2005 Dodge Grand Caravan, Factory VTSS Disable, No Fobs
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=148435
Printed Date: November 22, 2025 at 11:56 AM
Topic: 2005 Dodge Grand Caravan, Factory VTSS Disable, No Fobs
Posted By: aviator172
Subject: 2005 Dodge Grand Caravan, Factory VTSS Disable, No Fobs
Date Posted: November 05, 2025 at 11:31 AM
Hello!
I have a 2005 Dodge Grand Caravan with factory Mopar VTSS. How would I completely disable the factory VTSS if I do not have a working key FOB and if I try with a Diagnostic Scan Tool I get the option to enable or disable the VTSS, but it does nothing when changed (stays active, ignores the change)?
If you can help, THANK YOU!
Replies:
Posted By: aviator172
Date Posted: November 06, 2025 at 8:42 AM
By the way.....
In my XTool D8, it is showing that the factory alarm already IS DISABLED.....but it still blinks in the instrument panel and still sets when I lock all the doors and I cannot change the status to ENABLE or DISABLE (No response to the change)
Posted By: aviator172
Date Posted: November 13, 2025 at 5:43 PM
I suspect there is a programming issue with this model vehicle.
There are MANY reports of issues with the remotes and VTSS with the 2005 model.
I removed the BCM and thoroughly inspected the PCB and tested all the easily test-able components. I found no flaws.
If there is an issue with the BCM programming, that would be especially difficult to diagnose.
The BCM has an 80 pin microcontroller MC68HC912B32
I am going to extract the flashed data from the device to see if I can find anything. I may attempt to decompile it for the purpose of correcting a manufacturing defect.
This is not an easy task and may not result in success.
There is also a possibility that there could be a PCM or FCM issue and I am working to diagnose those components through parts substitution and reprogramming replacements with the proper VIN and Flash information.
I have use my oscilloscope to rule out grounding or voltage issues with the PCI-Bus.
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