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Professional 909 User Manual
9. FAQ
Here we list some frequently asked questions and answers related to this tool.
1
System halts when reading data stream. What is the reason?
It may be caused by a slackened connector. Please turn this tool off, firmly
connect the connector, and switch it on again.
2
Screen of main unit flashes at engine ignition start.
Caused by electromagnetic disturbing, and this is normal phenomenon.
3
There is no response when communicating with on-board computer.
Please confirm the proper voltage of power supply and check if the throttle
has been closed, the transmission is in the neutral position, and the water is in
proper temperature.
4
What to do if the system fails to start auto VIN detection?
Please check the following possible reasons:
• Whether the tool is properly connected to the vehicle’s DLC.
• Whether the “Automatic detection on Connect” switch is OFF. If yes, slide it to
ON.
5
Why are there so many fault codes?
Usually, it’s caused by poor connection or fault circuit grounding.
6
How to upgrade the system software?
1. Switch the tool on and ensure a stable internet connection.
2. Tap “Setting” on the Job Menu, select “About” -> “Version”, and tap “Detect the
System Version” to enter the system upgrading page.
3. Follow the on-screen instructions step by step to finish the process. It may
take several minutes depending on the internet speed, please be patient. After
upgrade is successfully finished, the tool will automatically restart and enters
the Job menu.
