Remote Keyless locking system not working anymore...
#1
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Remote Keyless locking system not working anymore...
Hi,
After many years of using the remote keyless locking system in my 93 LS400, now for some reason it no longer is working. I have changed the key battery but that did not do it either. I am simply not getting a response from the car when pressing the button on my key. If I use the manual switch on near my windows the car locks fine and when I use the key holes on the doors to unlock or lock the car everything goes smooth.
I had in the past problems where the Remote Keyless locking system would not work for a few days but then it would start working again, but now it seems like a no-go!
Any ideas guys and gals? I believe the fuse is #10 but my dome light which is on the same fuse (and all other lights) are working so I don't thing the fuse is a problem.
Thanks in advance for your tips!
After many years of using the remote keyless locking system in my 93 LS400, now for some reason it no longer is working. I have changed the key battery but that did not do it either. I am simply not getting a response from the car when pressing the button on my key. If I use the manual switch on near my windows the car locks fine and when I use the key holes on the doors to unlock or lock the car everything goes smooth.
I had in the past problems where the Remote Keyless locking system would not work for a few days but then it would start working again, but now it seems like a no-go!
Any ideas guys and gals? I believe the fuse is #10 but my dome light which is on the same fuse (and all other lights) are working so I don't thing the fuse is a problem.
Thanks in advance for your tips!
#2
3UZ-FEEEE
iTrader: (2)
Sometimes its the antana within the key's remote (some had success soldiering it back) and sometimes its the receiver within the car.
I've searched for this and found a few threads in the SC300/400 forums, but never really fixed it on our old SC since it wasn't the key, and i did not have the time to replace the receiver.
I've searched for this and found a few threads in the SC300/400 forums, but never really fixed it on our old SC since it wasn't the key, and i did not have the time to replace the receiver.
#4
Lexus Test Driver
I opted to forget about the built-in keyless entry since its range is so limited and installed a Viper remote start that also locks/unlocks the doors from at least a 1/4 mile away. The OEM alarm still works as designed with this installed.
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#9
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so bacially to make sure I'm on the same page I'm going to need a new key? If so, where would be the cheapest place to pick one up? I'm sure the dealer will be an arm and a leg. Maybe ebay?
#11
In the trunk, behind the left side cover. there should be a silver ecu box. This controls the wireless door locks. It has a antenna cable going into I believe. It should be to the right of the antenna motor somewhere. This is your problem, if everything else has checked out fine.
I replaced this from a junk yard for $50.
Solved my problem.
I replaced this from a junk yard for $50.
Solved my problem.
#13
If you want to test the key transmitter. Get a small FM radio set the frequency to 94.9MHz and then press the button on the key transmitter, if there is noise when you press button, key is working.Your problem is on the vehicle side.I hope this helps narrow down problem.
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Thank you everybody for your help so far.
@DoktorYes - I did what you recommeded and there was no difference in the frequency signal/sound/noise of 94.9 so I'm probably coming to the conclusion that the key is shot.
One other thing that might have an affect on the receiver is that recently I've been noticing a slight small little puddle of water forming at the bottom of the trunk where the spare tire is located (near the round rubber seal). This water forms after it rains really hard which causes moisture and dampness under the trunk carpet and sometimes on the top of the carpet. One thing coming to mind is that the dampness could have affected the receiver in some way (moisture). Its just an idea. What do you guys think?
It might sound crazy but I think the water comes from the bottom of the car to the top into the area where the spare tire is. I do not think in any way there is a leak where the trunk door is.
I'm not sure, but I'm mostly leaning in the direction that the key is faulty and if so is Mikodo's kit the only option I have if only the key is at fault?
Thanks!
@DoktorYes - I did what you recommeded and there was no difference in the frequency signal/sound/noise of 94.9 so I'm probably coming to the conclusion that the key is shot.
One other thing that might have an affect on the receiver is that recently I've been noticing a slight small little puddle of water forming at the bottom of the trunk where the spare tire is located (near the round rubber seal). This water forms after it rains really hard which causes moisture and dampness under the trunk carpet and sometimes on the top of the carpet. One thing coming to mind is that the dampness could have affected the receiver in some way (moisture). Its just an idea. What do you guys think?
It might sound crazy but I think the water comes from the bottom of the car to the top into the area where the spare tire is. I do not think in any way there is a leak where the trunk door is.
I'm not sure, but I'm mostly leaning in the direction that the key is faulty and if so is Mikodo's kit the only option I have if only the key is at fault?
Thanks!
#15
Lexus Test Driver
iTrader: (1)
Up to you on how you want to proceed, but make sure you read all the notes about the Mikado kit before purchase.