Hi Everyone,

I have a 2014 Mazda 3 and the OBD2 port is not reading. I have tried several different code readers and it looks like there is no power getting to the port. Is there a fuse for the port that I can check? I would love suggestions and ideas. Thanks.

Eric

 

Seldom ECU/PCM fuses go bad .....After checking for a fuse for your specif year and model. Generally by disconnecting the battery and doing a basic continuity or ohm test with a Digital volt/ohm meter.
If that is ok then ....
This is not uncommon on any vehicle when the ECU/PCM is possibly failing or you have a basic electrical connection problem.
First assuming that the battery is fully charged and has been load tested for health and the negative ground to the body is secure......disconnect the battery for about 5-10 minutes. While the battery is off disconnect the ECU from the harness and inspect the terminals and then VERY carefully re-connect the ECU. Now connect the battery and recheck the Diagnostic connector.
If you do not get a live reading with a quality Scanning diagnostic tool then you need to find your connect wire information and start the time consuming time to check a few of the connectors for continuity as per the service guide.

 

Don't know if this is any help






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