Hey guys, I installed this unit (DMH-A4450BT) in my car less than a year ago and I have noticed that whenever I use the stereo when the car is in battery/accessory mode for too long, and then if I proceed to start the engine the unit will restart and then go into a bootloop.

However,if I don't use it in accessory mode for too long and I directly start the engine the unit never has problems, what could cause this?

My unit has a pinhole reset button so I keep a pen in my car to reset the unit whenever this happens but I have to set all my steering controls again! But doing this makes the problem go away so I can use the system in accessory mode again without worrying for a few days.

This is really annoying because sometimes I'll be sitting in my car and I have to listen to music without the engine running but I fear that the system will go into a bootloop and I have to go through the hassle of resetting again.

One more thing I observed is that even if I do let the unit run for sometime in accessory mode, but if I turn off the car completely and come back later to turn the engine on the bootloop doesn't happen, almost like the unit resets itself on its own if I leave it alone for some time. 

Can someone please give me some insight on what this problem could be? Is it a problem with the motherboard or a faulty SD card like how the other pioneer units have? Or maybe a wiring issue?

I had a similar problem = rebooting when listening to radio after restarting the car. I had a different model radio (Z110-BT). The problem went away when I replaced the car's battery. So it is possible you battery is starting to fail even though it can start the car. How old is the battery?

your problem is with the radio power supply
when the engine starts, the voltage drops to a minimum level and the radio reboots

can be solved by installing an additional condenser.

On 1/19/2024 at 4:39 AM, RonS said:

I had a similar problem = rebooting when listening to radio after restarting the car. I had a different model radio (Z110-BT). The problem went away when I replaced the car's battery. So it is possible you battery is starting to fail even though it can start the car. How old is the battery?

Hey! I replaced the battery a year ago just before getting the stereo installed, I don't think its an issue with the battery.

I noticed that the radio doesn't always reboot when I start the engine, sometimes it goes through just fine without rebooting.

18 hours ago, asd255 said:

your problem is with the radio power supply
when the engine starts, the voltage drops to a minimum level and the radio reboots

can be solved by installing an additional condenser.

 

 

 

Is this a car specific thing? I don't really understand what any of this means so I will probably have to ask a shop to do this for me but thank you!