Just had the 4100 installed at BestBuy a couple days ago. The 4100 will not power on until the car has been started for at least 1-2 minutes. I did update the firmware to 1.03 after the install. Can anyone tell me if this is normal or possible an issue with the install?

It's not typical, but there's no way to know what be "normal" in your particular car.  The radio begins booting immediately when it has power on the yellow and red wires (12v battery and 12v ACC) and a valid ground on the black wire.

I'd bring it back to Best Buy and ask them to wire the harness properly.

I have seen this a couple of times. I just shut the car off and turn the key to ACC, and it usually boots fine, then restart the car.

My guess is the unit is shut down in some state that takes forever to boot. Not sure what that is at this point, but it happens so infrequently it would be impossible to trace.

If this is happening every time you start your car I am guessing it is another issue. Does it behave this way when you boot the unit on the ACC position?

strange mine has done the same thing... start the car and the deck doesnt power up, have to turn the car back off and restart and it powers up fine. Is sporadic come and goes it seems.

Now that I think about this a bit, I'm guessing this is a timing issue. When you start a car, your head unit is connected to power when the switch goes from LOCK to ON... then it is disconnected from power while the starter motor is engaged, and reconnected to power after the starter motor is disengaged.

Bet there is a certain interval, where the unit is is powered, unpowered, and powered up again where it takes forever for it to startup again. Leave the switch at the on position for a moment before engaging the starter and I bet this never happens.

My car (2015 Subaru Forester) has keyless entry/start so I can not just turn on the ACC. The car fully starts. 

I was just worried that I have a defective unit, but it sounds like it's common. Hopefully a firmware update will resolve this in the future.

My car (2015 Subaru Forester) has keyless entry/start so I can not just turn on the ACC. The car fully starts.

I think if you press the start button with your foot off the brake, it is the same as going to Accessory mode with a key. Pushing it again with foot off will turn it back off.

Hopefully a firmware update will resolve this in the future.

Don't hold your breath waiting for a firmware upgrade

I also have a 2015 Forester with push button start and I have the exact same issue. Although it takes 30 seconds to a minute to start. I have to think it is caused by the push button start. When I use acc it works fine. It is annoying that my previous kenwood had absolutely no problems.

damn, my car (Subaru WRX 2015) does the same thing!!! Its driving me crazy! However it's not always 1-2 minutes after the car started, sometimes is a little bit longer. It's a pain!

2012 scion tc push button. Same issue. Really annoying.

I have the same problem too.  I have a 2009 Honda Accord, no push button.  It doesn't happen often, but it does happen.  At first I thought it was cause it was reading or connecting to my iPod or iPhone, so I then made sure to have those devices disconnected, but the problem accured again.  So I don't know what the problem is.

Just had the 4100 installed at BestBuy a couple days ago. The 4100 will not power on until the car has been started for at least 1-2 minutes. I did update the firmware to 1.03 after the install. Can anyone tell me if this is normal or possible an issue with the install?

do you have a push button start vehicle?

I too have had this occasionally. I have found this headunit to be EXTREMELY buggy. I have installed the latest firmware and re-installed the firmware to see if it would correct my issues but it hasn't. If I wasn't going on a road trip at the end of the month is send it off to Puoneer for them to check it out but who knows how long it will take to get it back.

Yep, I a have this same problem as well.  2000 LX470.  Firmware 1.0.3. 

We have this problem on our 2008 MDX which was retrofitted with the 4100.  Our dealer insists it is not normal.  I'd say it happens at least a couple of times a week but does not happen most of the time.  Definitely seems to be timing related and I've noticed it happens more frequently if I start the car and immediately put the gear selector into reverse.

Not sure if a line capacitor or some other change in the wiring would buffer power to the unit and cure this.  Dealer wanted to replace (but did not have any stock)... from reading this thread it seems as though this is "normal" for at least some of us.  Pretty annoying.

Some of the other annoyances we've had definitely appear to be carplay related as the problems have improved/changed as iOS updates have been delivered with no change on the FW of the Pioneer deck.... but the unit not starting happens even with no phone connected so pretty sure it's Pioneers fault.

Kind of disappointing that Pioneer has updated older headunits than the 4100 and no FW update to 4100 in almost a year... guess they've already abandoned it.

I get this issue occasionally with an avic f77-dab. It's actually installed in an Isuzu d-max pickup. I've noticed that it could be timing issue. If I turn the key to acc then slightly hesitate to then start the truck it can then go into that long boot up/appear to be off and take a minute or so before it starts to boot proper. If I turn the key straight through acc to start it'll come on then off and then on again into boot without issue. If I turn the key to acc and hesitate longer so unit is half booted up it'll turn off as the engine starts and then come on again and start to boot again as normal.

So it seems it could be a timing issue and there is a point in the boot process that it doesn't like being robbed of power. It is correctly wired in, in my case and has only happened a few times. If it was going to be an issue I thought about putting a switch in the acc feed to the head unit so that there was no power to head unit until truck was started and then throw the switch to allow the pioneer to boot up in peace. Seemed like a major pain to have to do that! So long as I turn the key straight to start the engine all is fine.

I had mine replaced after pioneer tech support insists this is indicative of a defective unit. Replacement does the same thing indicating pioneer tech support are idiots.

I have not re-contacted pioneer tech support and have not seen yet if 1.0.5 has any affect on this issue.

Okay, still happens after 1.53 update and as a bonus problem the BT does not upgrade on the radio as part of the update.

Dealer has agreed to replace our unit with one of the post-CES Kenwood units coming out to see if we still have the problem with a different manufacturer radio.  Pioneer really blew it with a variety of things for me including their snotty tech support.  The dealer had offered to get us into a 2016 model year Pioneer unit but we will just switch to Kenwood, they seem to also be getting good reviews on Amazon, etc.

this is odd, I just installed my 8100 and Im having this same issue!!!! its happened about 10-12 times since I installed it nearly 2 weeks ago.......

I have solved with this http://www.phonocar.it/it/accessori-autoradio/accessori-elettrici/convertitori-e-riduttori-di-tensione/stabilizzatore-di-tensione-12v/05146.html

It is a gap in start up of 12 v

I have solved with this http://www.phonocar.it/it/accessori-autoradio/accessori-elettrici/convertitori-e-riduttori-di-tensione/stabilizzatore-di-tensione-12v/05146.html

It is a gap in start up of 12 v

No, the unit start when you turn on your car, but it doesn't reboot for low tension.

My 4100 has been doing the same thing... Starts up fine most of the time, but about 30% of the time it won't turn on for 1-2 minutes, usually when I could really use the backup camera! Glad to see I'm not the only one. I did install the 1.053 update a few days ago and it has not done it since then, but I suspect the problem is still there.