Q: Issue with the scanner connection to the EC

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2000 Blazer. I tried to use my scanner and it was connected with no problems but it wouldn't communicate with the EC. What could be the problem?

If you’ve got a scanner and it’s not communicating with the computer system, there are really only three possible issues if your scanner has actually worked.

The first possible issue is with wiring pins, specifically in the connector where you plug it in. If the data link connectors are bent they will be unable to operate. Check to make sure that none of them are bent.

Another probably issue is that you’ve got a wiring problem in the car somewhere and it’s shorting the system out. It could be a bad MAF sensor or the itself wiring that is connected to the MAF sensor.

Lastly, the third possibility is a bad EC. If the main computer goes bad, you can’t communicate with it. If this is the case, you’ll want to hope that you can find the wiring short so that it will be able to communicate.

If you need assistance with these checks, contact a certified mechanic who can find the root of your electrical problems and fix it accordingly.

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