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2K Chevy Blazer ODB2 Problems

mcheromchero Posts: 6
edited March 12 in Chevrolet
Have a co-worker whos 2000 Blazer won't pass inspection because the ODB2 interface won't link. In order to pass inspection the computer needs to be checked for codes, check engine light is on.

What options do we have other than replace the computer? The reader will work on other autos.

Ideas, thoughts?

Comments

  • mcheromchero Posts: 6
    Well after 3 weeks of NO RESPONSE I stumbled across the problem... Apparently, the cigarette lighter fuse ALSO powers the interface, No fuse, no communication with the computer!

    Replaced the blown fuse corrected!

    Hope this helps others.

    :mad:
  • steverstever Viva Las CrucesPosts: 41,296
    Thanks for the update. Seems a little odd that the lighter would be on the same circuit as the ECU, considering all the stuff people plug into the power ports.

    Good stumbling. :D

    Moderator
    Minivan fan. Feel free to message or email me - stever@edmunds.com.

  • mcheromchero Posts: 6
    Yes Steve, I was caught by surprise on this one. On the owners manual it states the fuse supplys both lighter and the Data Interface.
  • steverstever Viva Las CrucesPosts: 41,296
    You can buy 9 volt battery gizmos that plug into your power port to retain your ECU (and radio) settings when you swap out your car battery. Maybe that's one reason why they run the data interface that way.

    Moderator
    Minivan fan. Feel free to message or email me - stever@edmunds.com.

  • mcheromchero Posts: 6
    Excellent point Steve. I have seen the dealers insert a plug into the cigerette lighter with a battery on the other end when swapping out 12 volt batteries. Was told it keeps the memory in the computer while the 12v battery is disconnected.

    RM
This discussion has been closed.