2014 RG wont start after alarm is disarmed

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Mar 9, 2019 | 11:19 AM

Morton Williamson

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Stage IV

Joined: Nov 2018

Posts: 4

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From: San Diego, Ca

2014 RG wont start after alarm is disarmed

The starter switch is non responsive after the security system is deactivated. Got lights and behaves as if security system has been disarmed. It will start only if the main fuse is removed and then reinserted. it will run and restart as long as the security system does not arm. If it arms I have to remove and replace the main fuse to start it. It behaves the same way with either the key fob or the pin-code is used to disarm the security system.

Anyone ever seen or experienced this?

Mar 9, 2019 | 09:09 PM

Mr. Mike

Road Captain

Joined: Apr 2010

Posts: 686

Likes: 349

From: Central Utah

Mort,
If the error codes are cleared, try your scenario again and see what new code(s) pop up. Certainly sounds like a T$$M issue to me, but you never know.

Mar 15, 2019 | 03:31 AM

Morton Williamson

Thread Starter

Stage IV

Joined: Nov 2018

Posts: 4

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From: San Diego, Ca

Mr. Mike,

Fault number: B1123HFSM left turn lamp (Hands free security module)Short circuit to groundIntermittent faultHistoric faultFault number: B1131AlarmOutput Shorted to GroundPermanent faultCurrent faultFault number: U1300Serial data busShort circuit to groundPermanent faultCurrent faultIm thinking about taking it to an Auto electric shop so that they could help locate the shorts......I believe that would be the most expeditious route...what do you guys think???

Mar 15, 2019 | 12:35 PM

batman.

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Joined: Jun 2014

Posts: 1,219

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From: westland Michigan

can you remove the alarm fuse or take the alarm out period and see what it does? sounds like its internal to the alarm itself

Batman

Mar 26, 2019 | 02:12 AM

Morton Williamson

Thread Starter

Stage IV

Joined: Nov 2018

Posts: 4

Likes: 0

From: San Diego, Ca

Update

Problem resolved...

Battery was putting out 6V instead of 12V.....
Replaced battery

Loose Battery connections
Cleaned and applied dielectric grease to terminals

Thundermaxx ECU failure
Swapped in Stock ECU.....starter/HFSM issue remediated

The Thundermaxx failure resulted in driveability issues. The maint port is non responsive and in service the Thundermaxx triggered the BCM , SDPO, and RAD DTCs. It could very well be that the firmware is corrupted due to the low voltages the battery supplied.... I'm going to reach out to Thunder tomorrow to service or replace the failed unit.

Thanks everyone for your help/input...