This months 'Tech Tip' from the CAS Tech Support guys involves the GM MDI interface device... read on if you own one or are considering purchasing one in the near future.
There have been a growing number of calls into our tech support lines from our customers that are having issues with their GM MDI/GDS-2 system. Seems that in more than one occasion the batteries inside the MDI device have leaked and caused damage. What...You didn't know your MDI had four 'AAA' alkaline batteries in it? Don't feel alone, as most users are not aware of this fact.
The purpose of the battery pack is to save the GM technician time between vehicles. It seems the batteries keep the tool 'initialized' when switching between vehicles. Although the MDI pulls it's power from the DLC connector when connected, without the batteries the tech would have to wait for the tool to 're-initialize' before starting on the next vehicle once he connects up. A 45 second wait period is normal in this case. The batteries prevent this delay period.
Unfortunately, the consequences of not knowing about the batteries results in no one checking or changing them on a regular basis. Since most aftermarket shop owners don't typically move from GM to GM, an MDI interface with dead batteries works fine but simply 'shuts down' after each use. This is not a big deal for almost all users, until those batteries start leaking and damage the device! So, save your self some grief and unnecessary repair costs, change your MDI batteries if they are over 1 year old.
If you or your techs require service on your MDI/GDS scan tool, in either doing a software update, hardware repairs or resolving other operational issues, call your local CAS Rep for assistance or CAS Tech Support at 1-877-263-4897 M-F 8:30am - 5:00pm Eastern Standard Time. We're here to help!
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