Question about Mazda MAZDA3
Junkyard find is the cheapest bet, if not youll have to order a replacement harness and ecm from mazda. if the harness and ecm was stolen out of the car your insurance may cover the repair.
Posted on Oct 15, 2013
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Posted on Jan 02, 2017
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May 23, 2016 | 2006 Mazda B
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Sep 04, 2012 | 2000 Mazda MPV
are actually VERY
MOST vehicles. (Although you would not guess that by the
number of PCM's that are sold and replaced every year). Too many people jump to
conclusions and blame anything they cannot explain on "Bad PCM". Just
read ANY online auto repair
blog and you will find THOUSANDS
of posts where the poster has already replaced the PCM, but the problem still
PCM replacement should only occur after ALL OTHER POSSIBILITIES have been THOROUGHLY checked with the correct equipment and the proper methods of testing.
OK, that's my "preaching" for the day......
I think it prudent to inform you that your DASH ILLUMINATION and PARK/MARKER lamps are not controlled by the PCM on your vehicle. So, I believe that would eliminate that possibility all-together. (Deep breath....sigh of relief ---- ; )
Those circuits DO go through the Passenger Junction Box (PJB) though.
Mazda has published a Technical Service Bulletin (TSB) for your car which addresses MANY intermittent electrical failures as a result of faulty/loose electrical connections at the PJB. I think that would be the first place I would look for the solution.
TSB REFERENCE NUMBER: 09-025/05
May 15, 2012 | 2004 Mazda 3
Nov 16, 2011 | 2001 Mazda Protege
Sep 06, 2011 | 1999 Oldsmobile Alero
Sep 30, 2008 | 1988 Toyota Celica Liftback
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