The Series1 Citroen XM would give you all these electrical challenges way back in 1989....
The XM ahead of it's time?
I rest my case...
rg
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Yes but a Series1 XM would give you all those challenges without you disconnecting the battery - or have I missed the point here?
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I was working at a Renault main dealer the other day, and they were replacing the battery on a new Laguna. I asked them if they were using a code saver in the fag lighter. Nope, he said, we'll just code back in the electric windows manually. So who knows, some don't seem to mind, others do a bit, some do a lot.
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Someone asked earlier about Ford modules recalibrating themselves;I'll gire you some info.On ECU's without adaptive stategy-When you disconnect the module it loses everything it has learnt,for example, at idle,there will be slight differences between engines in the amount of friction in the engines and in the components fitted to the engines(top limit,bottom limit etc)so when you idle the engine,it takes a second or so to check the idle speed and CO and reset them to where they should be.With adaptive stategy it resets the criteria to where they were when the engine was last idling;this is why you need to run the engine in all conditions,not just idle,the engine must relearn all it's criteria.
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jc - It picks up air pressure, humidity, that sort of thing, yes? And driving style? Average throttle position, highest speed and revs reached? Does it grass you up to the service technician later?
Dave N - Everything needs to talk to each other? You're not kidding... I've looked over the mechanic's shoulder when he's been resetting my service indicator with his plug-in computer thingy, he's been running through a list of possible sources of fault codes, items on the display included headlamp levelling, wiper control, and radio! All well and good while it works, I suppose.
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Air pressure etc.it doesn't remember;measures air mass instantly-the latest types will remember driving style and,yes,will grass you to the technician.
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All this is very well if only one driver uses a vehicles.
In our case, and I suspect many households, we have two cars and three drivers and interchange frequently.
So the electronics would have to relearn driving styles two or three times a day and it would be all wrong when a change took place until the learning curve was complete. Although some usages may be short journey, say 4 or 5 miles, not suffucient for reprogramming to be completed.
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bring back the Morris Minor
(but even that had an electric fuelpump..)
:))
rg
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Well said that man Govier
DVD
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bring back the Morris Minor (but even that had an electric fuelpump..) :)) rg
Yeah and you could reprogram it by hitting it with the heavy end of a screwdriver. ;-)
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please don't bring it back
don't even joke about it
H.
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Stranger in a strange land
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Haynes manual for Ford Focus suggests that you drive for at least 15 minutes at a variety of speeds, mostly concentrating on the 2000-4000rpm range, followed by 10 minutes at idle (while moving steering wheel occasionally and switching on high-powered equipment).
I wonder if there is an advantage of disconnecting and reconnecting the battery when you buy a used car, so it can 'learn' and 'optimise' iself to the new owner's driving style?
On the other hand, is the battery disconnected during electrical servicing, such as replacing the spark plugs? If this is the case, does the mechanic take the car for a drive while following the routine above? Would there be an adverse effect of not following the routine?
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I didn't disconnect the battery when servicing my car, but then again, changing the oil and air filter will have an effect on the car and require it to relearn the best parameters.
Ben
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On any car, just in case, connect a spare battery with jump leads to earth and somewhere directly connected to battery positive, eg the starter terminal.
Remove the old battery, remembering that the loose positive terminal will be live, connect up new battery, remove jump leads.
Hey presto, job done, nothing is lost, nothing needs reprogramming.
With skill, the replacement battery itself can be used as the back-up, but that needs very careful juggling with the jumper leads.
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Cliff - a very sensible precaution - thus saving a lot of potential aggro....
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I managed to flatten the battery on Erindoor's Punto 99 HLX a couple of months ago after leaving interior lights on for a few days. The battery was totally flat, no sign of life at all. GEM breakdown jump started me, I was worried about immobilizer codes etc...... It started instantly, the only side effect was that the trip computer and clock had reset and the radio took 10 seconds to read its code from the computer.
The breakdown guy said that most recent cars with fully integrated computers are usually OK, but he always had trouble with cars with earlier coded immobilisers and seperate radio/abs/central locking computers etc.. (mid 90's cars).
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I have to be very careful with what I post here.
You are absolutely correct with what you wrote.
And also with what you did not write.
Imagine a car that has had no development, other than styling, since the 70s.
Yes, the 70s.
Associate companies did intervene.
You are now seeing a bit more about me.
Watch what GM does. They saw something that I did.
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Sean - You been drinking? :-)
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Yes.
How did you tell?
OK. What I meant was along the lines of no significant development, compared to their competitors, since the 70's.
I agree, not the same thing, at all.
I was wrong to say what I did. My views are mine and not of any associate.
I'm on the cusp of launching into technical details which would have been simple to sort by the owner of the breakthrough.
Fiat have a superb concept in the JTD multijet idea.
Lots of squirts into a flame. NO noise. Yes, really. And 300mpg.
Robert Bosch and Siemens are ready and waiting. Salivating. That part is true. Look at the previous injection systems. Jetronic and all that nonsense.
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