best way to upgrade 690xv w/ remote start

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=105632
Printed Date: May 03, 2025 at 5:54 PM

Topic: best way to upgrade 690xv w/ remote start

Posted By: lexelite
Subject: best way to upgrade 690xv w/ remote start
Date Posted: June 23, 2008 at 10:33 AM

I have done all the research and ready to begin my upgrade this weekend. This is not my first alarm install, but the most complicated and risky by far.

I need some broad advice from any knowledgeable install gurus on these systems.

I have a Viper 690XV alarm currently installed with an add-on remote start interface (transponder bypass) on a 99 Lexus SC400. Has been working perfectly for 4 years.

Looking for more range, more channels, and a cleaner install.

Only problem is that I did not install the original alarm.

What is the best way to upgrade the 690XV system to the Python 990 (Viper 5900)?

Should I try to keep the existing remote start module in the car since it is working, or should I dump it for the 990 integrated solution?

I know there is a transponder bypass in the car, so I do not want to disturb more than I have to.

I am terrified at the thought of the car entering "locked down" mode and having the car towed to a Lexus dealer to have it unlocked.

Advice needed.

FYI- After system upgrade. Will be adding 2 530T's for remote opening windows and sunroof (1 touch operation on each).

Any input is GREATLY appreciated!

Replies:

Posted By: lexelite
Date Posted: June 23, 2008 at 11:31 PM

anyone? Just looking for general tips and cautions.

Posted By: dswift
Date Posted: June 24, 2008 at 1:22 PM

Pull the whole thing out and save the bypass mod. Re-install. Butter.

PS- Strip back new parts of the wire for your new connections. Another note. It's better to have one system for alarm or remote start or BOTH in a car than two different brains. Just thought i'de include that note.

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"dont ground out!"

Posted By: lexelite
Date Posted: June 24, 2008 at 1:35 PM

dswift wrote:

Pull the whole thing out and save the bypass mod. Re-install. Butter.

PS- Strip back new parts of the wire for your new connections. Another note. It's better to have one system for alarm or remote start or BOTH in a car than two different brains. Just thought i'de include that note.

This is pretty much the conclusion that I came up with. I will have "fun" locating and removing what I did not install.

I will keep the bypass in the same place and remove the rest (690XV plus 555U).

Not to mention solder all the connections and wrap electrical tape on all the wires.

Anything else that I am forgetting?

Posted By: lexelite
Date Posted: June 24, 2008 at 1:39 PM

Anyone know the if the default remote start crank time will work on the Lexus V8? Just any FYI's are appreciated.