GS - 2nd Gen (1998-2005) Discussion about the second generation GS300, GS400 and GS430 (1998 - 2005)

99 Lexus gs300 security light on car won't crank!!

Thread Tools
 
Search this Thread
 
Old 06-30-17, 08:03 PM
  #16  
Rara1989
Driver School Candidate
Thread Starter
 
Rara1989's Avatar
 
Join Date: Jun 2017
Location: Tennessee
Posts: 12
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by FrankT
You need techstream to read the body codes. You most likely have B2796 No Communication In Immobilizer System


You might just need to get your key reprogrammed. Have you tried another key?
yes I've tried my valet key too and I have a wallet key too same thing with each
Old 06-30-17, 09:10 PM
  #17  
FrankT
Instructor
 
FrankT's Avatar
 
Join Date: Nov 2005
Location: Cedar Park, Texas
Posts: 996
Received 49 Likes on 42 Posts
Default

You may be looking at a new TRANSPONDER KEY COIL ... This is the Part Number: 8978230010 that I came up with, at Under $30. And straight forward replacement...

It might be worth getting a proper diagnoses to eliminate the guess work.
Diagnostic Procedures

Here are the parts involved...

Last edited by FrankT; 06-30-17 at 09:19 PM. Reason: added Diagnostic Procedures link
Old 06-30-17, 10:01 PM
  #18  
Rara1989
Driver School Candidate
Thread Starter
 
Rara1989's Avatar
 
Join Date: Jun 2017
Location: Tennessee
Posts: 12
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by FrankT
You may be looking at a new TRANSPONDER KEY COIL ... This is the Part Number: 8978230010 that I came up with, at Under $30. And straight forward replacement...

It might be worth getting a proper diagnoses to eliminate the guess work.
Diagnostic Procedures

Here are the parts involved...
thank you frank I really appreciate it. also I'm wondering what Lexus would charge for labor and part in something like this
Old 07-02-17, 03:21 PM
  #19  
Rara1989
Driver School Candidate
Thread Starter
 
Rara1989's Avatar
 
Join Date: Jun 2017
Location: Tennessee
Posts: 12
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by Rara1989
thank you frank I really appreciate it. also I'm wondering what Lexus would charge for labor and part in something like this
Ok this is weird but if you move the steering wheel while your cranking it will start up I've just done it a couple times
Old 07-02-17, 06:47 PM
  #20  
rgarjr
Lexus Champion
iTrader: (1)
 
rgarjr's Avatar
 
Join Date: Feb 2004
Location: Southern California
Posts: 1,938
Likes: 0
Received 1 Like on 1 Post
Default

The immobilizer is inside the ECU. So if it starts giving u problems u need to change out the ECU and of course u have to program it to your key (Unless u find one that come with its key as well).

Had intermittent issues with mine, and had to change out a few things (new key transponder, key coil, key amplifier) and finally the ECU.

Last edited by rgarjr; 07-02-17 at 06:56 PM.
Old 09-20-17, 09:27 AM
  #21  
AzNGman07
Driver School Candidate
iTrader: (2)
 
AzNGman07's Avatar
 
Join Date: Jan 2015
Location: Texas
Posts: 17
Received 0 Likes on 0 Posts
Default

That's what I hear as well. Probably best solution for us with this stupid issue ^

Originally Posted by Rara1989
Ok this is weird but if you move the steering wheel while your cranking it will start up I've just done it a couple times
LOL, that's funny, because I did the same thing and security light went away. Have you resolved your issue permanently since then?
Old 09-20-17, 09:46 PM
  #22  
TW99GS300
Lead Lap
 
TW99GS300's Avatar
 
Join Date: May 2014
Location: WA
Posts: 410
Received 41 Likes on 36 Posts
Default

This link explains how generally how the Toyota / Lexus immobilizer system works. http://www.instructables.com/id/DIY-...-or-Swapped-E/
Your issue is unlikely the ECU. The data storing the key info is unlikely to get corrupted.
If by moving the steering wheel and the issue goes away, I would check these 3 components. 1. key sense switch. 2. Transponder key coil. 3. Transponder key Amplifier.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Dave209
RX - 2nd Gen (2004-2009)
17
06-03-19 01:12 PM
Metlupass2
GS - 2nd Gen (1998-2005)
11
03-25-19 11:04 AM
Bus7250
LS - 1st and 2nd Gen (1990-2000)
15
06-14-13 08:39 PM
99GSoc06
GS - 2nd Gen (1998-2005)
2
10-04-11 06:16 PM
pinto096
GS - 2nd Gen (1998-2005)
4
03-27-11 09:00 AM



Quick Reply: 99 Lexus gs300 security light on car won't crank!!



All times are GMT -7. The time now is 01:04 AM.