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We just bought ours in May & immediately the knob started to malfunction turning the volume up and down rapidly yet it always worked on the steering wheel so we sort of turned a cheek to the issue. I’m seeing a lot of people say it’s the type of knob but ours just started to do it on the steering wheel volume buttons as well so how does that explain the knob theory? Does this mean it’s a bigger issue, maybe electrical. If anyone has any input or insight on any of this i’m looking for answers on forums before eventually taking it in to hopefully get it fixed. Has anyone had the update done? Does it help?
 

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We just bought ours in May & immediately the knob started to malfunction turning the volume up and down rapidly yet it always worked on the steering wheel so we sort of turned a cheek to the issue. I’m seeing a lot of people say it’s the type of knob but ours just started to do it on the steering wheel volume buttons as well so how does that explain the knob theory? Does this mean it’s a bigger issue, maybe electrical. If anyone has any input or insight on any of this i’m looking for answers on forums before eventually taking it in to hopefully get it fixed. Has anyone had the update done? Does it help?
We've seen a lot of them, but I've never heard of one misbehaving at the steering switches. The ones in the wheel are a completely different system with different wiring and connections than the encoder in the radio. In fact, they don't even connect to the radio. They connect to the instrument cluster, which then passes the signals to the radio via CAN communication. So it follows that you must have two separate issues, the "bulletin" problem with the radio encoder plus (most likely) an issue with the spiral cable or the switches on the steering wheel.
 

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Hey everybody. I recently bought a 2019 Altima S and my volume knob is malfunctioning. When I turn the volume knob the volume level rapidly skips around. The way I have to actually adjust the volume is by using the volume buttons on the steering wheel. Going to the dealership in a few days to have this issue looked at. Has anyone experienced this?
I also have an altima sl and the radio has been doing the same thing, i fixed it myself in about 30 seconds. get some wd40 with the spray straw attachment, a rag, now with the car and radio off.
  1. gently pull the volume knob straight out from radio, it will just slide off with your fingers
  2. hold rag against radio under the knob hole, make sure the foam ring behind the knob is out with the knob.
  3. spray WD40 with the straw inside the knob hole, dont be afraid to flood it out. you want it cleaned out.
  4. work the knob post with your fingers turning it back and forth and all around in circles and push it on and off several times.
  5. spray again and clean up any drips and runs, dont worry WD40 does not conduct electricity and is not combustible. if anyone remembers back in the old days it was used to clean and displace water or moisture inside the cars distributor cap.
  6. replace knob by just pushing it back on easily with the foam replaced the way it was removed.
  7. give it a try, you radio should function like new, let me know if this works for you or not, if your radio hasnt been damager in another way this will work for you.
 

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I also have an altima sl and the radio has been doing the same thing, i fixed it myself in about 30 seconds. get some wd40 with the spray straw attachment, a rag, now with the car and radio off.
  1. gently pull the volume knob straight out from radio, it will just slide off with your fingers
  2. hold rag against radio under the knob hole, make sure the foam ring behind the knob is out with the knob.
  3. spray WD40 with the straw inside the knob hole, dont be afraid to flood it out. you want it cleaned out.
  4. work the knob post with your fingers turning it back and forth and all around in circles and push it on and off several times.
  5. spray again and clean up any drips and runs, dont worry WD40 does not conduct electricity and is not combustible. if anyone remembers back in the old days it was used to clean and displace water or moisture inside the cars distributor cap.
  6. replace knob by just pushing it back on easily with the foam replaced the way it was removed.
  7. give it a try, you radio should function like new, let me know if this works for you or not, if your radio hasnt been damager in another way this will work for you.
Good info! That makes perfect sense, since most of the problems are from dirty encoders which the firmware isn't debouncing properly. That's all the firmware update does, change the debounce timing in the program to make it more resistant to a glitchy signal. I'm sure we can't wash them out like that for warranty purposes unless Nissan changes their procedures to recommend it, but for units past warranty I'll be trying that out. Contact cleaner may work too and will be less messy and smelly, I'll try that too. Thanks for posting this!
 

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You dont want to use contact cleaner or eletrical cleaner of any type, some switches come lubed inside and you dont want to wash this lube out with a contact cleaner, wd40 is an oil based lube that will clean dirt out and not wash out the factory contact lube if the switch was manufactured with any.
 

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You dont want to use contact cleaner or eletrical cleaner of any type, some switches come lubed inside and you dont want to wash this lube out with a contact cleaner, wd40 is an oil based lube that will clean dirt out and not wash out the factory contact lube if the switch was manufactured with any.
The fact that WD40 can get in there at all indicates the seals are either crappy or nonexistent. That's why I was surprised to hear that WD worked. It never occurred to me that Bosch might use an unsealed part, or I would have tried it myself long ago. Lube can't possibly be a problem, those things are Gray encoders and not pots. If they're conductive at all then it will be conductive plastic, but most likely they're optical.
 

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To update this, so far we've used WD40 on two customer cars and it worked on both. One of the two needed a shot of compressed air along with it, I suppose to force the WD past the bushing. Contact cleaner seemed ineffective, I think it was evaporating too quickly to get inside where it needed to be. We couldn't make either encoder misbehave after treatment with WD, even when spun momentarily with an electric drill. I'd say the technique is easy and effective, we'll be doing more of it. Thanks @randyleeseger12, great find!
 
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