Key fob not syncing with security system

When I hit the PTS button I feel like I hear a whirring sound for maybe 45seconds or so. Is there a chance thats the starter spinning, and it finally stops because it doesnt get the fuel supply? Or is that something I'd never hear

 

I would bet on the fuel pump. It is a returnless system, so it just doing a short loop in the tank. If the starter was firing, it's much louder and you'd feel it. The injectors will not fire until revolutions are sensed through the Crank Position Sensor.

45sec seems like a long time, but you do have an odd thing going on.

 

Just in case it helps, the Taco engine and related systems description is attached.

Also, there is a link to the online Taco Service Manual in signature.

 

If we're on the heat topic, a problem that used to occur with OEM fuses on my Italian bike is that they would crack out from vibrations and fail intermittently.

It might be worth checking the ignition and immobilizer related fuses? Heat could cause them expand and go open circuit? I have not heard that issue here, but it is worth a look.

 

So what makes the lease sense to me is that when it happens, it takes hours for itself to reset when I'm leaving in one place, but every time I've had it put on a tow truck and towed just under 10 mi to the car mechanic, it always starts up

 

On a tow truck, it is being jostled around and seeing some additional air movement. So, it is a different environment than just sitting still somewhere.


One possible diagnostic approach:

 

Next time it fails u should record a video.

 

And, have TechStream hooked up!

 

What would I record? Just what exactly happens when I push the start button?

 

Yeah. And Guage cluster maybe?

 

Gotcha.

 

The security system should do a self test. Illuminate the light, then go back off. That's mostly what I'm curious about. And curious if it's acting the same and pushing the button with out the brake pushed.

 

If heat and fuses were the issues, like you were mentioning, it would still make sense that the car would start when hot wired right? The hot wiring would be bypassing all of those fuses and sensors

 

From what I think I know, the immobilizer system only works for a short time like the starter?


But for clarity: When you are stuck, if you have power going start to the starter (spinning it and the engine), the engine will start if you have your foot on the brake and hit the PTS?

Or, are you at Ignition On (two taps of the PTS button without your foot on the brake) and then are spinning the starter and engine with direct power to the starter?


If neither of those, my apologies!

 

I think you are referring to the one time I had it hot-wired. That was over a month ago now and we tried so many things to get it to start that I'm not sure.

Normally when I am stuck, like today, when I push the PTS button, all the electronics come on on the gauge cluster, the radio etc. The engine does nothing that I hear. No clicking, no attempts at turning over, nothing. I'm not even entirely sure about that whirring I mentioned earlier, it was just something I thought I heard a couple of times.

 

I am just trying to get a general understanding and be sure that I am not thinking about the problem in the wrong way. No big deal!


I am almost certain that you are hearing the fuel pump.

 

I just got off the phone with my mechanic and he said he is going to look into installing a new PTS button that would bypass the inherent toyota security system. It would have it's own security system requiring the key fob, but that I could use it as a backup/fail safe

 

I don't think that is a possibility? He may certainly know more than I do.


My experience is mainly about messing with the transponder chip and programming an additional key on my Taco along with messing with a bunch of folks Tacos when flashing tunes on them.




Like I said, your issue seems pretty unique around here?

 

I like being unique, but not this unique. If you were to guess, how likely would my problem be an intermittently failure security code clearance that deprogramming everything and reprogramming everything would fix?

 

I agree!


I have heard of intermittent immobilizer problems, but never experienced them. I have had issues where wireless devices have gone flaky, including security devices like garage door openers, where clearing the baffles 100% helped for sure.

There are YouTube videos that show the entire process. It is slightly time consuming, but pretty easy to do. If it were my Taco and I was getting stranded out, I would be very tempted to give it a shot. But then, I already have all of the tools.

If you have doubts, it might be worth talking to a good, local locksmith? They can do the work and may have more concrete info / thoughts on the matter.