How to Solve the Problem for GM MDI

There have many situations cant use GM MDI , when you have some troubles to use the tool ,  you should reboot the MDI software and do the Self Test first . Please check the bellowing 4 issues for GM MDI :


If you meet this problem, it indicates that there is an internal problem in the MDI, you need to connect the MDI to a PC by using the USB and do the software recovery procedure or you can contact your local customer support center for help.



This condition indicates that during power on, there has detected a problem. And the solution is to power down the MDI and verify that it has the same problem after you power up again, then connect the MDI to a PC by using the USB and do the software recovery process. Ask your local customer support center is ok.



Normally speaking, Once the external power is applied,the MDI should power up. If the MDI from CnAutotool does not turn on, the first thing you need to do is to check the wall plug or power cable connections. Then try to supply power to the MDI from the two different power sources, the vehicle DLC connector and the AC 12-volt Adapter.


To solve this problem, you need to check and make sure that the cables are all attached to the MDI securely and the connector pins are all clean. If you are going to connect to the vehicle DLC connector, try to power from the AC 12-volt Adapter. And if you are going to connect to the AC 12-volt Adapter, you should try to power from the vehicle DLC connector. If your MDI still can’t power up, then you may have a problem with your MDI, you’d better contact with your local support center.



Actually, after it is disconnected form the vehicle, the automotive scan tool MDI should stay on for a factory set time unless you press the power button. If the MDI turns off immediately once you disconnected it from the vehicle, you should power up the MDI and verify that it has the same problem when the power is removed, then replace the batteries and make sure they are properly installed. After these operation, if it still fails to be off correctly, your MDI may be damaged.


Any other issures for GM MDI Diagnostic Tool , welcome to contact us for technical support any time

Thank you

GM MDI software has updated to V2017.09 and “No Connection” error solved

1.Software update

1). Our GM MDI software has updated to V2017.09.It can support 2010-2017.09 year new cars.

2). If you think installation procedure is difficult for you,you can choose the GM MDI with Lenovo E49AL laptop,GM MDI software will be preinstalled in the Lenovo E49AL Laptop ,you can use it directly after receiving it.


2.“No Connection” error solved

Here is the detail explanation of GM MDI WIFI multiple diagnostic system “no connection” error and solution.


When get the GM MDI tool from connected with computer and plugged into car’s DLC OBD port, only two of the indicator light flashed while the other two are off. And then the GM MDI software system displayed “no connection” error message. See Fig.1 and Fig. 2.


Possible reason:
Improper operation procedure leads to the communication failure.


Quit the GM MDI software and disconnect the GM MDI main unit
Open MDI Manager to check the driver
Open “Network setup” to check the network condition
If your MDI Manager shows a connection with your MDI and says software is compatible with pc, it is OK.
Reconnect the MDI device and load software again.

Follow the correction connection procedure and settings:

USB connection:

Once install and run the MDI manager, power up the MDI tester using the A/C 12-volt adapter. Then connect it to your computer with via USB cable.  The  automotive scan tool MDI appears in the application’s Explorer window where all the MDI units detected by your PC.

WIFI wireless connection:

1) Click MDI_Manager icon to start the MDI Manager software
2) Connect MDI with PC using USB cable
3) Power on the MDI by plugging in the A/C 12-volt adapter
4) Select and Connect to your MDI in the MDI Manager software MDI Explorer tab.
5) Select “Network Setup”
6) Select “Wireless” tab.
7) Select “Enable Wireless Interface check box in the Interface Control box to enable the interface. Once you enable the interface, the IP Address Configuration box and the Apply and Cancel buttons become active.
8) Select Obtain an IP address automatically if your LAN automatically assigns IP addresses. Otherwise enter the assigned IP Address and Subnet mask.
9) Select “Access Point” to start wireless access configuration.
10) If you are not within range of the access point you want to use, or the access point is not broadcasting its SSID, select the Enter Network Name [SSID]: radio button and type the network name.
11) If you are within range of your wireless access point, choose the Select from available network list radio button and then select Refresh to cause the MDI to search for wireless network signals. The detected networks are displayed in the Network Name box.
12) Select Configure after you have entered the network name
13) Enter the security setting that are required by your network, then select Next.
14) Select Yes to re-configure your MDI, or if you want to start over select No.
15) Select OK.
16) Choose the Properties tab to verify that the MDI is configured correctly.
17) Write down previous settings you did for future reference.


Installing the MDI Manager software installs certain utilities that are required for your TIS2Web programs to use the MDI. But, it is not necessary to start the MDI Manager software before using TIS2Web programs.

GM MDI No Connect Solved by Reflash Firmware

GM MDI Multiple Diagnostic Interface NO connection problem can be solved by reflashing MDI diagnostic scanner.


Reflash GM MDI:

step 1 press button and connect with power


2 wait about 10 secs ,keep press the button,no stop


3 when all light turn on,you can take off the button

4 connect with usb key ,prepare for reflash


5 open GM Scan tool MDI manager ,choose recover