Compustar FT-DC3, 2011 GMC Sierra, RAP Disabled If Remote Started?

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=146989
Printed Date: April 29, 2024 at 6:59 AM

Topic: Compustar FT-DC3, 2011 GMC Sierra, RAP Disabled If Remote Started?

Posted By: xxrzdxx
Subject: Compustar FT-DC3, 2011 GMC Sierra, RAP Disabled If Remote Started?
Date Posted: August 18, 2021 at 10:50 AM

Everything works like expected, however if the vehicle is started remotely before driven, once the ignition is turned off (even after driving the vehicle) the radio turns off right away. The radio doesn't stay on like it does when started with the key alone. It's as if the remote start doesn't realize that it has been taken over with the key, and acts as though it was remotely shut down and needs to deactivate the retained accessory power. Is there a setting I am missing for this, or is this the expected behavior? I did not use the T-Harness, I used the same wires I had used previously with the ADS-ALCA, and didn't experience this.

2011 GMC Sierra
Firstech FT-DC3-HC

Thank You

Replies:

Posted By: audiokid1
Date Posted: August 18, 2021 at 9:02 PM

Kind of odd that the module is not recognizing the takeover when you put the key in and press the brake pedal. How frequently do you remote start the truck and don't get into it before the remote start times out? If the answer is never...then you may consider removing the Remote Start's RAP shut down wire from the trucks door pin. (purple/black wire in this diagram)
posted_image

Posted By: xxrzdxx
Date Posted: August 19, 2021 at 4:32 PM

I considered that. I don't have that wire connected so it would just be a matter of changing the programing to analog instead of data in the settings.

It really is the only thing that I noticed that functions differently compared to a Viper unit with the ADS-ALCA. I would have imagined that since they are both idatalink, that they would be similarly designed to interface with the databus.