OBDSTAR X300 Classic G3 Startup Failure Repair Guide

If your OBDSTRA X300 Classic G3 device won't start, don't worry! Follow this step-by-step guide to troubleshoot and fix the issue by checking key components like the battery, U17 chip, and L8 inductor.

Tools Required

Screwdriver (hex-compatible)

Multimeter

Soldering iron or hot air gun (temperature adjustable)

Replacement components: U17 (IC) and L8 (1µH inductor)

Step 1: Remove the rubber case. Then, use a screwdriver to loosen and remove the fixed hex screws.

Step 2: Open the back cover, press down on the battery connector clip with your hand, and then pull out the battery connector.

Step 3: Use a multimeter set to the ohms range to test the two ends of capacitor C75. If the resistance is around 0Ω, it indicates that U17 and L8 are damaged and are causing a short circuit. Replace U17 and L8.

Step 4: Use a soldering iron or hot air gun set to 350 ± 10°C to desolder and remove U17 and L8. (Replace L8 with a 1uH inductor.)

Step 5: After the replacement, use the multimeter set to the ohms range to test the two ends of capacitor C75 again. If the resistance is approximately 1.36KΩ, it confirms that U17 and L8 have been successfully replaced.

Step 6: Insert the battery connector, reassemble the back cover, and press the power button to turn on the device. If it starts up normally, the replacement is successful.

Step 7: Use a screwdriver to fasten the screws to the back cover, and put the rubber case back on. The replacement is complete!

This guide resolves short-circuit issues caused by faulty U17 and L8, restoring normal operation to the X300 Classic G3.

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GM HMI Module VIN Reset by OBDSTAR X300 Classic G3

This guide will walk you through resetting the VIN (Vehicle Identification Number) on a GM HMI 2.0/2.5 module using the OBDSTAR X300 Classic G3 device.

Step-by-Step VIN Reset Procedure:

1. Enter ECU Advanced Mode

On the main screen of the device, tap:

[ECU Advanced] >> [GM/OPEL] >> [GM/OPEL V30.04] >> [OPEL] >> [HMI2.0/2.5]

Then tap on [Guide] to read the connection and operation instructions carefully.

2. Read ECU Information

Select [ECU info.] to retrieve the current information stored in the HMI module, including the existing VIN.

3. Reset VIN

Choose the Reset VIN function from the menu.

The tool will process the request, and once complete, you should see a confirmation message: “Reset VIN Success.”

4. Confirm the VIN Reset

Return to [ECU info.] and re-read the data to verify that the VIN has been successfully cleared or modified.

Tips:

Always ensure your device software is updated to the latest version before starting.

It's recommended to back up any important data before making changes.

Use a proper power supply to avoid unexpected interruption during operation.

Using OBDSTAR X300 Classic G3, you can successfully reset the VIN on a GM HMI module with just a few simple steps.

Video guides:

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