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rickprice
Newbie


Joined: 08 Jun 2017
Posts: 35



PostPosted: Sun Mar 24, 2019 10:19 pm    Post subject: Japanese PCM system Reply with quote

Hi folks,

I am thinking of updating the PCM and have been looking for some time.

One thing I am worried about is that when you remove the PCM you also remove the ability to control the car functions.

But in Japan, it seems the stereo may have been optional. Does anyone know how the various functions are controlled in this instance? Is there a separate unit?

Cheers

Rich
 
  
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deMort
Long Beach


Joined: 21 Mar 2015
Posts: 6761
Location: Brighton


PostPosted: Mon Mar 25, 2019 7:39 pm    Post subject: Reply with quote

What car have you got .. gen 1 or 2 ?

By update do you mean you want to replace the pcm with an aftermarket unit and not a software update ?

What actual functions do you need to alter ?

I can code any function at work with a tester so if you are talking about locking then it can be coded via a tester and its in the door control units and not the pcm .

I have no idea about the japanese units .. each market has some differences but not separate control units just in case you want to fit a non Porsche item .

Little confused atm Smile
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rickprice
Newbie


Joined: 08 Jun 2017
Posts: 35



PostPosted: Mon Mar 25, 2019 10:11 pm    Post subject: Reply with quote

Many thanks.

I have a gen 1 and want to swap the head unit to something that can cope with multimedia.

If Japanese cars ship without a stereo (IF), then there must be a separate module for controlling car functions, no? This might be fitted somehow alongside the new stereo.

If not then I am barking up the wrong tree.

I realise I probably won’t want to change when the lights dim etc but if this functionality can be retained then fantastic.

Does this make sense?

Rich
 
  
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James M-S
Suzuka


Joined: 11 Apr 2017
Posts: 1011
Location: Derbyshire

2009 Porsche 997 Carrera 2

PostPosted: Mon Mar 25, 2019 10:18 pm    Post subject: Reply with quote

You can change when the lights dim through the PCM?

What else can you control?

Does this work on Gen2?
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Manual 997.2 c2 :Basalt + gtechniq : H&S + Gundo
 
  
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murph7355
Trainee


Joined: 20 Mar 2012
Posts: 56



PostPosted: Mon Mar 25, 2019 11:47 pm    Post subject: Reply with quote

James M-S wrote:
You can change when the lights dim through the PCM?

What else can you control?

Does this work on Gen2?

I believe so:

Setting light options
Setting the fade-out time
You can set a fade-out time of between 10 and
120 seconds for your vehicle's tail lights and front
fog lamps.
1. Press the button.
2. Press the button or touch the tab of
the same name in the header.
3. Select "Individual memory"
> "Light"
> "Fade-out time".
4. Set the time desired period by touching the
two symbols and or by turning
the right rotary knob.
The setting is immediately applied.
The "Fade-out time" setting also changes the
illumination duration when unlocking the vehicle.
To find out more about this, please refer to the
chapter "Welcome home function" in the owner's
manual.


The full PCM3 manual is available online for download.

- options for locking the doors, including auto-lock
- light dimming
- orientation light (one behind the rear view mirror)
- DRLs
- air con defaults
- wiper settings

I think most/all of the above are linked to whichever key you use and I doubt anyone would really miss any of them Smile

The std PCM also gives Trip details, and Chrono info.

OP - responded on PH Smile I think the best bit is to look at the manual for the PCM version in your gen1 and decide if anything it offers will be missed. I suspect the answer will be "not as much as you gain" on a gen1.
 
  
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Cannop
Trainee


Joined: 27 Feb 2018
Posts: 53
Location: Berks/Oxon border


PostPosted: Tue Mar 26, 2019 10:40 am    Post subject: Reply with quote

Just configure your settings before you upgrade, that's what I did.

I think the JDM "no stereo" spec would just mean those cars wouldn't be able to do any of the parameter configuring that would normally be done via the PCM.
 
  
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Phil 997
Le Mans
Le Mans


Joined: 05 Dec 2015
Posts: 15263
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Thu Mar 28, 2019 8:32 am    Post subject: Reply with quote

Cannop wrote:
Just configure your settings before you upgrade, that's what I did.

I think the JDM "no stereo" spec would just mean those cars wouldn't be able to do any of the parameter configuring that would normally be done via the PCM.


Rick I think cannop is right the Japanese cars would be preset and no further adjustment possible from the head unit which is exactly what we do over here when we upgrade the PCM to aftermarket double din unit. now what I am not sure of is whether they can then plug in a durametric and adjust those settings as they wish in the future. Thumb your correct though there was no PCM for the Japanese market and Porsche supplied a double din fascia and the cars were fitted with an aftermarket head unit.

Heres a pic of a genuine Porsche supplied DD fascia for the Japanese market that I had a few years ago. it had a 997 part number on the back of it.
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