yeah I unplugged the battery, unplugged both of the amp cables, checked the fuses. None of which alleviated the issue. Still dealing with the intermittent sound being on/off.

 

OK peepz, not only is this freaky, weird, sketchy, & xtrmly annoying, I am NOW 100% convinced amp-speakers-SOUND is intermittent, not to mention random (depending on the day... LOL).

 

my refurbished amp is supposed to come in this Monday. Will let you know if it fixes the issue as soon as I install it.

 

hey @Is350Zyzz, did you go with re-furbished, how'd it work out, what are the considerations & costs versus getting the amp repaired? thx!!

 

I'd like to get any advice that might be available for the same situation.

2014 IS350 Fsport, ML system, approx 90K, garage kept, half its life in Las Vegas, half in Florida.

First loss of sound was 6 months ago, replaced sunroof vents in the trunk, removed amp, opened amp and no signs of corrosion or water damage, sent to United Radio and they found no issues and updated the software. Put a small damp rid bucket in the trunk and it sound restored. I believe this is due to drying out the amp while it was removed and having it sit inside in lower humidity.

Last week, lost sound again, seems to have been paired with the car being in outside in the rain and then pulled into the garage. There was/has been super high humidity for several days.

Current trouble shooting.
1. AMP fuses good.
2. System check has a B15C3 present, a B15A3 past, a B15DB past, a B15D0 past.
3. Sealed the passenger side sunroof trunk vent, when removed the rubber seal that is exterior to the trunk was wet. No signs of moisture in in trunk area.
4. Sunroof(?) drain line IVO amp is unclogged, no signs of water or moisture.
4.1. No signs of corrosion on amp connectors.
5. Passenger side foot well shows no sign of moisture, kick panel amp connector not checked.
6. Removed center console, inspected amp connector, no damage, no moisture, no corrosion.

After all the trouble shooting, remove and reinstall amp, driving for 10-15 with AC on, sound is back after a full off/on cycle.

Questions:
This is most likely an amp problem, right? The loss of sound is seeming pairing with large amounts of rain or high humidity. ​​​Will new, used, or refurb amp not just have the same problem?
The amp probably past UR inspection due to the dry out period?
@Is350Zyzz how is your refurb amp?

@LaZeR is you loss of sound paired with high humidity, driving through water, or rain? I think the sound restoring through AC running is probably from reducing the humidity?

 

Probably
Probably
Probably
Probably

If I had your situation, I’d likely extend the amp connection wiring and mount the amp above the floor, instead of in its current hole.

 

@atislexus 100% NO CLUE!! Also, I'm more of an "open windows" guy over & above AC. All this time my sound is STILL Intermittent & Random every frickin day. For example, I drove cross state for thxGiving, no sound driving for a couple hours, stopped at a Rest Area along the hiWay, started up again, and there's sound for the rest of the drive. Got to the east coast sound stopped again, started the next day, and the same story as above driving back home. Was also waiting for @Is350Zyzz to RE-post.

Not exactly objective nor scientific but try to be patient for as long as me and just leave everything the way it is.

How Much $$ did United Radio charge for the check up plus Shipping costs back & forth right?

 

No charge for the inspection and the software update. Cost me ~$30 to ship it to them. They shipped it back at their expense. They also turned it around in less than a week.

For the inspection I did have to agree to flat repair charge of ~$475 if they didn’t find something wrong. They didn’t charge me this in the end.

u



unrelated to your question about cost. When the sound is working I do not have B15C3 code.

 

So they did everything for FREE + return shipping at THEIR cost - why'd a business wanna LOSE money??

Don't understand - do you mean "flat repair charge of ~$475 if they DID find something wrong"?

 

When they received it they gave me a call, said it would be $475 to repair the AMP. I said ok, they ran tests and looked at it. They found nothing wrong and shipped it back to me.

 

Sounds like we have the same problem. Did you find a solution?

I know the car is 10 years old or close to it but given Lexus's reputation and how wide spread this issue has been for years, I'm still disappointed that there is no official support from the company. There should be a recall or at minimum a service bulletin that provides an official solution. This is definitely my LAST Lexus/Toyota product.

 

Just so you know, each time my amp stopped producing sound, the volume controls still worked. Meaning, the display would show the volume bar graph increasing and decreasing as I turned the volume ****. But no sound. My amp was definitely water-damaged.

 

@LaZeR I'm 4 weeks into my latest trouble shooting and repairs. I have not had issue with the sound since.

I sealed the passenger side sunroof vent flap. I used some glue to glue the rubber flap, then tapped over it with some tape. In hind sight I would have removed the vent and tapped over the hole. I added some silica dry bags next to the amp, and also refreshed a damp rid container I keep in the trunk.

My plan will be to swap out the bags in a couple more weeks.

Even here in Florida it has been low humidity with the colder weather, I hope these fixes will last once the rain starts back up and the humidity sets in.

 

Hey guys did anyone figure out what this can be ….

I own a 2017 is350 f sport suddenly my music stopped working i can’t raise the volume lower it or even see the volume “bars” on the top of the navagation ….

i figured it was the amp i replaced the amp and still nothing now i have an audio specialist telling me its “probably” my radio which i don’t believe him and im really not trying to spend 1200 on a radio for him not to be 100% sure

does anyone know what else this can be… or what else i should check

Thank you in advance

 

In my case, 2015 is350 fSport rwd, I left everything intact / UN-touched and sound has been INTERMITTENT for over 4+ months. Review my posts on this thread if you'd like.

MOST with the same issue CAN see the Volume bars up / down, as well as tuning stations, so in your case it's weird that you can't -- the audio tech MIGHT be correct in your case.