I have Bose, Nav, BT and DAB - just not the Sports Plus/Chrono, so it seems that the latter is definitely the culprit. Really pleased that you guys have finally got a fix. It's a terrific add-on for the car once it's working as it should.

 

I'm gonna give it another go if Kimi sends me the new power cable AND some spare ribbon cables in case anything happens to my OG ones.

 

Good idea to ask for some spare ribbon cables. I managed to damage one of mine putting the PCM back together. I exposed a tiny bit of conductor on one of the threads. Fortunately, it was either on a non-connected pin, or my 'repair' fixed it. I put a tiny drop of superglue on top to act as an insulator and seem to have got away with it. I was lucky it didn't wreck the cable. I shall take extra-extra care when I install the board into my wife's Cayman.

 

The new firmware is in, operation is normal, I haven't had a chance to 'verify' that the Isudar board will 'let go' of the phone in a reasonable amount of time yet.

 

That sounds like a good idea, but it won’t work. AA uses WiFi as it’s primary data connection. AA on your phone is looking for that WiFi signal and it then connects BT. It also re-enables BT if you try and turn it off or switch to a different device. As long as AA is enabled on your phone it’s actively looking for that wifi signal from your car. I’ve tried switching to my homes wifi and the phone just switches right back to the car wifi. As a whole it makes sense. If you get in your car you expect your phone to auto-connect and you want it to stay connected, not hop back and forth between the car and any other random wifi signals that your phone has seen before. It would be frustrating if AA disconnected everytime you pulled up next to a Starbucks because it remembered the wifi signal.
Putting the phone into Airplane mode or deleting the wifi networks are the only methods I’ve found to disconnect my phone from the sticky Isudar board. Both are a major hassle.

The real solution is to get the Isudar board to turn on/off it’s WiFi signal at the expected times. So hopefully the newest firmware works for y’all.
Good suggestion on automating though. It’s useful for several other scenarios, but I think the phone is going to fight you here and it won’t work.

 

Understood. I don't get why I don't have this issue at all. I initially thought it might be because my car, when parked, is 60 feet from my home and I figured that even if the Isudar board was still trying to find my phone, it was too far away (and my house has walls that are 3 feet thick stone). But my Isudar drops its connection when I shut the car down, which is what I'd expect it to do.

I'm not quite clear on what is meant by "so long as AA is enabled on the phone". I don't make any special attempts to shut down AA when I leave the car. I assumed it shut down when I switched off the car, but that may not be right. Where is the issue originating? Is it the Isudar board, or AA on the phone, or both together? The other thing I don't get is that when my car has been shut down, I assume the PCM shuts down too and that will kill the power to the Isudar board, so presumably once that happens, the board can't be responsible for the phone any more? So is it just AA on the phone that is constantly looking for the Isudar board? But if it is, and it can't find it, then surely it releases the connection, just as it does when I leave Starbucks and my phone is no longer in range of their wifi?

As you can see, I am pretty confused about it. As I don't actually have the problem, my interest is only academic, so while I'd appreciate your help in trying to understand this, please don't invest your time unless you feel like doing so! Thanks.

 

That is what should happen, you open the car door, and the system comes alive, finds your phone connects in and is ready by the time you start your engine and the PCM boots up. Conversely when you arrive at your destination turn off the vehicle and remove the key from the ignition the Isudar board should shut down its connection to your phone.

The thing was it was not doing this, not only would it stay connected for hours after turning off the engine and removing the key and if I opened the rear hatch the Isudar board would grab my phone if it were in range and not let go!

The latest firmware that I received from Isudar (M230703V1) is supposed to fix this, but they did say that about the last FW upgrade they sent me for this problem (M230221V1) which initially seemed to help but ultimately did not. We'll see.

 

What I don't understand is how the Isudar can do anything at all once the PCM has powered off when you turn off the car and remove the key. The Isudar board is powered from the PCM., so is your PCM staying alive even with the ignition turned off?

 

Try this in your vehicle, open the driver's door, watch the dash, see if anything lights up, the entire system is full of computers, opening a door and signals are sent, the PCM may not immediately light up but that doesn't mean it hasn't received a signal to wake up.

Remember, the Isudar board was powered up and talking to the phone long before the ignition was turned on and in fact even before the key was inserted, all I had to do was open the back hatch on the Macan and the Isudar board connected to my phone, turned on the phone BT and connected in.

 

OK - I did the test. Sequence of events was: I opened the car via the driver's door. The gear indicator red spot came on telling me the car was in Park. Nothing else illuminated and the PCM remained blank. On my phone I watched as it connected to the Isudar board! So you are right there. I then closed the driver's door, locked the car and started to walk away, all the time watching the BT connection on my phone. Before I had taken three steps, the BT connection was closed. I kept on watching as I got to my front door - the BT connection to the Isudar was attempted again, one time, but this time it registered as 'could not connect' and that was it. BT is active on my phone as I sit here, and nothing is connected at all, including the Isudar.

So what is the explanation? Mine is working as it should but yours isn't (wasn't?) so there is clearly some difference between us. Could be the car, or the phone or the Isudar board, so it's a pig to track down. If it helps, my PCM is 3.1 running the latest FW. My phone is a Samsung Galaxy S20+. My Isudar FW details were posted a few posts back and, IIRC, were the same as yours until the very latest FW from Isudar. (Mine are unchanged from the image posted).

(As previously posted, the car is a 2015 Panamera and has satnav, BT phone, Bose, DAB radio (that's a UK thing similar to the sat radio in the USA). I have Sport mode, but no Sport Plus/Chrono, which has apparently caused a voltage surge but which has had a cure made by inserting a resistor or something into the harness).

 

Ah-hah! I figured it would try to connect in. I too have PCM3.1 and it is a V4.76 firmware, the Isudar board was at the same level as you but is now slightly newer. Interesting that yours is working, can you confirm that yours also uses WiFi as this is how the Isudar board was turning back on BT on my Pixel 7 Pro. When it was 'broken' the only way I could break the connection ws to turn Airplane mode on the phone, essentially killing both WiFi and BT.

My wife just got home in the Macan, BT is turned on for the Pixel 7 Pro, but it has not connected to the phone, which I am sure it would have done by now, this is a good sign. After lunch I will stand next to the vehicle and open the door and note what happens. I expect it to connect in when I open the door, but not remain connected if I do not put the key in the ignition and simply close the door. What I would expect is what you described, a relatively quick drop of all connectivity to the Isudar board.

 

This exact same issue happened to me. I bought, what seems to be, the latest board from Amazon. Says 2022 isudar wireless CarPlay. I followed videos and made sure all the cables are snug and properly installed.

Plugged it into the car, got CarPlay but fm radio was playing instead of my iPhone… I figured, I’ll mess with it later as it’s probably some Setting. Tried to slide the damn pcm in and adjust those cables behind… for good 5 minutes… then the radio came on on its own and black screen. Tried a few things… nothing. Got worried that I fried my PCM… I took it out and removed isudar board and everything seems to be back to normal.

I reset the pcm just for ****s and giggles… but noticed my aux Bluetooth isn’t showing up. At this point, The PCM is on the bench and I’m contemplating if I should try this board again, or bail and request a refund from Amazon. Worried I’ll fry the damn PCM and then what 😏

 

Anyone having an issue where you have to resync wireless carplay from your phone to the board after a couple of times having the phone connected.

 

Hi - I will check the wifi later and report back.

 

If you saw carplay on the PCM screen, then at that point the connections etc (and the Isudar board) were good. FM radio was playing because you hadn't switched to the PCM's AUX input. I sometimes do this on purpose - listen to FM radio while running satnav (without voice instructions) on the Isudar Android Auto interface).

What has happened is that you have disconnected a cable somewhere when pushing the PCM back into its cage. Could be the main quad connector - make sure that is fully seated, and the clip gives a good, positive click. Also check the 2 connectors to the Isudar board on the main cable.

Since you got Carplay up on the screen, your internal connections are OK, so don't open the PCM again and disturb them until trying the above.

EDIT: You don't need AUX BT for the Isudar board to work. It isn't showing up because you are connected via BT to the Isudar board. Force a BT connection to the PCM and AUX BT will come back,