My wife have a 1984 Eldo Biarrtez and I just ran an ECM Diagnostic Code test. The following codes came up #23 & 52. #23 is EST/Bypass Circuit Problem and #52 is ECM Memory Reset Indicator.
I need to know what I have to do to fix the problems. Do I have to replace the parts or just let the vehicle run for awhile since its in storage and maybe the reading showed up because the vehicle hasn't been running for awhile? I looked up what an ECM unit would cost and if I need one should I buy the one already programmed, I don't have the equipment to reprogram one.
Thank you all.
I don't have an 84 manual or know where my 83 is at the moment but what does it say about those codes? The factory manuals for these have very good information on what it takes to set the codes and the troubleshooting for them.
Even at this age its not common for the computer to actually be the problem. Vast majority of the time its the computer is getting bad data in. You could end up needing a scan tool to see what the computer is seeing. The 'programming' for these is a chip that plugs in through a hatch in the computer cover. Replacement computers unless they are from a junkyard don't come with any chip installed, you swap the old one in.
I owned 5 from this model run... two were convertibles... I'm just one data point, but both Biarritz convertibles left me stranded because of ECM failures (one failed 2010 near Portsmouth, NH, and the other in 2013, near OCean CIty, Maryland)... they were both high mileage...I drove them very carefully (as if I had an uncooked egg between my foot and the accelerator). They both lived outside during harsh cold, damp Maine winters. Now that these cars are 4 decades old, electronic circuit boards are subject to corrosion build up, so that the surfaces among solder joints create electrical leakage. I had them towed to Cadillac, and they replaced the ecms... cost was over $1,000. I'd call a Cadillac service department and find out if they still have new old stock. Depending on how handy you are, you might consider removing your ECM and cleaning the circuit board and contact connections using appropriate cleaning techniques and liquids. I've been successful doing this service with far less complex speaker/amplifiers in my Allante. James
Thank you so much James, Let me know what they say.