Ok , need some help .
I have just installed a new boot switch into my 2002 LS430 , the boot switch has has not been used since I've had the car due to the melted cover syndrome !!
Now all of my smart key stuff works , however the remote boot button does not open the boot .
The light on the remote works when you press the button but the boot does not open .
Before anybody suggests it the valet thing it definitely is unlocked and yes I tested the new switch to make sure it works .
So is there anything I'm missing ??
I might add the self closing boot thing also works .
Does the boot switch have its own fuse ??
I think its pretty unlikely there is a broken wire in the boot or suchlike as not only is there no evidence of that and I've checked with the boot inner off as well as one can , plus the car has not been rear ended or anything like that .
Usually I can solve/fix these kind of things but I'm a stumped on this one .
I feel I'm just missing something obvious and simple ??
I might add that I cannot seem to unlock the doors or lock them with the remote but the red light goes when you push the button and the button on the door handle locks the car easily which suggests the problem is with the car not the remore especially as the boot switch doesn't work either . .
Please any thoughts ??

 

What happens when you pull the "unlock the boot" lever down by the parking brake release? If that unlocks the boot then your remote is suspect.
Also, you say first that ""all my smart key stuff works" but then later "I cannot . . . unlock the doors or lock them with the remote" which would seem to indicate your remote might actually be the problem with unlocking the boot.

 

On the LS the boot/trunk does not open by itself. The button just unlocks it. You still have to lift it.
If you press the button to unlock, can you then lift the boot?
Sorry if I am stating the obvious. :-)

If you have another master key, try with that as it may be that the key isn't correctly programmed.
In fact, from your comments that the remote buttons do not work for the doors either, I suspect that only the SmartKey aspect was programmed.

Does the boot release switch by the steering wheel open the boot?

 

.....also make sure its not locked out ...ie....lock above the parking release brake handle.

 

The boot release button on the dash works .
Read my post , it's Not the valet lock !!
The smart part recognises the remote , the little flashing red light goes to green when the key is in range so the remote is programmed in .
When I push the lock button on the outside door handle the red light on the remote flashes .
As far as I'm Aware if the remote light flashes when you press the buttons then the remote is working as the light is set up like a failsafe, if the light flashes then the remote works .
The unlock button on the boot lid itself doesn't unlock the boot.....that's nothing to do with the remote .
I know the lock is powered up as the dash lever unlocks the boot .
I will investigate a bit more towards what the remote activates oyn the car .

 

the boot release button on my remotes does nothing but the red light does light when pushed. boot does not open. it does open with inside switch and switch on the boot itself.

 

Interesting , similar but my boot switch on the boot doesn't work either .
Something is out somewhere and I'm pretty sure it's not the remote , however the easiest thing to do first is get hold of another remote and programme it in .
I only have the one remote but I will get another then I will know if it actually is the remote....or not !!

 

I'm guessing you probably know and/or tried this but on my 03 the fob boot/trunk button isn't like the door buttons - you actually have to push and hold it for a couple seconds until you hear the car beep and then it unlocks. The doors are instant but the boot requires a couple second button press/hold

 

Yeah I tried that but will double check just in case .

 

Nope that didn't work , it's also not a fuse as there's other stuff on the same fuse that works beside the fact I have tested all the fuses .

 

Very much sounds to me like the transmitter in the key is busted, even if the LED flashes.
Either that or else the key is not programmed to the car 100% correctly.
Lets see what happens when you have another key programmed to the car.

When you touch the door buttons, the car queries the key via RFID or similar short range system.
When you push the button it uses the 315/433Mhz remote frequency system to transmit to the car.
Perhaps the boot release button also uses the 315/433Mhz system?

Are you certain that yours is the SmartKey? I ask as the Owners Manuals only show the SmartKey from 2004-2006.

SmartKey


Older models key

 

Yes mate I'm bright enough to know a smart key , for instance I don't have to insert the key to start the car and I push the button on the door handle to lock it and I use my hand to unlock it .
Your information is incorrect .
You can see from this link early and face lift key difference , the pre face lift has a longer **** on the fob .
https://www.aliexpress.com/item/4000...xx__1662161839

 

Looks like I've found why my boot doesn't unlock either with the remote or the switch on the lid !!
corrosion on the receiver and what I think is the controller ??

 

Pics of the inside !!

 

Check out this thread of someone who had the same issue and how they fixed it.