1st Gen 2002 Tundra High pitch whine TVIP buzzer

I finally discovered the source of this whine noise and even have a name of what it is. From what I found it's a TVIP buzzer and it acts as a wireless key entry sensor, correct? Like if you have a key fob and it makes a chirp sound with fob button presses I suppose.

I found other posts about this problem. One said to cover it with tape and I did and it worked well to drown the noise, but the tape later came loose.

Another post said when they disconnected the buzzer they stated it completely drained their battery, but other sources say the opposite that disconnecting the buzzer is fine. I though maybe the truck with the dead battery had other underlying electrical system issues to cause the battery to drain. Cause I figured it wouldn't make sense that unplugging a piezo buzzer would case a battery to drain.
So the next day I decided to disconnect the buzzer and the next day the battery was dead and no sound of the engine trying to turn over.
I know it's not a bad battery cause it's a high end battery that can sit for months without being started and turn over with no issue.

I can fix the battery issue, but is there anyone else here know if the battery drain is an intended function from disconnecting the TVIP buzzer? I try to think of reasons why it would do that but can't make much sense of it.
I'm supposing that I should leave it plugged in, or have the buzzer replaced with a new one if there might be some short going on?

 

Unplugging piezo means it no longer draws current to drain battery. Is the below pic the piezo you're speaking of ?

 

Yup, that's exactly it. After I disconnected it, 12 hours later the battery was dead and it's one of those Optima type batteries.

Another bit of an update, with the battery still dead, I plugged the connector back in and a few hours later it started whining again, just not as loud. I let it sit overnight and it was still whining, but was loud again. So I tried to start and would still not turn over.
Something else interesting happened. After jumping the battery and driving around town, the battery was at full capacity again. I also noticed the piezo is no longer making sound.
I'm confounded by the whole thing.
But you say disconnecting it has nothing to do with the battery drain?

 

As it appears you are a new member, Welcome.
In the future, considering posting any and all of your issues into our 1st Gen Forum ---> 1st Gen Tundras (2000-2006) | Toyota Tundra Forum

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Also, if new to your Tundra, suggest reading this thread ---> So ... you wanna buy / just bought a 1st Gen Tundra, eh? | Toyota Tundra Forum

As for your issue....

That's what I am saying....with the piezo "chirper" unplugged it's no longer drawing current to drain the battery.
However, that chirper is normally associated with a RS3000 Toyota vehicle intrusion protection system(TVIP) for your 2000 Tundra. That system is what causes the chirper to make noise and where we need to determine why.

For instance....

• PIEZO "CHIRPER"....This device produces a soft "chirp" sound when the RS3000 is ARMED or REMOTE DISARMED. It also produces sound for the DOOR AJAR WARNING, and chirps to confirm function programming chanqes.
• DOOR AJAR WARNING....The PIEZO "CHIRPER" emits a continuous sound for up to 10 seconds when the user attempts to REMOTE ARM the system while a door trunk or hatch is open.

If one of your door switches has gone south, it could be causing the system to alert you, causing the "chirper" to be audible.
.
Do you know if your 2000 is equipped with an RS2000, if so do you have the below items in your Tundra ?