Subaru flaky remotes - and the solution
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From: Sylvia Else on 23 Jun 2010 09:01 On 23/06/2010 10:43 PM, Kev wrote: > Sylvia Else wrote: >> On 23/06/2010 9:12 PM, Feral wrote: >>> Sylvia Else wrote: >>> >>>> The contact points are in air. What's the electrolyte? >>> >>> Then it's verdigris related, caused by a current passing through >>> dissimilar metals close to, or at the contact point? >>> >>> >> >> I haven't noticed any discolouration on the battery, but I suppose the >> contact point would be small. >> >> However, if the problem is of that nature, then the manufacturing >> solution is obvious, and should long ago have become the standard. >> >> Sylvia. > > > But how many people can or know how to solder anything > some have major problems just replacing a battery(yet they seem to be > able to continue breathing) > Um no, I meant that if the problem derives from contacts made from a different metal from the battery case, the obvious manufacturing solution is to standardise so that they're made from the same metal. Of course, the contacts have to be springy, but their tips could be plated with the appropriate metal. Sylvia.
From: Brad on 23 Jun 2010 19:04 "Milton" <millame23(a)yahoo.com> wrote in message news:4c21d1a5$0$28671$c3e8da3(a)news.astraweb.com... : : "Sylvia Else" <sylvia(a)not.here.invalid> wrote in message : news:88di1hFesiU2(a)mid.individual.net... : > On 23/06/2010 2:31 PM, Jason James wrote: : >> "Sylvia Else"<sylvia(a)not.here.invalid> wrote in message : >> news:88b8rgFdp0U1(a)mid.individual.net... : >>> On 22/06/2010 5:44 PM, D Walford wrote: : >>>> On 22/06/2010 11:49 AM, Sylvia Else wrote: : >>>>> I've posted in the past about how my keyless entry remote keyfobs kept : >>>>> failing. I have three, and they all misbehaved. I tried replacing : >>>>> batteries, I tried adding packing to increase the contact pressure, : >>>>> and : >>>>> nothing worked. : >>>>> : >>>>> Finally, out of frustration, I bought batteries with solder tags, and : >>>>> soldered the batteries to the circuit boards. Net result - perfect : >>>>> reliability. : >>>>> : >>>>> Indeed, by taking a grinding tool to the inside of the fob, I was able : >>>>> to assemble the circuit plus soldered battery (which is larger than : >>>>> the : >>>>> original) back where it belongs. : >>>>> : >>>>> The only remaining question is - why can't Subaru make contacts that : >>>>> work properly. : >>>> : >>>> How old is your Suby? : >>>> Never had a problem with our 06 Impreza or the current Forester. : >>>> Mates business has 6 Outbacks and he's never mentioned that problem. : >>>> : >>>> : >>>> Daryl : >>> : >>> It's a 2001 model Liberty, which we've had since it was new. The problem : >>> seemed somewhat worse in cold weather, but expriments involving putting : >>> the fobs into a fridge didn't produce any obvious result. : >>> : >>> From time to time, I disassembled the fobs and put them back together. : >>> They invariably worked after reassembly, only to fail again later. : >> : >> Its the age-old problem where batteries leak minute amts of acid or : >> whatever, which then makes a good contact difficult with the contacts due : >> corrosian. TV/DVD/etc etc remotes get like this as well,..where you have : >> to : >> spin the batteries to re-establish contact. Soldering is an excellent : >> solution. : >> : >> Jason : >> : >> : > : > I don't see why this should affect these silver-oxide batteries. The : > contact points are nowhere near a place where the battery could leak. : > : > Sylvia. : : Electrolosis Sylvia....... Faraday's laws actually : where m is the mass of the substance liberated at an electrode : Q is the total electric charge passed through the substance : F = 96,485 C mol-1 is the Faraday constant : M is the molar mass of the substance : z is the valency number of ions of the substance (electrons transferred per : ion) : Note that M / z is the same as the equivalent weight of the substance : altered. : For Faraday's first law, M, F, and z are constants, so that the larger the : value of Q the larger m will be. : For Faraday's second law, Q, F, and z are constants, so that the larger the : value of M / z (equivalent weight) the larger m will be. : In the simple case of constant-current electrolysis, Q = It leading to and : then to where n is the amount of substance ("number of moles") liberated: n : = m / M : t is the total time the constant current was applied. : In the more-complicated case of a variable electrical current, the total : charge Q is the electric current I(?) integrated over time ?: : Here t is the total electrolysis time. Note that tau is used as the current : I is a function of tau.[2] : : Regards : : Milton : Oh look Wodger can cut and paste. -- Brad Leyden 6� 43.5816' S 146� 59.3097' E WGS84 To mail spam is really hot but please reply to thread so all may benefit (or laugh at my mistakes) > >
From: D Walford on 24 Jun 2010 06:15 On 23/06/2010 10:09 PM, Sylvia Else wrote: > On 23/06/2010 8:52 PM, D Walford wrote: >> On 23/06/2010 9:57 AM, Sylvia Else wrote: >>> On 23/06/2010 8:48 AM, Trevor Wilson wrote: >>>> Sylvia Else wrote: >>>>> I've posted in the past about how my keyless entry remote keyfobs kept >>>>> failing. I have three, and they all misbehaved. I tried replacing >>>>> batteries, I tried adding packing to increase the contact pressure, >>>>> and nothing worked. >>>>> >>>>> Finally, out of frustration, I bought batteries with solder tags, and >>>>> soldered the batteries to the circuit boards. Net result - perfect >>>>> reliability. >>>>> >>>>> Indeed, by taking a grinding tool to the inside of the fob, I was able >>>>> to assemble the circuit plus soldered battery (which is larger than >>>>> the original) back where it belongs. >>>>> >>>>> The only remaining question is - why can't Subaru make contacts that >>>>> work properly. >>>> >>>> **Well, it is unlikely that Subaru actually makes the remotes. If they >>>> did, >>>> it would likely be as good as the cars themselves. >>>> >>>> >>> >>> In practice, a lot of the car parts are likely bought from suppliers. >>> But whoever makes them should be able to do a better job, and Subaru >>> should do a better job of monitoring. >> >> Why would they bother "monitoring", the car is ancient by Japanese >> standards and out or warranty by a very very long time. >> The remote on our new Forester is completely different to the Impreza >> remote so maybe they redesigned them recently. > > I meant monitoring in the sense of checking that what the suppliers were > providing would perform the task properly. How old was yours when it started to play up? If it was recent it has worked for about 9yrs, if it was Ford or Holden the whole car would be rooted by now so think yourself lucky you bought a Suby:-) Daryl
From: Milton on 24 Jun 2010 08:07 "Brad" <bradleyden(a)spammail.com> wrote in message news:hvu3ts$onm$1(a)news.ett.com.ua... > > Oh look Wodger can cut and paste. > > -- > Brad Leyden > 6� 43.5816' S 146� 59.3097' E WGS84 Still chasing membership points I notice. Perhaps the "club" doesn't want losers but keep trying, stranger things have happened. Regards Milton
From: Sylvia Else on 24 Jun 2010 09:12
On 24/06/2010 8:15 PM, D Walford wrote: > On 23/06/2010 10:09 PM, Sylvia Else wrote: >> On 23/06/2010 8:52 PM, D Walford wrote: >>> On 23/06/2010 9:57 AM, Sylvia Else wrote: >>>> On 23/06/2010 8:48 AM, Trevor Wilson wrote: >>>>> Sylvia Else wrote: >>>>>> I've posted in the past about how my keyless entry remote keyfobs >>>>>> kept >>>>>> failing. I have three, and they all misbehaved. I tried replacing >>>>>> batteries, I tried adding packing to increase the contact pressure, >>>>>> and nothing worked. >>>>>> >>>>>> Finally, out of frustration, I bought batteries with solder tags, and >>>>>> soldered the batteries to the circuit boards. Net result - perfect >>>>>> reliability. >>>>>> >>>>>> Indeed, by taking a grinding tool to the inside of the fob, I was >>>>>> able >>>>>> to assemble the circuit plus soldered battery (which is larger than >>>>>> the original) back where it belongs. >>>>>> >>>>>> The only remaining question is - why can't Subaru make contacts that >>>>>> work properly. >>>>> >>>>> **Well, it is unlikely that Subaru actually makes the remotes. If they >>>>> did, >>>>> it would likely be as good as the cars themselves. >>>>> >>>>> >>>> >>>> In practice, a lot of the car parts are likely bought from suppliers. >>>> But whoever makes them should be able to do a better job, and Subaru >>>> should do a better job of monitoring. >>> >>> Why would they bother "monitoring", the car is ancient by Japanese >>> standards and out or warranty by a very very long time. >>> The remote on our new Forester is completely different to the Impreza >>> remote so maybe they redesigned them recently. >> >> I meant monitoring in the sense of checking that what the suppliers were >> providing would perform the task properly. > > How old was yours when it started to play up? > If it was recent it has worked for about 9yrs, if it was Ford or Holden > the whole car would be rooted by now so think yourself lucky you bought > a Suby:-) That's hard to answer. My key lasted considerably longer than the other key that's in regular use (the third is a spare), and I use mine more often. I think it must have been out of warranty, or we'd have said something at the time. But it wouldn't have been more than five years. The car's had a quiet life - it's only done 97K. We'll keep it as long as it behaves, since there seems no point in spending money on a new car that we don't use much just for the sake of it. Particularly now that the key-fob issue is resolved :) Sylvia. |