36 Special functions outside diagnosis(5)

An EEPROM Adapter is a tool used to communicate and read/write with an EEPROM memory chip in an electronic control unit (ECU) or other vehicle electronic systems. EEPROM (Electrically Erasable Programmable Read-Only Memory) is a non-volatile memory widely used in automotive electronic systems to store key information such as vehicle configuration data, parameter settings, calibration data, etc.

How to use the EEPROM adapter:

Using an EEPROM adapter usually requires a specialized automotive diagnostic tool such as Vdiagtool VD70 or VD70S, which is able to communicate with the EEPROM chip to perform read, write or recovery operations.

1. Connect the adapter:

  • Connect the EEPROM adapter to the vehicle's OBD-II port or directly to the vehicle's ECU (the specific connection method varies depending on the design of the adapter and tool).

2.Launch the diagnostic tool:

  • Using a diagnostic tool such as Vdiagtool VD70 or VD70S, select the vehicle make and model and enter the Electronic Control Unit (ECU) Management or EEPROM Operation menu.

3.Read EEPROM data:

  • Select the Read EEPROM Data option in the tool menu and the tool will extract data from the onboard EEPROM. You can choose to back up the data or directly analyze the stored data.

4.Modify and write data:

  • If you need to modify the data in the EEPROM, you can enter new parameter settings through the tool, modify and save. After completion, click Write Data to write the new information to the EEPROM.

5.Verification and calibration:

  • After writing new data, it is usually necessary to restart the vehicle or perform system calibration to ensure that the modified data is correctly recognized and applied. The data in the EEPROM can be read and verified again by the diagnostic tool to see if it is correct.

6.Failure recovery:

  • If the EEPROM data is lost or corrupted, the tool usually provides a recovery option. By selecting the appropriate backup file, the EEPROM data can be restored to ensure that the vehicle's control system returns to normal.

The EEPROM adapter is an important tool for reading, writing and restoring vehicle electronic system data, and is widely used in automobile maintenance, programming and modification. It can help technicians read and modify the vehicle's configuration, calibration data, key information, etc., to improve maintenance efficiency and accuracy. When using it, you need to ensure that the adapter is compatible with the vehicle ECU and strictly follow the operating procedures to avoid vehicle system failures due to improper operation.

Coolant Bleeding / Coolant Air Bleeding refers to the process of removing excess air from the car's cooling system to ensure smooth coolant flow and prevent idling or bubbles from clogging the circulation system. This process is usually performed when replacing the coolant, repairing cooling system components (such as water pumps, radiators), or repairing coolant pipes.

The car's cooling system mainly relies on coolant to remove the heat generated by the engine. The coolant flows between the engine and the radiator through the water pump, but when replacing or repairing the cooling system, air may enter the coolant circuit, affecting the cooling effect and may even cause the engine to overheat. Therefore, coolant bleeding is a key step to ensure that the system works properly.

Use special tools (automatic exhaust system)

Modern vehicles often have an automatic bleeding system in their cooling system. These systems are usually equipped with a special bleeding pump or bleeding device that can automatically drain excess air. For this type of vehicle, you can use an OBD-II diagnostic tool (such as Vdiagtool VD70 or VD70S) to perform the coolant drain operation.

To drain the coolant using this tool:

1.Connection Diagnostics Tool:

  • Connect the Vdiagtool VD70 or VD70S diagnostic tool to the vehicle's OBD-II port.

2.To access the coolant bleed function:

  • Start the diagnostic tool, select your vehicle make and model and go to Cooling System or Engine Management. Look for the Coolant Drain or Bleed function in the menu.

3.To perform automatic exhaust:

  • Follow the instructions of the diagnostic tool to perform the coolant bleeding process. The tool will control the system to automatically start the bleeding pump or related functions to help bleed air from the system.

4.Check the fluid level:

  • After completing the bleeding operation, check the coolant level to ensure that it is normal and start the engine again to ensure that the air in the system is completely purged.

Coolant draining is an important step in maintaining the vehicle's cooling system to ensure smooth coolant circulation and prevent engine overheating. Manual operation, automatic bleeding system or professional diagnostic tools (such as Vdiagtool VD70 or VD70S) can effectively drain the air in the cooling system to ensure that the engine runs stably at normal temperature.

 

 Remove speed limit

Speed ​​Limit Removal refers to removing or modifying the maximum speed limit preset by the manufacturer by adjusting the parameters of the vehicle's electronic control unit (ECU) or other on-board systems. This process is usually used for vehicles or models with special needs, or when performing certain vehicle adjustments. However, it should be noted that removing the speed limit is illegal in many countries or regions and may cause driving safety issues. Therefore, when performing such operations, car owners should understand local laws and regulations and operate with caution.

Common ways to remove speed limits:

1.Unlock the speed limit with a diagnostic tool (e.g. Vdiagtool VD70 or VD70S):

Using a professional car diagnostic tool (such as Vdiagtool VD70 or VD70S), you can modify the vehicle's speed limit settings by connecting to the vehicle's electronic control unit (ECU). Here is the general operation process:

step:

  • Connecting the diagnostic tool: Connect the Vdiagtool VD70 or VD70S diagnostic tool to the vehicle's OBD-II port.
  • Select Vehicle Make and Model: Launch the diagnostic tool and select the vehicle make and model to access the vehicle's ECU setup.
  • Find and modify the speed limit settings: Find the "Speed ​​Limit" or "Maximum Speed ​​Limit" option in the diagnostic tool's menu. Modify the speed limit parameters as needed to remove or increase the speed limit.
  • Save settings and verify: After completing the settings, save the changes and restart the vehicle. Check whether the speed limit has been lifted from the vehicle dashboard and conduct a real-life test.

The speed limit is usually lifted to improve vehicle performance or to meet specific needs, but factors such as legality, safety, and warranty need to be carefully considered when doing this. The vehicle's speed limit settings can be easily modified through professional diagnostic tools such as