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How many people have non working factory keyless entry?

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Old 08-21-13, 01:14 AM   #166
JJPeds
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Default My problem resolved

Quote:
Originally Posted by O. L. T. View Post
I'm about to dig deeper into the Sc wiring than we've seen in DIY's and need to know how many suffer problems with the factory keyless.

If you've replaced your battery and it still doesn't work, post here. This DIY will have a pictorial walking you through the proper checkpoints, wires, and items to check. Where to probe for voltage, WHAT to probe for voltage, resistance, etc.....

This is a really big task, so I need to know how many people need it. When I am done with the DIY, you will be able to diagnose and fix your keyless system in about 30 minutes.

The DIY will include pics, writeup, explanations, measurements of resistance, voltage, circuits, and anything else related to the keyless system.

Post here if your keyless is on the fritz.
After several months of dysfunction, outside investigation discovered a pirate radio station in the area. That station was broadcasting on a frequency that was interfering with Lexus keys in the neighborhood. Once it was shut down, the keys once again worked. I will provide further details on request.

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Old 08-26-13, 12:43 PM   #167
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Works intermittently. Would love to see your solution.


1993 SC300
Manual Transmission

Last edited by DaBunny; 08-26-13 at 12:47 PM..
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Old 09-20-13, 03:37 PM   #168
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Default Factory keyless

I just noticed that there is no flashing lights or sound when I set the alarm. When unlocking , it still flashes and chirps?
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Old 04-11-14, 12:35 AM   #169
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Bump. will try this asap!!!
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Old 04-11-14, 01:03 AM   #170
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I see a crack around the solder but its still intact so should i solder that ?
[IMG][/IMG]

on the other hand when i looked under the chip.
Does that mean i need to solder that or both?
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Old 04-11-14, 11:47 AM   #171
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Quote:
Originally Posted by ThatSCguy View Post
I see a crack around the solder but its still intact so should i solder that ?
[IMG][/IMG]

on the other hand when i looked under the chip.
Does that mean i need to solder that or both?
I reflowed the joint in your first picture + new battery it has been working well.
to be precise I used a suction tool to remove old solder and redo it.
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Old 04-13-14, 02:08 PM   #172
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Quote:
Originally Posted by SC3coupe View Post
I reflowed the joint in your first picture + new battery it has been working well.
to be precise I used a suction tool to remove old solder and redo it.
Awesome I'll try that out. I've never soldered anything whatsoever in my life so I'm gonna go purchase one. By suction tool what do you mean exactly when you removed the old solder? Did you somehow melt the old solder and sucked it up with the suction tool? thanks for the quick response btw
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Old 04-15-14, 06:25 PM   #173
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Myremote key/keyless entry system was working great on my RX300 until yesterday. While replacing an actuator motor in the passenger door locking/unlocking system, the alarm system went off briefly until I put the key back into the ignition. Now the remote unlocking system does not work. It also does not work with my spare key which has a fresh battery. Any idea how to diagnose what is broken and what is required for repair?
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Old 04-15-14, 10:52 PM   #174
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I removed my driver's side panel while working on a broken actuator and unplugged the electrical wiring while the battery was still on (which I should have not had) and left it unplugged for more than an hour. Now my key wont work to unlock or lock the car. Trunk button was working fine but now has stop working as well. Really need help on getting it to work again, key comes in great use !!! Hate having to manually lock and open the car
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Old 07-09-14, 10:35 PM   #175
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I'm glad that I've attempted to solder the connecting points despite the fact that they looked like they were still intact. This walk through fixed the loss of range and reliability issue like a charm!

Thanks again, OLT for an awesome DIY write up!

I'm enjoying much longer range (~20ft) compared to before (~5ft).

PS - On a side note, I've found what looks to be a production date inside the remote. My SC's birthday is 3.17.1995!?

Click the image to open in full size.
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Old 07-14-14, 03:41 PM   #176
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I have a RX-300. My keyless entry quit working after a completely dead battery. battery in keys OK. It will be great when you post instructions for diagnosos and repair!!
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Old 07-14-14, 03:43 PM   #177
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This is approximatley what happened to me. My remote key quit working after completing repair replacement of the right front door lock actuator motor.
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Old 07-14-14, 03:43 PM
 
 
 
 
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10, 92, controller, entry, factory, fob, key, keyless, lexus, page, paper, remote, reprogram, reset, sc300, sc400, scs

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