Go Back   Club Lexus Forums > Lexus Model Forums > SC Models > SC 430
Sign in using an external account
Register Forgot Password?

Front windshield antenna 2002 SC430

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 10-14-13, 05:23 PM   #1
marty99
Rookie
Trader Score: (0)
 
Join Date: Aug 2013
Location: Fl
Posts: 63
Default Front windshield antenna 2002 SC430

Why is there an antenna in the glass on my 02 SC430? The radio antenna is at the back of the car. Does this have anything to do with the remote door lock on the car key?
Thanks, Marty
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
marty99 is offline   Reply With Quote
Old 10-14-13, 07:50 PM   #2
ShawnOk
Lead Lap
Trader Score: (0)
 
ShawnOk's Avatar
 
Join Date: Mar 2013
Location: Oklahoma
Posts: 721
Default

Our SC's have dual antennas for better AM/FM reception as well as for the media content (ie. TRAF, text display, station names, etc). I've disconnected the connection from my rear antenna and still only pull FM stations from the windshield. I'm not sure which is specifically responsible for the text on the display (rear or windshield) b'c I still have the power harness connected to the rear antenna motor. Both antennas have dedicated inputs on the back of the OEM radio. The one that runs from the rear is the factory standard Motorola type antenna cable, while the windshield cable is smaller in diameter and thus Lexus proprietary specific (as I was told by a Toyota service manager). Here's a little something I wrote up... http://www.clublexus.com/forums/sc-4...ns-please.html. According to the schematics I've seen at Sewell the radio receiver that recognizes the remote lock and car key is mounted near the ignition under the center footwell. I don't think the windshield antenna has anything to do with the security/keyless entry.

More info... http://lexus.sewellparts.com/oem-cat...C430-2002.html & http://lexus.sewellparts.com/oem-cat...C430-2002.html

Last edited by ShawnOk; 10-14-13 at 08:04 PM..
ShawnOk is online now   Reply With Quote
Old 10-15-13, 06:37 AM   #3
tfischer
Lexus Champion
Trader Score: (0)
 
tfischer's Avatar
 
Join Date: Feb 2001
Location: Cincinnati
Posts: 2,664
Default

My recollection is that the amp gets the signal from each of the antennae and uses the stronger one, a process which greatly reduces static and other audio annoyances.
__________________
2002 SC430 Black/Ecru
First Edition (April 2001)
-----
2004 RX330 w Nav/ML
and Thundercloud Grill
tfischer is offline   Reply With Quote
Old 10-15-13, 08:42 AM   #4
ShawnOk
Lead Lap
Trader Score: (0)
 
ShawnOk's Avatar
 
Join Date: Mar 2013
Location: Oklahoma
Posts: 721
Default

Quote:
Originally Posted by tfischer View Post
My recollection is that the amp gets the signal from each of the antennae and uses the stronger one, a process which greatly reduces static and other audio annoyances.
Sewell Diagrams don't show the antennas running to the amp. http://lexus.sewellparts.com/oem-cat...C430-2002.html
ShawnOk is online now   Reply With Quote
Old 10-15-13, 08:49 AM   #5
tfischer
Lexus Champion
Trader Score: (0)
 
tfischer's Avatar
 
Join Date: Feb 2001
Location: Cincinnati
Posts: 2,664
Default

I'm no radio technician, so by "amp" I meant "somewhere inside the radio stuff part of the car."
(Still, I think that's where wireless signals would go to get processed.)
__________________
2002 SC430 Black/Ecru
First Edition (April 2001)
-----
2004 RX330 w Nav/ML
and Thundercloud Grill
tfischer is offline   Reply With Quote
Old 10-15-13, 08:58 AM   #6
ShawnOk
Lead Lap
Trader Score: (0)
 
ShawnOk's Avatar
 
Join Date: Mar 2013
Location: Oklahoma
Posts: 721
Default

Hahaha, Yea I get what you mean. I did a lot of research before disconnecting my antenna and adding a hardwired FM modulator that is always on. I had a fear that interrupting the rear antenna signal would have more consequences, but luckily both cables plug directly to the back of the radio and there was no major loss of reception b'c the front windshield antenna was still active.
ShawnOk is online now   Reply With Quote
Old 10-16-13, 11:11 AM   #7
Harold57
Lexus Test Driver
Trader Score: (0)
 
Join Date: Aug 2006
Location: Texas
Posts: 1,513
Default

I believe that it is called a diversity antenna when two antennas are used for the same signal. That setup allows the radio to choose the best received signal. (Inches different in location can make a big difference in RF reception.)
Harold57 is offline   Reply With Quote
Old 10-16-13, 11:11 AM
 
 
 
 
Reply

Tags
430, antenna, connect, cord, glass, is300, lexus, lock, radio, remotekey, repkacing, sc, sc430, sound, windsheild, windshield

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
SC430 hard to reach parking light bulb marty99 SC 430 28 08-08-14 12:13 PM
Key and immobilizer matching to multiple vehicles marty99 SC 430 2 02-27-14 09:49 AM
FL WTB - gen 2/3 Nav DVD Disc marty99 General Classifieds 0 01-09-14 01:57 PM
FL WTB Drivers seat for Lexus SC430 Saddle leather marty99 SC430 Classifieds 0 10-08-13 03:19 PM
SC430 original Nav DVD upgrade or not? marty99 SC 430 8 10-03-13 09:07 AM

All times are GMT -7. The time now is 09:38 PM.

Join ClubLexus
Advertising


Copyright © 2000-2008 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS


Get all contact info