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Post by divtal on Aug 31, 2018 18:58:12 GMT
In California, new cars don't have to have a smog-check for the first 5 years. So, my 2012 Corolla had to have it's first one this year. The day after I received my notice from the DMV, I took it to a neighborhood garage that runs smog tests all day. When I went to retrieve it, I was told that they couldn't do the test, and asked if I had disconnected the battery, recently. I said "no." For the record, I don't make a habit of disconnecting my car battery. It doesn't sound like a great deal of fun, to me. (My car had been part of that massive recall of faulty air-bags, which involved several makes of cars. I heard about it several months before I was notified that my car was involved. And, it was 10 months between the notification, and it being "my turn" for the repair. During those 10 months, I couldn't have a passenger in the front seat.)The repair involved disconnecting the battery, and that wiped all of the recorded data that's necessary for the "smog-machine," to its job. I was advised to drive it, on the freeway, for about 100 miles, to "rebuild" the data. I drove it far more than that ... to no avail. I was told that cars can differ, and some may need hundreds of miles. So, I took it to Toyota and paid $350.00 to have them run it, to a state-of-readiness for the smog test. I will never, again, submit my car to any procedure without asking if it will involve disconnecting the battery. If it does, and my car is anywhere close to needing a smog test, I will weigh holding off from that procedure, until the testing is complete.This may be elementary to those of you who have knowledge of automotive technology, but it was a $350.00 lesson for me.
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Post by mecano04 on Aug 31, 2018 21:29:44 GMT
My best guess is thy wanted to get the fuel trims (short ad long) data back.
I don't know if you're the kind of person who just want to put the key in and drive wherever you want or if you're someone who actually like to know how things works but here is a nice (nearly 12mins long) video about the fuel trims (it's clear even if you don't know much):
That's the best guess I could make because usually car repair shops have the emissions control machine that tell them exactly if you car pollutes, the kind and quantity of particles released.
I haven't worked on many Toyota products but I know some GM models, even early 2000s, keep the data for a while after the battery is disconnected.
In any case, it sucks that you had to pay 350$ for that.
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Post by divtal on Sept 1, 2018 18:30:12 GMT
I'll watch it, thank you! I'd like to learn more about what happened. I would, certainly, like to avoid a repeat.
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Post by vegalyra on Sept 18, 2018 20:42:24 GMT
Sorry about your experience. Things were a lot easier in the old days when they just worried about headlight alignment and condition of your tires and horn.
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