36 Special functions outside diagnosis（2）

Tire pressure reset operation:

Check tire pressure: Make sure the tire pressure of all tires is adjusted to the recommended value in the vehicle manual.
Start the vehicle: Insert the car key into the ignition switch and start the car, or press the start button to start.
Find the reset button: On the dashboard or center console under the driver's seat, find the tire pressure reset button, which is usually marked with a tire icon or tire pressure warning light.
Press and hold the reset button: Press and hold the reset button for about 5-10 seconds until the tire pressure warning light starts flashing.
Release the button: After releasing the reset button, the tire pressure warning light will stop flashing or go out, indicating that the reset was successful.
Check the warning light: If the warning light is still on, check the tire pressure to see if it is normal, or try to reset it again.

Models without reset button:

Start the vehicle and enter the "Vehicle Settings" or "Tire Management" menu through the vehicle display.
Select "Tire Pressure Reset" and follow the on-screen instructions to complete the reset.

If your vehicle model has special requirements or operation methods, please provide the vehicle model information and Vdiagtool can provide you with more detailed help.

ABS automatic bleeding is a method of automatically removing air from the brake system through the vehicle's ABS (anti-lock braking system) control module. It is usually used when performing brake system maintenance, changing brake fluid or replacing brake parts. The purpose is to ensure that there is no air residue in the brake fluid system to avoid affecting braking performance.

ABS automatic exhaust operation process:

1.Start the engine: Start the vehicle and keep the engine in idle state. Make sure the brake fluid level is normal and no air has entered the brake system.

2.Connect the diagnostic tool: Connect the OBD-II diagnostic tool to the vehicle's diagnostic interface (usually located under the driver's side dashboard). This tool is used to establish a connection with and control the vehicle's ABS system.

3.Select "ABS Auto Bleed" mode: Enter the "Auto Bleed" mode of the ABS module through the diagnostic tool. This mode will activate the ABS pump and valve to start the automatic bleeding process of the brake fluid.

4.Automatic bleeding process: The system will automatically drive the ABS module to bleed, ensuring that the air in the brake system is completely exhausted. Usually this process will last for several minutes until the system detects that the bleeding is complete.

5.Complete bleeding: After completing the automatic bleeding, the diagnostic tool usually displays a prompt that the operation is completed. At this point, the air in the brake system has been completely removed.

6.Check the brake system: Confirm that there are no abnormalities in the brake system, such as normal brake fluid level, sensitive brake response, and no abnormal noise or bubbles. If the diagnostic tool shows that there is no problem, you can end the operation.

The difference between ABS automatic exhaust and manual exhaust:

Manual exhaust: requires manual operation, usually by stepping on the brake pedal to remove bubbles. This method may be incomplete and easily cause bubbles to remain in the system, affecting the braking effect.
Automatic exhaust: The exhaust process is automatically completed through the OBD-II diagnostic tool and the ABS module. It can ensure that there is no air residue in the brake system, and the exhaust is more thorough and accurate.

Notes:

Brake fluid check: Before performing the ABS automatic bleeding operation, make sure that the brake fluid is sufficient and use high-quality brake fluid suitable for the vehicle.
Diagnostic tool selection: Make sure to use a professional diagnostic tool that supports the ABS system bleeding function, such as Vdiagtool VD70, VdiagtoolVD70S diagnostic equipment.
Operation process monitoring: Monitor the data on the diagnostic tool to ensure that the system completes the bleeding operation without any faults.

Injector coding refers to the process of reprogramming or calibrating the injector parameters through the vehicle's electronic control unit (ECU) when replacing the injector or performing injection system maintenance. This process ensures that the new injector can be correctly matched with the vehicle's engine management system (EMS) to optimize fuel injection volume and fuel efficiency.

The purpose of injector coding:

Precise fuel injection: Different injectors have different injection performance (such as flow rate and injection angle), so the information of the new injector must be transmitted to the ECU to ensure accurate control of the injection amount and avoid improper fuel supply to the engine.
Improve fuel efficiency: Ensure the best working state of the injection system, optimize the accuracy of fuel injection, help reduce fuel consumption and reduce exhaust emissions.
Prevent engine failure: If the injector coding is not performed, the ECU may not be able to recognize the flow and performance of the injector, resulting in uneven injection, which in turn affects the performance of the engine and even causes engine failure.
Reprogramming after maintenance: Injector coding is usually a step performed after the injector is replaced, cleaned or fails to ensure that the injection system is re-matched with the engine's management system

Injector coding operation steps:

Connect the diagnostic tool: Use a professional OBD-II diagnostic tool or injector programming device and connect it to the vehicle's diagnostic interface, usually located below the dashboard on the driver's side.
Select the injector coding function: Select the injector coding or injection system calibration option in the diagnostic tool. The interface of different brands of cars and different types of diagnostic tools may be different, but basically the injector can be programmed through the vehicle ECU control.
Enter the injector information: If a new injector is replaced, the diagnostic tool usually requires the model, flow rate and other information of the injector. Some high-end injectors may have a QR code or barcode for direct scanning and automatic acquisition of the injector parameters.
Perform injector coding: According to the prompts of the diagnostic tool, start the coding process. The system will automatically store the relevant parameters of the injector in the vehicle's ECU and complete the matching of the injector and ECU.
Test and confirm: After the coding is completed, perform an engine test to ensure that the injection system is working properly, the injection amount is accurate, and the engine is running smoothly. The injection parameters and working status can be checked through the diagnostic tool to confirm that the coding is successful.
Complete Coding: After the diagnostic tool shows that the coding is successful, the operation is complete, disconnect the tool and turn off the engine. At this point, the vehicle's fuel injection system has been correctly calibrated and can work normally

Notes:

Select the correct injector model: When replacing the injector, make sure to select the injector model and specifications that match the vehicle. Different models may have different requirements for injectors.
Use professional tools: Injector coding usually requires professional OBD-II diagnostic tools, such as Vdiagtool VD70, Vdiagtool VD70S tools, to ensure the compatibility and accuracy of the equipment.
Record of injector parameters: When replacing the injector, record the parameter information of the new injector to avoid omissions or input errors.
Ensure system stability: After the injector coding is completed, ensure that the engine starts normally and runs stably, and observe whether the fault light is on. If so, check again whether the coding process and the injector match.

Key reset generally refers to the process of resynchronizing or restoring the factory settings of a car remote key (including smart key or remote key). This may be done after the key is faulty, lost, reprogrammed or the battery has been replaced.

Common Problems with Key Reset

Key cannot be reset: If the reset attempt does not work, the key may be damaged or the vehicle system may be faulty. It is recommended to contact a professional repairman for further inspection.
Unable to synchronize the key with the vehicle: If the newly replaced battery does not restore the key to normal operation, it may need to be reprogrammed through the vehicle diagnostic tool.

Resetting after lost keys

If you've lost your car keys, resynchronizing or programming the keys may need to be done by a car dealer or professional mechanic, usually requiring the vehicle's VIN number and identity verification.

Key reset is usually a simple step to resynchronize or program the remote control key, especially in the case of battery replacement, key failure or replacement of new key. If the key cannot be reset according to the above method, it is recommended to contact the vehicle manufacturer or professional technician to ensure correct operation.

Gearbox matching

Transmission Adaptation/Programming is the process of re-matching the transmission with the vehicle's control systems (specifically the engine and transmission control units, ECU and TCU) after the transmission has been replaced, repaired or adjusted. The purpose of transmission matching is to ensure that the new or reconditioned transmission works correctly with the vehicle's other electronic systems to achieve smooth shifting and optimal performance.

Common situations of gearbox matching：

Transmission Replacement: After replacing a new transmission or repairing a transmission, it must be matched to ensure that the transmission can work correctly with other control modules of the vehicle (such as the engine control module ECU).
Transmission Repair or Adjustment: When the transmission is repaired, the fluid is replaced, or the internal parts are replaced, the matching process is also very important to ensure that the adjusted transmission can work seamlessly with the engine system of the car.
Transmission Electronic Module Reset: For some models equipped with electronically controlled transmissions, when the transmission control module (TCU) is reset, matching is required to ensure the coordination of the system.

Transmission matching operation steps:

Step 1: Preparation
Make sure the battery is fully charged: The gearbox matching process takes a long time, so make sure the car battery is fully charged to prevent power outages during the matching process.
Check the gearbox oil level and quality: Before matching, make sure the gearbox oil level is normal and the oil quality is qualified. When changing the gearbox fluid, you also need to match the gearbox.

Step 2: Connect the diagnostic tool

Transmission matching usually requires professional automotive diagnostic tools (such as OBD-II diagnostic equipment) to operate. Commonly used diagnostic tools include：

Vdiagtool VD70, Vdiagtool VD70S car diagnostic equipment.
Vehicle-specific tools, such as Mercedes-Benz, BMW, Audi and other brands usually require the use of special diagnostic equipment.

Step 3: Transmission adaptation or matching

According to the instructions of the diagnostic tool, select the transmission matching or adaptation program. The matching steps for different models may be different. Common matching processes include:

Automatic adaptation mode: The diagnostic tool will automatically identify the parameters between the transmission and the vehicle control system and adjust the matching to adapt to the current transmission characteristics.
Manual matching procedure: According to the instructions in the vehicle manual, sometimes some parameters (such as transmission type, model, etc.) need to be manually entered to complete the matching.

Step 4: Testing and Verification