Question about 2007 Honda Fit Sport Hatchback

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What could cause my ODB2 connector to stop working?

Last weekend I disconnected my battery overnight while performing some maintenance (tune-up, reset P0420 engine code) and when I reconnected my gauge cluster no longer works. The check engine light is on but my scanguage and the Honda dealer's computed will not connect to read it. They have spent 3 days looking now. tracing wires and said that all of the fuses/relays are working fine. Does anyone have any insight or has experienced a similar problem?

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Did the technicians check the powers and grounds at the DLC Diagnostic link connector ?

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It's got to be another connector or fuse someplace. The OBD II connector does supply power to the reader and one of the very likely sources of failure is the fuse for that power. My GF's GMC Yukon XL OBD II connector didn't work and it turned out that the power was on the same fuse as...the cigarette lighter. She knew her son-in-law had caused the lighter to stop working but it never occurred to her that there would be any side effects.

You should be able to find the wiring diagrams online or get a copy from the dealer (especially since he cannot find the problem) and trace back from the OBD II connector to the fuse and power source to identify the fuse in question. Of course, if it appears good, check it with a meter--they can blow in spots you can't see.

Good luck!

Posted on Apr 02, 2015


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