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TTW
Trainee


Joined: 28 Jun 2014
Posts: 61
Location: East Midlands

2004 Porsche 997 Carrera 2S

PostPosted: Mon Apr 29, 2019 5:47 pm    Post subject: Is it possible to reset the DATE on 997.1 with PCM2.1? Reply with quote

The date on my PCM2.1 suddenly changed to 01/07/2000 a few weeks ago, and following a battery disconnect at the garage last weekend, then reset to 01/01/2000.

I understand the date previous reset automatically, but have seen recent info (including an email from TOMTOM regarding my old Gen1 Satnav) referring to some 'technology switch off' which sounds related, and suspect is the reason the date hasn't updated?

My question is, is there ANY way of changing the date MANUALLY on the PCM2.1 or is every PCM2.1 now going to show the wrong date from this year onwards?

Any help appreciated?

Thanks
T. Smile
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Porsche 997 Carrera S.
ex Mitsubishi GTO 3.0 Twin Turbo
ex Vauxhall Carlton 3000GSI 24V
ex Vauxhall Cavalier 2000GSI 16V
ex BMW 318i Cabriolet
ex Vauxhall Cavalier 1.8 LX
ex Ford Fiesta Mk1 XR2
ex Ford Fiesta Mk1 1100L
 
  
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deMort
Long Beach


Joined: 21 Mar 2015
Posts: 6744
Location: Brighton


PostPosted: Mon Apr 29, 2019 6:14 pm    Post subject: Reply with quote

Im working on this problem atm , the car is back with us tomorrow after being left outside for a number of days in the hope the gps would update it .

I did manage to use a tester to get the correct date last time but it was a bit of a mission .. the pcm will reset after you exit the programing with the tester and it keeps defaulting back to the wrong date.

I did it in the end but then had to do another battery removal and was back to square one .. hence its back tomorrow for me to try again.

Ill let you know tomorrow night i guess Smile

Not all units do this .. in fact very few so im guessing there is some software fault so an OPC reinstalling the software might work but i'm guessing here and it wont be cheap .. Indys don't tend to have the update discs .. there are an awful lot of them im afraid .
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Hertsdriver
Monza


Joined: 12 Nov 2018
Posts: 190
Location: Hertfordshire/London

2004 Porsche 997 Carrera 2

PostPosted: Mon Jun 10, 2019 9:00 am    Post subject: Reply with quote

deMort, did you ever get to the bottom of this one?

Thumb
 
  
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deMort
Long Beach


Joined: 21 Mar 2015
Posts: 6744
Location: Brighton


PostPosted: Mon Jun 10, 2019 3:55 pm    Post subject: Reply with quote

Yes and no and some of the bellow is my impression of whats going on !

We did a reinstall of the system software .. this basically deletes the date from the main screen .. i've already seen this on later software versions .. it seems only the first version actually has the date .

My way of thinking is something changed as this is GPS based and the "fix" was just to delete it from view... i see no other reason why the date would be deleted and there are many posts of this problem without a fix .

BTW if updating the software you have to do the nav update as well .

I had already established you cant set the date with a tester if the car can see any satellites but you can if under cover.

If the car is locked under cover then it will keep working with the correct date .. if locked outside though it resets back to year 2000 .

Anyways we did the software install and yup no date .

I tried something different though .. with a tester i reset the date to current and it appeared back on the main screen .. very weird , this seems to have stayed like this for now but the customer will let us know down the line if its still there and working i guess.


Over all this was very time consuming and a lot of trouble getting the correct discs .. the PCM as is often the case didn't even want to read the update discs at first so more messing around to get the first disc even started .

I hate software faults !!
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Hertsdriver
Monza


Joined: 12 Nov 2018
Posts: 190
Location: Hertfordshire/London

2004 Porsche 997 Carrera 2

PostPosted: Mon Jun 10, 2019 4:17 pm    Post subject: Reply with quote

Thanks for the update (forgive the pun.... Thumb )

It does seem to be linked to a change I gps technology and the old units inability to deal with this change. Annoying but not really the end of the world
 
  
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iainwarner6
Newbie


Joined: 04 Aug 2014
Posts: 17
Location: Hampshire


PostPosted: Mon Jun 10, 2019 4:43 pm    Post subject: Reply with quote

There was a GPS Rollover event on the 6th of April 2019. It's possible that this might be related.
Just speculation, may not be related but may be worth looking into...

https://www.theregister.co.uk/2019/02/12/current_gps_epoch_ends/

Cheers,
Iain
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jl-c
Silverstone


Joined: 22 Jul 2013
Posts: 148
Location: Shropshire


PostPosted: Mon Jun 10, 2019 5:32 pm    Post subject: Reply with quote

iainwarner6 wrote:
There was a GPS Rollover event on the 6th of April 2019. It's possible that this might be related.
Just speculation, may not be related but may be worth looking into...

https://www.theregister.co.uk/2019/02/12/current_gps_epoch_ends/

Cheers,
Iain


As I understand it, and yes mine is one that has lost the date, this seems to be the cause. As yet no reliable fix that I know of. As deMort says it can be reset but as soon as the satellites are connected, loses it again. I think it is just something we have to put up with it. In the grand scheme of things it is not really important.
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Porsche Carrera 2S 2005 black fully Hartech'd!, BMW Z4 coupé 2007 blue, Mazda Eunos 1996 yellow, VW Passat 2014 black.


We all do silly things/make mistakes, it's how we deal with them that sets us apart from animals and Americans.
 
  
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deMort
Long Beach


Joined: 21 Mar 2015
Posts: 6744
Location: Brighton


PostPosted: Mon Jun 10, 2019 5:58 pm    Post subject: Reply with quote

Hertsdriver wrote:
Thanks for the update (forgive the pun.... Thumb )

It does seem to be linked to a change I gps technology and the old units inability to deal with this change. Annoying but not really the end of the world


Floor

I did actually get it working prior to reinstalling / updating the software but there was no set of instructions i can give ..

Basically i set the date with a tester inside , a metal sheet over the gps antenna so it couldn't see the satellites ..

the customer never actually locks the car so i assume that over a couple of weeks it actually took the date as it could be locked inside and out after this and the date was always correct... a fix in a sense .

We had a separate issue with a nav software incompatibility message that we then did the install / update ..

I did the same thing again with the date and so far it seems to have worked but basically .. im of the opinion something has altered .. maybe the gps roll over thats stops this from working .

overall .. there is a fix but i can't give a clear set of instructions on how to fix this .. unless you can work it out from what i have done Smile
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Hertsdriver
Monza


Joined: 12 Nov 2018
Posts: 190
Location: Hertfordshire/London

2004 Porsche 997 Carrera 2

PostPosted: Mon Jun 10, 2019 8:39 pm    Post subject: Reply with quote

Floor Thumb
 
  
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Jam911
Albert Park


Joined: 31 Oct 2010
Posts: 1505



PostPosted: Wed Jun 12, 2019 7:08 pm    Post subject: Reply with quote

I have been looking at this post for a while.

I replaced my battery and since then the clock is not working as it should.

Start car. Correct time. Move off. time 2 - 3 hours early. Drive a bit more clock corrects itself.

I have posted about this before and we can't get to the bottom of it.

So today I wondered what the date was and I am 100% sure that it used to be displayed on the PCM but can i find it no !!

Is it related to this post and the GPS changes ....
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deMort
Long Beach


Joined: 21 Mar 2015
Posts: 6744
Location: Brighton


PostPosted: Wed Jun 12, 2019 7:29 pm    Post subject: Reply with quote

If you press the Main and Trip button at the same time you will get the software list , this will show any faults as there will be a triangle next to the item .

It will also say the version of software .

V1 .. date is displayed on the main screen .. in this case probably 7.7 2000 or 1.1.2000 .

This is the fault for this thread .

V2 and V 3.3 .. no date displayed on the main screen .. it can be found via settings and will be as per V1 .

I have to say i found a workaround by resetting the date with a tester as per previous post so that it was displayed correctly but cant say if it will last .


There is a work around for the time if you don't use the sat nav .. you disconnect the Gps antenna .. if it cant see the satellites then it cant reset anything .

Personally i'd rather have the correct time than use a nav system with 15 year old maps in it .


Time is adjusted via the button on the right of the instrument cluster but gps can interfere with this .

The roll over is a new thing to me but makes sense for both time and date .. but the date fault has been around for a while .
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