Subaru flaky remotes - and the solution
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From: Fast Freddy on 23 Jun 2010 04:07 Sylvia Else wrote: > > 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. > they use lithium cells don't they?, lithium cells don't quite suffer the same problem with leakage as silver oxide or alkaline cells. whatever, a friend of mine has the same problems with her 2005 subaru forester, one remote works only for a short time after taking the battery out wiping it and placing it back in, the other remote works but on occasions stops working.
From: Sylvia Else on 23 Jun 2010 04:28 On 23/06/2010 6:07 PM, Fast Freddy wrote: > Sylvia Else wrote: > >> >> 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. >> > > they use lithium cells don't they?, lithium cells don't quite suffer the > same problem with leakage as silver oxide or alkaline cells. Oops - yes, when I went and checked, I find that it's a lithium. > > whatever, a friend of mine has the same problems with her 2005 subaru > forester, one remote works only for a short time after taking the > battery out wiping it and placing it back in, the other remote works but > on occasions stops working. Perhaps I should start a business soldering batteries into keyfobs. Sylvia.
From: F Murtz on 23 Jun 2010 04:34 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. > > Sylvia. It is probably fixable but precious metals are too expensive.
From: Milton on 23 Jun 2010 05:19 "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
From: Sylvia Else on 23 Jun 2010 05:22
On 23/06/2010 7:19 PM, Milton wrote: > > "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 The contact points are in air. What's the electrolyte? Sylvia. |