Toyota 2005 Camry - replacement key fob

Forums › Transport (cars, bikes and boats) › Toyota 2005 Camry - replacement key fob - best option?

geekIT

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#280975 22-Jan-2021 23:25

One of the two remotes for this NZ\Aus assembled vehicle failed today. Seems like the battery is about clapped out.

A YouTube video showed the shell is easily opened and a new CR2032 battery popped in, but this one obviously wasn't designed that way.

I finally managed to split the glued-together shell but the battery appears to be soldered to the circuit board.

Suggestions welcomed.

PS: The spare unit still works OK. Dunno for how long though.

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k1w1k1d

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#2640492 23-Jan-2021 09:05

Where are you?

Auto electricians or locksmiths should be able to sort this out.

gregmcc

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#2640498 23-Jan-2021 09:19

Can you take a photo of it - opened up, the battery should be an easy change, it's unusual for a car remote to have a soldered battery

geekIT

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#2640551 23-Jan-2021 10:20

k1w1k1d: Near Invercargill. But it's kinda, um, wild and woolly down here. Most of the cowcockies carry. People padlock their cars.

gregmcc: I've taken some pics - I'll upload them shortly. But I think I'm right about the soldering.

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gzt

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#2640567 23-Jan-2021 11:46

geekIT: Near Invercargill. But it's kinda, um, wild and woolly down here. Most of the cowcockies carry. People padlock their cars.

Any japanese import dealers around? They usually require a cheap source of keys to provide the spare with cars they sell.

gzt

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#2640569 23-Jan-2021 11:55

Btw, hard to believe it's lasted 15+ years. Do they really last that long?

gzt

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#2640572 23-Jan-2021 12:08

gregmcc: photo of it - opened up, the battery should be an easy change, it's unusual for a car remote to have a soldered battery

Probably this spotweld/soldered one - https://goughlui.com/2016/05/31/repair-teardown-toyota-camry-2000-remote-key-fob/

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k1w1k1d

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#2640602 23-Jan-2021 12:30

Toyota Camry, Avalon ,Conquest Remote , RCG08 | Trade Me Motors

Is this it?

geekIT

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#2640639 23-Jan-2021 15:53

gzt: Yep, that's the one, see below. The circuit board is a little different from mine, I think.

This photo shows the plastic foam packer at top left. The indentation on it is from the raised 'crater edge' in the case shell. It was glued to the battery with, probably, super glue. The case shells were also glued togther.

Photo shows the solder points and the push switches.

Photo shows the 4 spot welds on the battery support flange.

General elevation.

Not sure I have the gear, or a steady enough hand to desolder the battery. Or put in another. Unless there's an easy way to re-spot weld the battery flange to a new battery?

k1w1k1d: That remote might do it. Mine is the one at top right, with the two buttons.

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geekIT

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#2640641 23-Jan-2021 16:01

gzt: Btw, hard to believe it's lasted 15+ years. Do they really last that long?

Computer motherboards use this same battery to power the BIOS chip. The data this chip contains is like a mini-windows. When the power is switched on, the BIOS has a quick look to see if a number of different parameters have been met, then tells the system to load. I've seen motherboard batteries last 20 years. They're the first thing to check if an old computer suddenly won't boot.

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gregmcc

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#2640647 23-Jan-2021 16:24

geekIT:

gzt: Yep, that's the one, see below. The circuit board is a little different from mine, I think.

This photo shows the plastic foam packer at top left. The indentation on it is from the raised 'crater edge' in the case shell. It was glued to the battery with, probably, super glue. The case shells were also glued togther.

Photo shows the solder points and the push switches.

Photo shows the 4 spot welds on the battery support flange.

General elevation.

Not sure I have the gear, or a steady enough hand to desolder the battery. Or put in another. Unless there's an easy way to re-spot weld the battery flange to a new battery?

k1w1k1d: That remote might do it. Mine is the one at top right, with the two buttons.

Yes it is soldered, if you are interested send it too me and i'll unsolder the old one and re-solder a new one. It's like a 20min job to desolder, remove the spot welded tabs, solder those to a new battery and resolder to the remote.

It looks like a 2032, can kind of see the 32 on the end, 2032=20mm round, 3.2mm thick.

Drop me a PM if you are interested

richms

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#2640659 23-Jan-2021 17:24

There are many types of those board mount lithium cell styles, so best would be to desolder the old one and then compare it with ones from a legit retailer like RS or farnell on the website. I know in the past when they were shippable from china, I had many wrong ones turn up when trying to do pokemon cartridge replacements a few years back. Pictures were nothing like what I was sent.

Richard rich.ms