Need help. Central locking stopped working.

Try the fob as close as you can get it to the remote locking receiver, which I *think* (need to check for 4.2), if I remember correctly, is around the nearside D post.

(Just to try and eliminate any 434MHz interference that may have popped up in your location).

Well, fairly certain now the receiver is between what I suppose is the B and C post on yours? Anyway the rear glass on the nearside. Under the trim there. You're fairly close to it by the passenger door handle anyway.

So the chances are

1. The receiver has gone deaf (This is usually least likely)

You or neighbours got anything new recently that's "wireless"? (not wifi, but more like alarm, weather station etc)

So unlocking the RAV4 from the passanger side of the car, I started it up and took it out for a drive . Parked up and was able to lock the car from some distance from all sides😠 .....what’s going on with the signal been blocked/interrupted on my drive ?
Side note...Peugeot Rifter and Renault master vans both unlock as normal 🤔🤔

Knowing Toyota I suspect they are all compatible, but I'd put money my on the fact that you'd be wasting yours by buying one.

By driving to another location and having no problems, you've effectively proven there's nothing to gain by swapping it.

As far as the vans go, well, not all RF receiver (or transmitter) designs are made equal:


1. For a start, they don't have to be operating on/in the same frequency/band. 868MHz is also available, although most are 434MHz (and also used to be 315MHz and probably still is in US/OZ). The homologation page in the handbook or even the back of the key may tell you.

2. They don't all use the same transmission mode or coding format. Some formats behave better or differently, to some or all type of interference. There's the usual AM v FM argument, but it's not that simple in practice.

3. They don't all have the same local oscillator tolerance over temperature, meaning some have to have a wider front end filter and/or IF filter, meaning they potentially "let in" more interference than others.

4. They don't all have the same front end 1dB compression point and/or the related 3rd order intercept point, which means some will start to misbehave before others, in the presence of the same level of interference.

5. Some are just plain more sensitive than others. That can be a good and bad thing.

6. They don't all "connect" to bit stream decoding software in the ECU that is well engineered. A certain Solihull 4x4 manufacturer had at least a couple of vehicles with questionable things in this area.

7. Compression points (and therefore interference performance) can be improved by using more current in the mixer, but these receivers have to operate on very low current consumption, (or alternatively have some form of duty cycle).

8. Other stuff I've forgotten at the moment.

Trust me on this. I have history in having to attempt to put "sticking plasters" on somebody else's, poorly performing, in production, design. Although it was 20 odd years ago and RF silicon has come on beyond all recognition since then.

There were from the mid to late nineties, to at least early 2000s, some fair poorly performing designs around, but they are/were designed down to at max a few quid cost, so you can't expect totally robust performance. Most of the time they do quite well, all things considered.

I told you, you wouldn't thank me.

Hopefully Bob, the interference will go, or source be discovered.

The weather station is down the side of the bungalow and is maybe 20m from the RAV4, and not in sight of each other .
By chance the weather stations low battery display has come up but it doesn’t say if it’s the base station or the remote....well unless anyone can make sence of the instructions 🤔

www.clarkeservice.co.uk/manuals/leisure/wcp150.pdf

Guess pull all the batteries and see what happens !