ast 1 way fm auto locing doors

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=137664
Printed Date: May 14, 2025 at 8:56 PM

Topic: ast 1 way fm auto locing doors

Posted By: cobracdn
Subject: ast 1 way fm auto locing doors
Date Posted: November 12, 2014 at 1:21 PM

Just bought a used 04 Envoy that has a AST 1 way Fm remote, to which I believe is from Ultrastart.

My problem is the system seems to be autolocking the doors about 20 seconds after exiting the vehicle. If I unlock the doors via remote.. 20 seconds later it locks them all again. I'd really like to disable that feature.

The remote I have is the following
posted_image

Replies:

Posted By: cobracdn
Date Posted: November 12, 2014 at 3:32 PM

Seems once I interrupt the cycle by cycling the ignition on then off.. then don't lock the doors with the remote it will stay unlocked.. but once I use the remote to lock or unlock it reverts back to auto locking. Still can't seem to figure out how to disable it.

Posted By: kreg357
Date Posted: November 15, 2014 at 5:10 AM

It would be best to crawl under the dash and locate the Ultra Start control module. It is a little black box about 5" x 4" x 1" with a bunch of wires coming out of it. On the bottom side should be a white sticker that will have the model number. It might be something like U3560. Use that model number and this WEB site to locate the correct Install Manual, it will have the programming option tables and instructions for making changes :

Ultra Start WEB site : https://www.ultrastarters.com/manuals.htm ( It might be in the "Previous Products" section.)

That being said you might have a 35xx system. Here is a link to that install guide :

https://www.ultrastarters.com/manuals/Prev.Manuals/05_08/MAN-35XX-INSTALL-U-2005.pdf

The programming options table is on Page 15.

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