Remote central locking not working

Did you try checking the 12v battery voltage? Should be at least 12v at rest.

 

and if the battery is good, the aftermarket alarm might be a problem.

 

perhaps interference from that big military installation.

 

Hello I recently bought a 05 Prius model T3 and the central locking only work if I left my lights on usually after I stop the car close all doors work for about 20 sec or less after stop I can only open the car with the metal key but is only open the driver one I change the car 12v battery same issue I also charge the key fob battery still no charge wired thing a few days ago was working fine after stop again I think something is cutting the power down and don’t have any ideas from where to start

 

I am having this same issue, just wanted to know, if someone found some solution around this? I can't leave lights on as that will drain the battery overnight. any solution?

Thanks in advance for any help you possibly could lend.

Regards,
Hemant

 

We had something like this happen not so long ago with our (non-SKS) Prius and I'm going to go with what bisco said:

Our case was a little different as it made no difference if the lights were on and there was no delay before the remote lock wouldn't work. Our remote locking worked fine away from home, so I tested it 10 or so meters (~15 ft) from our driveway and it still worked fine. I then drove the car progressively toward our driveway a couple of meters at a time and the locks worked fine until I was in front of our neighbor's driveway, which was only a couple of meters from ours and from this point on (and in anywhere in the cul-de-sac to which our driveway exits), the lock/unlock did not work. When I drove down again past our neighbor's driveway the locks worked. Interestingly a Prius with SKS worked fine (both remote and SKS lock/unlock) when this was happening to our non-SKS Prius. I never located any source of RF interference and just as suddenly as it started it stopped, three or so days later, and the locks have been working fine ever since.

We had the same scenario (as I described above) years ago too, thinking back on it. Never got to the bottom of it at that time either.

In this instance, I thought maybe it was the fob battery and was going to change the battery, but it measured 3.2 V so I concluded that that was not it and did not change the battery.

So, I would be looking to see what devices use the same frequency as the remote locking and see if you can track down any device that uses that same frequency. Unfortunately, I don't know what frequency would be for the local areas above (even if I knew where HA3 – maybe Harrow, UK?) was.