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maeowenti
Newbie


Joined: 13 Apr 2018
Posts: 9
Location: Cheshire


PostPosted: Fri Apr 13, 2018 9:41 am    Post subject: Help please. Dashboard LCD's not switching off Reply with quote

I am hoping there is someone out there who can point me in the right direction with my dash LCD problem (digital speedometer, clock and odometer) The problem is they stay illuminated when the vehicle is locked and armed, thus slowly draining the battery. If the ignition key is removed, the LCD's shut off in just under 4 minutes (like they're supposed to), but as soon as I lock the car the LCD's momentarily shut down, and then come back on again either immediately or after 5 - 15 minutes. There are many threads covering similar dashboard issues, but nothing relating to my problem.

I've had some diagnostics run on the car and two error codes were found (but no indication of when they occurred. My car is a 2004 model and I've owned it trouble free for 10 years, so I'm thinking the codes are old) Error codes 54 and 59. Searches on these codes indicate central locking issues, and the threads referred to earlier point towards door locks, ignition and light switches, but all of these modules are working fine, i.e. windows drop on opening, interior lights come on etc. Everything is working fine except these darned LCD's when the central locking is armed.

Please has anybody experienced this fault, and what was the remedy?
 
  
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PHS
Trainee


Joined: 03 Mar 2018
Posts: 64
Location: Essex


PostPosted: Fri Apr 13, 2018 10:54 am    Post subject: Reply with quote

I've not experienced it myself, so don't have an answer for you....but it sounds like the car thinks the door is open, or similar.

You say the modules are fine, how have you tested these?
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2004 996 C4S Manual
Slate Grey

Std Options: PCM2, Heated memory seats, Litronics, Parking sensors, body colour centre console

Added: Rennsport semi-solid engine mounts, 997 shifter, Full TopGear s/s exhaust system
 
  
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maeowenti
Newbie


Joined: 13 Apr 2018
Posts: 9
Location: Cheshire


PostPosted: Fri Apr 13, 2018 11:52 am    Post subject: Reply with quote

Hi PHS, thanks for the reply to my post. I agree with you, something in the car probably thinks the drivers door is open. From memory, opening the passenger door does not illuminate the dash LCD's

The micro-switches in the door locking modules appear to be functioning correctly; unlock doors with remote, interior lights illuminate, so door unlocked switch OK. Lift exterior door handle, and window drops, and stays dropped, so handle and door open switches OK (if the door open switch is bad the window goes back up when you release the door handle) Closing the door raises the window to closed position, so door closed circuit is good (I think it's the same switch as door open) and central locking arms normally with no beeps, so the alarm module believes the door is closed and locked.

nxi20 on PistonHeads is suggesting a faulty ignition switch, and this has been suggested by quite a few contributors on forums worldwide as well. It's not an expensive fix, so I might give it a try
 
  
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Robertb
Long Beach


Joined: 01 Sep 2003
Posts: 6714
Location: South Oxfordshire

2002 Porsche 996 Carrera 4S

PostPosted: Fri Apr 13, 2018 12:11 pm    Post subject: Reply with quote

Do the interior lights come on too, when it all comes back on? If not, that would rule out to my mind anything to do with unlocking or opening the door and would as you say point to the ignition switch, given that its a known 996 weak point.
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maeowenti
Newbie


Joined: 13 Apr 2018
Posts: 9
Location: Cheshire


PostPosted: Fri Apr 13, 2018 12:42 pm    Post subject: Reply with quote

Hi Robert, thanks for your reply - no, only the LCD's are energized
 
  
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deMort
Zolder


Joined: 21 Mar 2015
Posts: 5508
Location: Brighton


PostPosted: Fri Apr 13, 2018 7:10 pm    Post subject: Reply with quote

Ive only seen it once .. a car had been reverse jump started .. among several other defective items the dash wouldn,t go to sleep ..

In that instance it was a faulty instrument cluster but at £2500 it was a hell of an expensive fault , i had a few sleepless nights after diagnoseing that i can tell you ... something called the gateway was stopping the car from going into sleep mode ... 996 and its inbuilt to the cluster .. 997 and its an external unit .

Ignition lock is the first one to rule out .. so unplug it and lock the car .. youll soon know if its that or not .

Check under the pasenger seat .. have a look as well .. no water there or drink bottles that might be leaking on the alarm control unit ?


If none of that i think a garage is in order , get a 1 hour diag done .. basically they spend an hour and see what they can find .. after that any further investigation has to be authorised by you .
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maeowenti
Newbie


Joined: 13 Apr 2018
Posts: 9
Location: Cheshire


PostPosted: Sat Apr 14, 2018 8:38 am    Post subject: Reply with quote

Thank you deMort - I've seen many of your posts, you seem to be the Wikipedia of Porsche!.

Mercifully it's not raining so I'll get the car outside, disconnect the ignition switch, and see what happens.

I'm wondering if I upset the system when I disconnected the battery a couple of months ago to repair the alternator. If if it's not the ignition switch, I'll also disconnect the battery and reconnect again using the correct procedure
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2004 996C4S Seal Grey/Black hide
Griffith 500 Black/Magnolia hide
Triumph Stag Blue/Black
 
  
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mun802
Silverstone


Joined: 05 Apr 2008
Posts: 130
Location: Lancs


PostPosted: Sat Apr 14, 2018 10:02 am    Post subject: Reply with quote

Similar issue with mine last year and it was a faulty ignition switch
 
  
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maeowenti
Newbie


Joined: 13 Apr 2018
Posts: 9
Location: Cheshire


PostPosted: Sat Apr 14, 2018 12:13 pm    Post subject: Reply with quote

Dear All. Disconnecting the ignition switch didn't resolve the issue, neither did disconnecting the battery. I'll replace the ignition switch, as it's only £25, as there are just so many forum contributors in the Porsche community who have found that replacing the switch resolved their problems. I'll report back either way
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2004 996C4S Seal Grey/Black hide
Griffith 500 Black/Magnolia hide
Triumph Stag Blue/Black
 
  
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maldren
Österreich


Joined: 07 Oct 2016
Posts: 937



PostPosted: Sun Apr 15, 2018 5:43 pm    Post subject: Reply with quote

I had a problem with lots of warning lights on mine, 9E took the instrument panel out, reset the computer and replaced it. All has been well since.

They mentioned that a new panel is £2.5k but there is a firm in Yorkshire repairing and guaranteeing them for £150 if you need one.
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Mike
2003 996.2 C2 Coupe Arctic Silver
 
  
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maeowenti
Newbie


Joined: 13 Apr 2018
Posts: 9
Location: Cheshire


PostPosted: Wed Apr 18, 2018 3:37 pm    Post subject: Reply with quote

Hi Maldren, do you happen to know the name of the company. I've searched the internet, but cannot find anyone doing Porsche instrument repairs in Yorkshire
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2004 996C4S Seal Grey/Black hide
Griffith 500 Black/Magnolia hide
Triumph Stag Blue/Black
 
  
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maldren
Österreich


Joined: 07 Oct 2016
Posts: 937



PostPosted: Wed Apr 18, 2018 3:51 pm    Post subject: Reply with quote

Sorry I don't but Ken at 9E does and he'll probably help.
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Mike
2003 996.2 C2 Coupe Arctic Silver
 
  
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HSC911
Zolder


Joined: 23 Jul 2014
Posts: 5697
Location: Bedford


PostPosted: Wed Apr 18, 2018 4:15 pm    Post subject: Reply with quote

These lot were on Wheeler Dealer's:

http://www.clusterrepairsuk.co.uk/about

Thumb
 
  
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maeowenti
Newbie


Joined: 13 Apr 2018
Posts: 9
Location: Cheshire


PostPosted: Thu Apr 19, 2018 8:04 pm    Post subject: Reply with quote

Hi, thanks to everyone who has responded to my post. OK, update,,, Ignition switch change did not solve the problem. The only circuit with a fault associated with the dash LCD's (OBC) is the OBC switch on the steering column which has has no function in the upward vertical plane. As actuating this switch (along with many others) energizes the dash LCD's, could a no signal (normally open/normally closed, I've no idea!!) cause the dash LCD's to remain on when the car is locked? Right now I am pulling fuse B1 to isolate the instrument cluster every night. Please let me know
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2004 996C4S Seal Grey/Black hide
Griffith 500 Black/Magnolia hide
Triumph Stag Blue/Black
 
  
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wasz
Magny-Cours


Joined: 28 Dec 2012
Posts: 2635


1999 Porsche 996 Carrera 2

PostPosted: Thu Apr 19, 2018 9:12 pm    Post subject: Reply with quote

I don't know but I believe you can unbolt and unplug the OBC stalk from the rest of the stalks. Just take the steering wheel off (disconnect battery for a while first so the airbag doesn't go off, and don't connect it back until the airbag is reconnected).

Worth a go?
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maeowenti
Newbie


Joined: 13 Apr 2018
Posts: 9
Location: Cheshire


PostPosted: Sun May 13, 2018 4:16 pm    Post subject: Reply with quote

Update; problem appears to have been solved. I decided to check out the micro-switch on the luggage compartment catch/lock, as the compartment light had stopped illuminating when the hood was open. The amount of crud in there was unbelievable. Anyway, cleaned it all up, reassembled, and the light now works again, and hey-presto, my dash LCD's switch off when the car is locked and armed. I have no explanation for this, and I'm keeping my fingers crossed that this was the cause all along. Time will tell.

Next project is to take the cylinder heads off my Stag to cure an annoying coolant leak, and convert the engine to EFI
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2004 996C4S Seal Grey/Black hide
Griffith 500 Black/Magnolia hide
Triumph Stag Blue/Black
 
  
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grbspeedster
Montreal


Joined: 11 Nov 2007
Posts: 540
Location: Rugby


PostPosted: Sun May 13, 2018 4:34 pm    Post subject: Reply with quote

Hope it's solved for you, well done in tracking down Thumb
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Geoff
996 X50 turbo cab
 
  
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JKH112
Spa-Francorchamps


Joined: 28 Jan 2011
Posts: 357
Location: Bristol

2001 Porsche 996 Carrera 2

PostPosted: Sun May 13, 2018 5:26 pm    Post subject: Reply with quote

A stag and a 996, both great cars and both have a certain reputation for engine reliability. You do like living on the edge!
 
  
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maeowenti
Newbie


Joined: 13 Apr 2018
Posts: 9
Location: Cheshire


PostPosted: Sun May 13, 2018 7:55 pm    Post subject: Reply with quote

Thanks for your responses. All internal combustion engines work the same - suck, press, bang, blow. Sure the 996 and Stag engines have know issues, but "forewarned is to be forearmed" and if you cannot deal with these known issues, buy a Nissan Leaf

For those of us who do not have the privilege of owning a car fitted with the glorious X50 lump, fit a magnetic sump plug, and dissect the oil filter every oil change, and examine under a magnifying glass. You'll soon see if anything is amiss with your engine before anything catastrophic happens.

For peace of mind I change my oil filter every 2000 miles, and in 20,000 miles of ownership, I've only once found anything more than a micron of silver foil in it. Sure, when the time comes to replace the clutch, I'll do the IMS bearing, but until then, I'm reveling in the ownership of my Porker
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2004 996C4S Seal Grey/Black hide
Griffith 500 Black/Magnolia hide
Triumph Stag Blue/Black
 
  
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