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Replacing PCM3.1 with Erisin Android head unit DIY

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192K views 683 replies 106 participants last post by  ktm981  
#1 · (Edited)
(EDIT: basic installation instructions and short review: Outstanding Tech Contribution! - Replacing PCM3.1 with... )

I have an absolutely useless PCM3.1 in my 981S, and it was depressing from the get go. Every winter during my Boxster's hibernation I wanted to throw that pathetic POS PCM into the trash and replace with something nice, but every time I checked there were no units that would tick every box in my virtual checklist for ideal unit.

Well, when I checked this year - it looks like there is finally a unit, that on paper does absolutely everything I wanted. The biggest requirements
  • Navigation and music library without phone
  • wireless Android auto
  • wifi internet + movies
  • mechanical knobs
  • perfect fit with matching bezel

So no matter how busy I am, I decided it's time to stop being lazy, and bring my otherwise perfect Boxster into modern times.
Here's the link in case somebody want to follow... or to lead :)


I did not see manual, and have absolutely no idea how hard it will be to install, but how hard can it be, right?

DIY to follow

EDIT: If you are looking for a detailed install guide and parts list, especially for a car with a Bose system, check out hestenet's post here on page 3: https://www.planet-9.com/threads/re...sin-android-head-unit-diy.253721/post-2211813
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#2 ·
Very interesting device and reasonably priced.. The rear layout looks plug and play for the Porsche connectors. It includes an antenna - I assume for GPS. It also has a SIM card slot - I assume for the 4G connectivity. In the US that requires an additional charge on most carriers. WiFi I assume connects to your phone, it seems to have a USB cable - I guess for thumb drives or an iPod. Android Auto or CarPlay provide the GPS? If so - that's going to involve your phone and the SIM 4G connection. I see no mention of built-in GPS functionality, but as you say - it's also a bit short on any manuals that describe what it really does.

I'll be watching with great anticipation. You're ordering it for delivery in the US? Any idea of the shipping cost or where it gets shipped from?
 
owns 2009 Porsche Boxster Base, PDK
#3 ·
Yes, by the description it can have it's own internet (which I am not going to do, no need), or wifi from the phone. And it's suppose to have it's own GPS and maps. I assume it will have usb on a cable that you can hide somewhere in the glove box. We will see. At this price I'm willing to try.

Shipping was $70 from Hong Kong ( ouch) for the total price of around $332.
 
#4 ·
I looked at the brand in general - they make a LOT of models, including other ones for 987/981's - but one thing I didn't see on any of them is an option for Sirius/XM. No connector on the back of them (it's a DIN type connector) for the Sirius/XM receiver to plug into.. I'd say that might be a factor against it - but Sirius/XM now has an Android app - so maybe not so much... it just wouldn't be directly from the satellite, but if you have Sirius/XM on any other vehicle (or the home version) the Android one doesn't require another subscription.
 
owns 2009 Porsche Boxster Base, PDK
#5 ·
I looked at the brand in general - they make a LOT of models, including other ones for 987/981's - but one thing I didn't see on any of them is an option for Sirius/XM. No connector on the back of them (it's a DIN type connector) for the Sirius/XM receiver to plug into.. I'd say that might be a factor against it - but Sirius/XM now has an Android app - so maybe not so much... it just wouldn't be directly from the satellite, but if you have Sirius/XM on any other vehicle (or the home version) the Android one doesn't require another subscription.
That’s what I do. Wife’s Outback gets the subscription and I stream via the app. (BTW, never pay full fare for XM—call the retention department to cancel and they will provide a discount. I did that for 10+ years and now I seem to be locked in at a continuing discount rate)

/end hijack.

Shawn in VA (USA)
 
#6 ·
Really intrigued as to how you get on with this unit, I spotted it a few weeks ago on eBay and nearly bought it but couldn't find any information about it or a manual, or even measurements, so gave it a miss, but wish I'd bought one now, especially as the price on eBay seems to have tripled in the meantime!

Good luck and will be following with interest....
 
#9 ·
I'm interested as well... so I'll keep an eye out. My biggest peeve with most HUs these days is the lack of a volume knob. Buttons are slow and what's even worse is that my HU (a Pioneer with volume buttons) has two very annoying additional traits - first is that the mute button has a 4-second delay on it... that's just WAY too long. 1 or 2 seconds is plenty! Second annoyance is when you click the volume button, it does a popup on the display with more volume controls, and that covers the presets and prevents you from doing anything else until you tap elsewhere or wait another 4 seconds for it to disappear. Bottom line, you can't mute the damn thing quickly... and/or without having to look at the screen. So stupid.

Anyway, I'd love to see a volume knobbed HU... and this looks nice. I am afraid of the touch-style "home" and other buttons. I had a terrible experience with such things on a previous car (a Caddy, and they were incredibly unresponsive).. so hopefully you don't have that issue.

Incidentally, if you run into issues with wiring, I'm happy to help... I'm pretty good with this stuff. Do you have Bose or anything like that?
 
#10 ·
Just got a message from the Erisin guys asking if I need to add optical cable... Take pictures and send them if not sure

I don't think I have anything optical in my NON-Bose PCM? I guess I'll have to take it apart earlier than expected
 
#14 ·
It's shipped from HK with DHL, should be here pretty fast
 
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#17 ·
Nice to see you continuing to hack with your 981 T-Design! I think this looks like a really interesting project. The capacitive touch screen would be a really nice upgrade and if it is a perfect fitting bezel it would be nicer than a lot of the other aftermarkets.

My big question is how this is going to work with the ASK amp in your car (if you have SPP). Does it have speaker-level outputs or just line-level?

Can’t wait to see how it goes!
 
#18 ·
Mine just arrived, which was a bit of a surprise as on the order link it was still showing as "Awaiting shipping". It looks good! There is a GPS module included in the package, so that's a bonus, though not quite sure where to put it for best signal. Otherwise I'm hoping - probably unrealistically (!) - that it's fairly plug-and-play, but I'm sure something will crop up, no instructions at all for installation. Probably won't get a chance to try and install it for a few days, but will keep you posted on how it goes.
 
#19 ·
The factory GPS module (antenna) is mounted under the plastic cowl at the base of the windshield, starboard side, on an aluminum plate that's above the cabin air intake filter and below the plastic. That seems to work fairly well.. the antenna works better if it has a "ground plane" under it - which is what the aluminum plate serves as (also as a cover to the top of the air filter..) There are several rubber grommets behind the battery area that you can use to route the wiring into the cabin.
 
owns 2009 Porsche Boxster Base, PDK
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#23 ·
Quick update - I managed to install mine last night (replacing CDR-31 without SPP) and IT WORKS!!
Still need to finesse the installation a bit and route the USB cables and GPS antenna properly, but basically took out old unit, plugged in the Erisin and it just fired up.
Steering wheel controls seem to work straight away.
Only thing seems to be that the small display screen to the right of the tacho displays the audio source as something Chinese!
I need to play around with it a lot more but Carplay works, and does split screen display so you can have Spotify on one half and Waze on the other half, for example.
For the price I'm very impressed: screen resolution is so much better than the old CDR-31 and sound quality seems better too, the FM radio even works properly now which was always terrible on the old unit. Even the surround of the screen matches the interior plastics well - see pics below. All in all I recommend it as a great cheap alternative to the Joyeauto & similar route. Will update further when I've had a chance to play around some more.

Image
Image
 
#261 ·
Quick update - I managed to install mine last night (replacing CDR-31 without SPP) and IT WORKS!!
Still need to finesse the installation a bit and route the USB cables and GPS antenna properly, but basically took out old unit, plugged in the Erisin and it just fired up.
Steering wheel controls seem to work straight away.
Only thing seems to be that the small display screen to the right of the tacho displays the audio source as something Chinese!
I need to play around with it a lot more but Carplay works, and does split screen display so you can have Spotify on one half and Waze on the other half, for example.
For the price I'm very impressed: screen resolution is so much better than the old CDR-31 and sound quality seems better too, the FM radio even works properly now which was always terrible on the old unit. Even the surround of the screen matches the interior plastics well - see pics below. All in all I recommend it as a great cheap alternative to the Joyeauto & similar route. Will update further when I've had a chance to play around some more.

View attachment 287083 View attachment 287084
What is SPP ? I have a CDR with Bose does it have an optical connection to the amp? If so does the optical connection work ?
 
#24 · (Edited)
Congrats Rich! Fit & finish are perfect, sound quality is better and works as advertised. Good to know that it's a plug and play for the basic CDR31 non-SPP. Pls keep us updated on where will you install the GPS, microphone and the USB cable. I am also interested to see how the AUX audio input cable pass through the glove box. Did you get the reverse camera?
Thank you.
 
#37 ·
Do you have a greenish color when selecting white backlight (car setup app or something like that)? Or is it nice white?
 
#30 · (Edited)
Very nice indeed! Will it allow you to play YouTube while driving? I have a few concert mixes that I like to listen to while driving, so if it does I’m grabbing one!

Thanks!


Sent from my iPhone using Tapatalk
Even if it doesn't, usually there are ways to make video work during driving