GM MDI Multiple Diagnostic Interface

GM MDI can test all GM cars from 1990—2012 year. General Motors Global Electrical Architecture (Global A) and Global Diagnostic Hardware &Software Global Diagnostic System DGS & Mutiple diagnostic Interface MDI.

GM Multiple Diagnostic Interface (MDI)
All current and most legacy vehicle protocols: UART, KW2000, CLASS2, GM LAN, etc.
Needed for Global A architechture vehicles
Supports Service Programming System (SPS)
Passthroughprogrmming on past model and Global A vehicles
Supports PC-Based diagnostics with rollout of the Global Diagnositc System (GDS) application
Includes Flight Recorder Mode

New Diagnostic Application Software required for Global A Vehicles
Global Diagnostic System (GDS)
PC-based software diagnsotics
DTCs, Diagnostics, Data Display & Visualization, Device Controls, Special Tests, Flight Recorder management, etc.
GDS is software which runs on a specific PC. Updates received via TIS2Web.
Multiple display options. More space for diagnsotics. Session management for multiple us.

MDI and GDS Background
MDI is an interface between the vehicle DLC and a PC (by wired USB, wired Ethernet, wireless Ethernet ) and TIS2web.
Can be Used for SPS programming on existing and future SGM vehicles
Required for diagnostics on new SGM Global A Electrical Architecture Vehicles
Used with TIS2Web, GM Global Diagnostics System (GDS), SPS and MDI Manager Software
Allows for GDS diagnostic

GM MDI installation:

PC specification require: Full installation version WIN XP3, pls install all the systerm patch (picture 0)
1: Open the software folder, double click “CD Start”pop-up installation window,and click “install” ( Picture 1)
2: Pls install the software in order : JAV A.EXE;Validat.exe;GMMDI Software.exe;Tech2Win.exe; (picture 2-6)
3: automatic install all the files above, when have message ” Copying PCMCIA files..”,please don’t touch any keyboard or mouse, just leave it alone, the  GM MDI USB drive will automatic install. (Picture 7-10)
4: after installation finish, there will be have a message ” press any key to continue…” and pls press any key, and software installation partly finish ( Picture 11)
5. Pls connect the USB cable to PC ( do not need to connect to the Car OBD at this time), the first time connect USB to PC, the USB drive will be detected on the lower right corner, then choose automatic install, click next to finish.
6. when USB drive installation finish, on your PC device manager ,you will find a “MDI USB Device(COM…” on Port place. (Picture 12) , if not then pls find the drive on MDI folder on the CD and install, if still not successful, then pls check  if the PC operation is correct or not.
7. open “GM MDI Menager” on the desk to do connection test (if the USB was correct installed, the red “X” on the dialogue will disappear, if the red “X” still on, then pls repeat steap 6
8: finish the installation above, pls connect your PC with internet. ( do not connect to the car OBD ) open this website and activate lease. after you open this web. Write any user’s name and click ok. All choose OK /continue ( picture 15-17)
9: in the main interface, please click “Global Diagnostic System2(GDS 2)” icon, and click GDS2 to run, at that time, software will update lease automatic .after update finish, software GDS2 (Launch GDS2 on the desk) will open automatically , choose the language and back to the main interface.
Bottom left will have a lease expire time. Be attention, it need only your PC systerm time, don’t change. Afterward we don’t need internet to update lease, so if there have any remind indicate new update available,please do not click update (picture 18-21

Test steps:

1: finish update lease step, connect with Car OBD, click diagnostic icon on the interface. Choose brand and click “input” on lower right corner, car information will be read automatically, or you can choose manual input VIN
2:choose test what you want, like module diagnostic—engine control modual—identifying information ( picture22-27)

What protocols does the GM MDI support?
For immediate use — At present, vehicles have two buses on the 16 pin connector
(high speed and low speed GMLAN). The GM MDI communicates using all of the existing GM protocols, the same as the Tech 2:
– UART
– Class 2
– KWP2000
– GMLAN (CAN)
Beginning with the 2008 model year vehicles, Pass-Thru will be the only programming method available. (Remote will continue to be available for previous vehicles.)

Posted in ECU, GM Tagged with: , , , , , , ,

Leave a Reply

%d bloggers like this: