New battery in key remote

Old 01-15-2008, 07:02 AM
Thread Starter
Join Date: Jan 2008
Posts: 1
Default New battery in key remote

I have a 1994 LS 400 that did not have an owners manual when I purchased it. I have recently replaced the battery in the key remote but the remote still won't work. What do I need to do?
Old 08-20-2008, 10:11 PM
Join Date: Aug 2008
Posts: 2
Default RE: New battery in key remote

I had the same problem with a 98 remote so I went to Lexus and bought one of their remote batteries and had them install more problems.
Old 08-21-2008, 09:59 PM
Junior Member
Join Date: Aug 2008
Posts: 27
Default RE: New battery in key remote

Your Security problem is most likely caused by a faulty ignition switch and passlock sensor.
The PCM and BCM will set DTC's to aid with the diagnosis of your problem.
A Real Auto Dude Drives Safely
Old 08-22-2008, 04:18 AM
Join Date: Mar 2007
Posts: 24
Default RE: New battery in key remote

i agree with khooper,

IT could be youre immoblizer.. where after you replace youre batter remote it couldnt reconized.

suggest to go to lexus dealer to check & diagnosis the faulty...
Old 09-23-2008, 03:53 PM
Join Date: Sep 2008
Posts: 4
Default RE: New battery in key remote

Don't listen to Khopper and rockerfella, they don't know what they are talking about. A 94 LS does not have an immobliser system and there are hardly ever failures in the ignition circuit. No DTCs will be set because this OBD I system has only the very basic codes. Your most likely culprit is the key itself which happens fequently on this model. There is a test the dealer can do to check the signal. If it is, in fact, the key you would have to order a kit which includes two new keys and a ROM chip for the wireless ECU. Unfortunately, a new key cannot be programmed to this sstem. Sometimes you just have to bite the bullet and take it in.
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