My 2020 RGL has RDRS with Traction Control and Vehicle Hold Control (often called Hill Assist). It has never had any problems and I've used VHC many times. The bike now sports Dakota Digital MLX-8414 Gauges which will show the various RDRS settings, just like H-D gauges. In any event, no issues until a couple weeks ago when I noticed I had no VHC working. Nothing I've tried has resolved the problem. Studying the speedo gauge which displays the RDRS features, I have 'TC' which stays lit continuously when riding. A push of the TC switch will produce the cloud indicating the wet road setting. A second push and it disappears. I do not have the illuminated 'H' for VHC, nor do I see the usual 'tire' emblem for Traction Control:



I hope someone has insight as to what may have happened, and what my next step is. Thanks.

 

I am not sure. Have you gone into the odometer menu diagnostic mode to view and reset the fault codes? Make sure you record it before you clear it. I dont remember the procedure but it's easy and it's easy to find with a little google-fu.
the main reason I'm posting here is because I have a similar issue. My 2020 sgs has an abs fault. I dont remember the code but I looked it up and all I could find was the ecu is not communicating with the abs module. My abs works fine but my traction control and hill assist doesn't work. I have been dealing with it since it happened. Nope no warranty. I voided that before I had 1500 miles on the bike by installing a cam, pipes, intake and a tune from fuel moto. My abs fault occurred when I did a burnout in my garage. I remember trying to do it and it wouldn't let the back tire break loose the first few attempts and as soon as the red and amber lights came on I was able to break it loose. Now all because I had a few too many beers one night my tc no longer works and I just don't want to throw parts at it until it works so I am just posting here to get some insight to your issue. I do not, I repeat. I do not want to hijack your thread.

 

To see your fault codes, press and hold the trip odometer reset switch on left handlebar control, while turning ignition switch to ON.

Release trip odo reset switch when DIAG appears on odo display.

Press and release trip odo reset switch a couple times till BCM is displayed.

If you see BCM N displayed, you’ve got not codes.

If you see BCM Y displayed, press and hold trip odo reset switch until code is displayed, and release.

If you want to clear codes, press and hold odo reset switch till CLEAR is displayed.

Beyond that I got nuthin’ if it’s out of warranty.

Do you guys still have TPMS functioning? Not having to get on my hands and knees to check pressure is my favorite part of RDRS.

 

Thanks guys.

Yes, I actually checked the codes last evening. On the ABS I'm getting C1032 which I understand is a problem with the front wheel speed sensor; either a 1) bad sensor, 2) short in the wire, or 3) broken wire/open circuit.

I also have a C1100 code which I think indicates a possible wiring issue within the ABS.

I've obviously got the codes recorded. Debating whether to clear the codes and see what happens, though I realize it will do nothing about a problem if one exists.

I do have TPMS working normally.

 

These bikes had ABS before RDRS came along in 2020, so if TPMS is working, which is part of RDRS, I wonder if this is just isolated to ABS. I would think ABS would be integrated with RDRS, but that’s just a WAG, ...and now I’m just babbling.

Just re/read the first post. Other components of RDRS not functioning. Ugh. A head scratcher.

Reminds me of when I sold a 2006 Cadillac while it was still in warranty once I learned it was $1000 to replace a headlight.

 

The mods you did voided only the powertrain portion of your warranty so the question to ask your dealer would be, "is the RDRS system considered part of the powertrain?"

For best results don't mention the "whiskey throttle" incident in your garage.