key fobs intermittent

[icebob]

Now another issue, I don't have comfort access, my keyfobs work intermittently... One of them is brand new, they work for a couple days, then out of nowhere, stop locking/unlocking doors... a day or 2 later, they just begin to work again... I already replaced the aerial diversity amp... any ideas?

[ard]

Those are the ones that dont have a replaceable battery- that you need to click into the slot to recharge, yes??

[icebob]

yep

[Qsilver7]

So....I guess we'll have to drag some details out from you to get some perspective.

You say that you have the regular remotes that have a rechargeable battery inside them that requires that they spend some time in the "ignition slot" to get some recharge time since the battery inside the key won't last forever.

I see nothing written that reveals that the remotes have spent anytime in the slot long enough to give them a good charge. Would we be remiss in not asking this? Or get fleeced for assuming that you haven't done this?

[icebob]

Yes, both have spent quite some time in the slot, just came back from a 600+ miles trip...

[ard]

Ya know....every device I have with a rechargeable battery eventually loses its ability to retain 'like new' charge capabilities.

HOWEVER...OP says one is brand new. And it does the same thing. Hmmm

www.newtis.info, prolly find a description for how they generally work

https://www.newtis.info/tisv2/a/en/e...system/XMWfMsG

https://www.newtis.info/tisv2/a/en/e...minals/XnGFECK

Anything of note around this "new" key??? Any programming done? any stories there?

JBE and FRMs can flake out and cause issues. Do you have ANY other electrical anomalies?

[icebob]

The new key fob was bought new from stealer, programmed. It was activated and working properly with my car. It's just that once in a while it will stop working ( same with the original key fob) for a couple days and out of nowhere, start to work again (Note: when they stop working, it's always both at the same time, and same when they start working again).
As for other electrical issue, I had a high battery drain warning when the car was sitting overnight. This was troubleshot to a defective TCU. TCU got replaced and never got the warning again. And to be clear, I was having this intermittent key fob issue prior to replacing the TCU. Hope this make the situation clearer.

[AlpineX]

Check the connections from the aerial diversity to the CAS module. Check for signs of moisture in your right 1/4 panel cargo area.

[Big Smoke]

2 year stealership part, should have a two year warranty? No?

[icebob]

I'm pretty sure the problem is with the car, not the keyfobs