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That is a common failure mode for oil pressure sensor. If it stays high for a certain amount of time and it will set a code. Be sure to get one for a '91 model. I believe it might be different from earlier models.3 points
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Oh my. OBD is on board diagnostics & is just a small part of the serial LAN that is the Assembly Line Data Link.. Besides the diagnostics the ALDL is how all of the modules (10ish) talk to and command each other. In the beginning (like 1981) GM called it the Computer Command Control (CCC) and about 1986 became the higher speed ALDL. There is a file on the Internet called ALDLSTUFF.ZIP that described the communications.3 points
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Thank you Ronnie.1 point
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The only code was 034 and h means it is History rather than Current. I'd just clear it. ones below are categories not codes (see the "Diaglnostics" link above).1 point
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Jim, yes, the module is way/way up behind the parking brake, and it is a 20amp in-line fuse near the module.1 point
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Regarding the position of the horn buttons, the picture shows that they are sort of sticking up. Although this seems to be odd, the horn buttons on the '90 and '91 Reattas do in fact stick out. That is their normal position and never are fully seated until they are depressed when sounding the horn. The typical problem with the horn buttons is that they break when too much force is used on them.1 point
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You have to take off the horn pad. Then disconnect the air bag electrical connection. After that I don't remember as it's been years since I had one apart. Many people have advised disconnecting the battery before starting this project. Don't want the air bag to deploy. I never had, but then again I've always been lucky...1 point
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See "Diagnostics", above. There are listings of the various error codes there. Or do you mean that your codes aren't listed? In any case, a Factory Service Manual is your best friend. I think I saw on your other posts that you already got one? There is also a factory parts diagrams manual, and a factory parts number catalogue for these cars. I use all three as I figure out part numbers, and how things are connected.1 point
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My new to me 1991 Gunmetal Gray metallic with 16 Way Adjustable Seats and drivers seat in Slate Leather.
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Ronnie, you did by no means sound like that. I believe there was no "standardization" of auto diagnostics across the auto industry until the Feds mandated it with OBDII.1 point
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I think you may be right about the Reatta system being pre-OBD1. It meets all the requirements of ODB1, and has the same code chart, but it might not have been considered to be ODB1 when it came out in 1988. Sorry if it sounded like I was trying to prove you wrong.1 point
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I guess I stand corrected.1 point
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The onboard diagnostic system in the Reatta is ODB1. I wonder if the Tech 1 Diagnostic Computer and others similar to it are capable of diagnosing the BCM or are they just for the ECM?1 point
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I took my Reatta out today and I noticed a new mural has been painted on the side of a building in town so I got a shot of my Reatta beside it.
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Thank you! I’ve been lurking for awhile using the how to guides and following other forum post ideas. it is an ever ongoing project to restore my grandmas 88. She bought it new and handed it down to me. In a lot of ways it’s the only remaining living memory of her since her passing.1 point
