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Discussion summary
YOUR RESEARCH0Excessive Key Fob Battery Drain
Leading reported evidence
Check second set of keys
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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1
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Suggestion · Original poster
I will have to check my second set of keys to see if they do the same thing.
Leading evidence: 'Check second set of keys' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check second set of keys' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Replace couple of small, inexpensive momentary switches
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
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Suggestion
The article describes rescuing a dysfunctional key by replacing a couple of small, inexpensive momentary switches.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T144035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Has anyone else had their key fob drain batteries in a week or two?
Mine continues to drain the battery even after the button has been released (between 3 and 7 mA).
I think both my key fobs do this, which is more than a simple fluke.
My last battery lasted less than 1 week.
No.
Try this: Take a new battery and insert it backwards. Plus to minus and minus to plus. Then remove and insert it the correct way round.
Also, be sure a battery button doesn't get pressed and held down when you sit down. I always remove my car keys from my pockets to avoid this.
I think it was an intermittent connection on the PC board. When I pressed a button it would continue to draw current (no LED) until I twisted the PC board, then it would stop.
I resoldered all the surface mount leads on the IC chips, then washed everything in acetone to remove any flux. It seems to be working correctly now - no current draw after the button is pressed.
I will have to check my second set of keys to see if they do the same thing.
The Printed Circuit Board switches may be sticking/bad.
If it is the switch you can replace it.
Part #CKN9193CT-ND
http://search.digikey.com/scripts/Dk...T-ND&x=26&y=17
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http://www.renntech.org/forums/topic...opped-working/
From the above link"
"Dave:
There is an interesting article in the June 2010 issue of Excellence Magazine entitled: "Fob 4 Less: Fixing a modern Porsche key for less than $3 bucks". The article describes rescuing a dysfunctional key by replacing a couple of small, inexpensive momentary switches. Looks relatively easy to do and since the electronic functions of your key are already messed up you don't have much to lose. I have one non-functional fob, but since the other is working I haven't tried this idea yet. I did call the dealer about a replacment. They offered to solve the problem for $375. If you go the diy route please let folks know how it works out.
The article lists the source for the momentary switch as:
www.digikey.com
, phone # [phone removed]). The three switches (this is a reply to a targa owner 3 switch Remote) are normally off (part # CKN9193CT-ND). The web link is:
http://search.digike...CT-ND&x=27&y=19"
Not in stock, but I suspect that a sub could be found if needed
However, that could be the problem. So far resoldering seems to have it working, but time will tell.
This is a source reference. Confirm exact model applicability in the original material.
