation technology, as well as data calculation and system preparation.

Structure of the BSI Module and EEPROM Reading/Writing

The BSI-Q0X-00 module, produced by Continental, is a commonly used body control module applied in various vehicles. This module contains an EEPROM (Electrically Erasable Programmable Read-Only Memory) that stores critical system data, including the Vehicle Identification Number (VIN), mileage, PIN code, KEY system data, and more.

What is EEPROM?

EEPROM is a type of memory that can be read and written multiple times, widely used in automotive electronic systems to store key parameters and system data. In BSI modules, EEPROM reading and writing operations require specific interfaces and tools.

BSI Module Separation and EEPROM Reading/Writing Precautions

In practical operations, separating the BSI module is a critical step that requires careful attention to the following points:

Preparations Before Separation

1. Softening Insulation Coating: Before separating the BSI module, it is recommended to soften the insulation coating on the circuit board to avoid component damage caused by adhesive leaks.
2. Preventing Solder Damage: During the separation process, operate slowly and carefully to avoid damaging solder joints and circuit board tracks.

Separation Process

• Use professional tools to separate the upper circuit board of the BSI module.
• Protect sensitive components on the circuit board, especially BGA (Ball Grid Array) chips.

Data Calculation and System Preparation

After completing the separation of the BSI module and EEPROM reading/writing, data calculation and system preparation are the key steps for subsequent operations.

Mileage Calculation

1. Reading Raw Data: Use professional tools to read the raw mileage data from the EEPROM (e.g., 00 00 74 23).
2. Data Processing: Perform an XOR operation on the raw data (e.g., 00 00 74 23 XOR FF FF FF FF = 8B DC).
3. Data Conversion: Convert the processed data to its decimal form to obtain the actual mileage (e.g., 8B DC represents 2,974 kilometers).

DTC (Diagnostic Trouble Code) Clearing

• Clearing History: Clear the historical fault codes by setting the first area to zero and filling the second area with FF.
• Reading Current DTCs: After clearing the history, read the current DTC data.

"Virgin" Process for BSI Modules

When applying the BSI module to another vehicle, it is necessary to perform a "Virgin" process to clear the original data and adapt the module to the new vehicle's system.

Steps for Virginization

1. Clearing VIN: Set the 17 HEX storage units related to VIN to FF.
2. Clearing PIN: Set the 4 HEX storage units related to PIN to FF.
3. Clearing Mileage: Clear mileage data using the method described above.
4. Clearing Event History: Clear all historical event data to ensure the BSI module is in a "blank" state.

Summary

By following the steps outlined above, technicians can successfully decrypt and read/write the BSI-Q0X-00 module. Whether modifying mileage, clearing fault codes, or performing the "Virgin" process, strict adherence to technical specifications is essential to avoid damaging the module or the vehicle's system. We hope this article has been helpful!