Ok, I've made some posts about my blind spot monitoring and rear cross traffic assist not working.

Well, I figured it out. I scheduled an appointment with the dealership. However, I decided to check the basics first. So, I started with the fuse box. It's in the cargo hatch. Well, the fuse for the BSM was barely in there. I simply pushed it in and tada, the system now works!!

If any of you have a new F Type and have issues with the BSM, check the fuse.

Also, I pulled fuse 15 and OMG, its like a new car! It is so raucous!! The crackles and pops are there and it is ridiculously loud. Best mod ever for free and it takes 5 minutes.

 

I found the horn fuse in my then one year old R wasn't fully seated. They must a have weak person doing the fuses!

Regarding F15 - don't you get the same raucous behaviour in dynamic mode?

 

No! It is absoluty brutal compared to dynamic mode. Even in dynamic mode, the valves are closed until about 4000 rpm or so. Then they open. With the fuse pulled, the muffler valves are open all the time and it is just obnoxious at all RPM and way more crackle pops like the older SVRs. Trust me, it is night and day different.

 

I do trust you - it seems that the 2021 models are much quieter, my MY18 opens the valves all the time in dynamic. I suppose Jaguar knows what it's doing ...

 

My MY18 definitely does NOT open the valves all the time in Dynamic. I have active but non-switchable exhaust, however, so I don't know if that makes a difference or not.

 

Valve opening seems to vary between MYs and models from the same year it seems! My valves open all the time in dynamic, whille in non-dynamic with the switch active the vales open around 1500 rpm. The difference is very obvious at tickover. Mine is an early MY18, built in March 2017. Maybe just predated the ongoing silencing attempts ....

 

Same here. March 2017 MY18. When I first got the car it was noticeably loud and barky, but a visit to the dealer before I knew better resulted in the H239 campaign being applied to the car. To me, it's been neutered not just at start-up but all the time. I've pulled the F15 fuse and drive it Dynamic Mode and it's still not as loud or poppy as it was in Normal Mode with the fuse in place when I first got it.

 

I had one update when mine went in to fix a CEL (fuel pump connector not securely plugged in!) and some leaky diff seals, but all it seems to have done is force the reset of dynamic mode on startup. No noticeable (to me) difference to the crackles and pops. But it's not been near a dealer since, apart from having the parcel shelf replaced - no software update needed for that!

 

yeah, JLR wanted to make the new ones more refined by taking the exhaust a bit. I think the main culprit is the muffler valves stay closed more often. Again, for a 5 minute fuse removal, it is like adding a $1000 aftermarket exhaust.

 

Well, my BSM still isnt working properly. After a little while, it faulted again. The driver side BSM module has some sloppy wires compared to the pass. Side. After some jiggling, still doesn't work. I pulled the fuse again to check it, reinstalled it and it worked again. Seems like it will work for a bit after pulling and replacing the fuse. Ugh. I hate trips to the dealership.

 

Well, my BSM still isnt working properly. After a little while, it faulted again. The driver side BSM module has some sloppy wires compared to the pass. Side. After some jiggling, still doesn't work. I pulled the fuse again to check it, reinstalled it and it worked again. Seems like it will work for a bit after pulling and replacing the fuse. Ugh. I hate trips to the dealership.

 

I would try installing a new fuse, you never know. Strange things happen.

 

Does this fuse 15 only affect Type Rs? I have a MY 2017, built 2016, Premium. Its snarl disappeared. It's a manual trans, switchable AE. I get some additional rumbles in Dynamic mode with AE on, but nothing like it was.

 

Yours might have Fuse 43 under the passenger side floor instead of 15 because of the 2016 build date. However, pulling the AE fuse (15 or 43) will work on all cars with active exhaust. It just leaves the valves open all the time. Very easy to do (and undo if you don't like it).

 

I think, but am open to correction, that F43 switched to F15 at MY18.

 

Which fuse is the possible culprit for imtermittent problems with cross traffic warning?

 

Cgo, have you found that cabin noise is uncomfortable when freeway cruising for example ? I have found that my 2021 has definitely gotten louder with the valves open but not in the dynamic mode as I have put more miles on it. In the manual mode above 4000 rpm I get a lot of crackles when I back off the throttle. Fun when driving on the twisties around here. But I also like a quiet cabin on a long freeway drive when listening to music too.
I think I'll pull fuse 15 today and go for a run and see the difference. Any danger of long term damage to the cats from having the valves open all the time ?

 

I’ve found with F43 pulled (MY14 V6S) and the roof closed, it drones at highway speeds, unacceptably for longer trips. I use a wireless relay and key fob to switch F43 in/out.

 

I pulled fuse # 15 and went for about a 20 mile drive down the winding highway. It is without a doubt much louder. And louder than when in the standard drive mode with the valves open via the button on the console. With the fuse out, if you press the console button it blinks a few times, probably to show a fault, and then the light goes out. I had the transmission in the Sport mode and was using the paddle shifters. It was not however in Dynamic mode.

It started to roar at about 2000 RPM instead of the usual 3500 RPM and I was getting crackles and pops as low as about 2200-2300 RPM when letting off the gas. It was fun, but I'm not sure that I'll leave the fuse out. I'll need to make a short freeway run too and see if it is unbearable. Too bad the console switch doesn't get the exact same effect as pulling the fuse. DJS has a good idea with a relay but I don't want to go to that effort while the car is still under warranty.

But did I mention that it was fun ????

 

Dynamic mode should give the same effect as removing the fuse (it does in my MY18) - the button is not, IMO, very useful except for turning off the noise in dynamic mode.