Richard Hamilton

Hmmmm. Both MY'04 Cayenne and MY'03 996T use PCM2.0 (albeit slightly different in size), and the CD drive is in the same place on both - in the position deepwater describes. The navigation CDs are the same for both, so you could copy your Cayenne CD. Just use a computer to copy the CD onto a good quality blank CD-R and burn it at the slowest speed you can.

I assume you have PCM. As you must have worked out, there are 3 external units - Amplifier, CD Changer, and Telephone. They are connected to the head unit by the MOST (fibre optic )loop. If any one of the units in the loop fails, all communication and sound signals are lost. Assuming the fibre optic cables are intact, and you have replaced the amp and bypassed the phone module, that only leaves the CD Changer - or the aftermarket iPod adapter. I would try bypassing it, and see what happens. Or if it is a Dension unit, try switching it to service mode.

I always find it easier to take the MAF sensor out the housing first, and then unclip the plug from the sensor, as you can see the clips much better.

No, you can't reset the service reminder, but you can read fault codes in most modules, and reset the fault memories. You can also read live data from the control modules. No, it isn't as good as the Durametric, but is a handy tool to have for the money. I have the BMW version, and have found it very useful on my kids Beemers.

I just noticed this while I was browsing the Connects2 site, and thought it might be useful: http://www.connects2.co.uk/ProductInformation.aspx?id=16685&p=CTDASPO01

Thanks for the reply, and sorry, I should have updated this thread. I took the wheel off and found that the signal wire from the switch to where it plugs in to the 'clockspring' is permanently grounded. The only way to get to the internal wiring seems to be to remove the PDK switches, and prise off the front cover of the wheel. PET shows an adhesive kit for this job, so I am reluctant to go any further. If I end up investigating further I will update the thread again, but for now I have put it on hold. I did fit a new switch first, and if it helps anyone in the future I can confirm that it comes out the back of the wheel. There are two plastic tags on the switch which clip into the back of the spoke. They are darned tight, and one broke when I removed it. I had already bought the switch, which was about £11.00 GBP, so not hugely expensive.

When you say it was pulled out by a wheel, do you mean a rope was attached to the wheel itself? If so, maybe it tore off a balance weight. Either way, I agree with JFP - you should get it checked.

2012 Cayman 2.9 PDK (RoW) I purchased a virtually new Multi-function Steering Wheel which came from a 997-2 that the owner had swapped for a paddle shift wheel. Fitting it was easy, and after coding the modules for multi-function, that part of it works perfectly. My problem is getting the steering wheel heating to work. I fitted the appropriate 'clockspring' contact unit (955.652.211.22) as the old contact unit didn't have connections for the heater wires. PET shows the steering column module for 2012 as being the type suitable for PDK (I250) and Steering Wheel Heating (I345), so I think I am OK there. When I code the steering column module to ‘with heated steering wheel’ I get fault codes in the module. The fault codes I get aren’t listed in the diagnostic manuals I have, but one is for the heater switch (8041), and the other for the heater itself (8034). I also get a fault in the PDK control module (U1810) showing a signal fault in the steering column module. I can't clear the faults unless I ‘un-code’ the steering column module, and then I can clear all the fault codes. Looking at Input Signals, it shows the button as permanently actuated, so it might be a bad button. I’ve tried getting the button out, but from what I can make out, you have to strip the whole wheel, which involves prising off and re-gluing the front of it back on. Not sure I fancy doing that right now, and I'm beginning to think about buying a pair of driving gloves. However, I know it will nag me. So my questions are: Has anyone successfully done it on a 2012 Cayman? Can anyone confirm how to get the heating button out the back of the steering wheel?

Pleased to hear it all worked out for you Ben.

Just sent you a PM with details of an amp if you need it.

MAIN and TRIP won't show you what you need. This is an extract from the document I would have sent you by email, which shows how to check the amplifier software version: Vehicle Type: 911 Carrera (996)/911 Carrera 4 (996) Model Year: Model Year: ‘03 (3) and ‘04 (4) Concern: BOSE amplifier – Sporadic sound failure in vehicles with PCM2 (I No. 665, 666, 668, 670) and BOSE sound package (I No. 680). - Modified software in BOSE amplifier MY ‘04 (as of the date of introduction). Information Sound failure occurs sporadically (no sound playback of PCM2 during radio or navigation operation) on vehicles from MY ‘03 and MY ‘04 with the equipment mentioned above, which were manufactured up to the introduction date mentioned below. In the event of a complaint, the software of the BOSE amplifier must be updated using the CD "BOSE Update-CD 2003-2; 911 & Boxster", part number, 000 043 205 50. After the update, the software matches the version in vehicles from MY ‘04 (as of the date of introduction) and thus BOSE amplifier, part number, 996 645 333 05. Software version: 1. The current version of the BOSE amplifier software can be displayed in the PCM2 display as follows: After switching the PCM2 on, press and hold the SET button (Figure 1, Item 19), then press the "FM-AM"- (Figure 1, Item 1) and the "AUDIO" button (Figure 1, Item 10) at the same time. The Service menu is shown in the display. Select the "SW versions" function by turning the right rotary knob (Figure 1, Item 17) and confirm by pressing the right rotary knob (Figure 1, Item 17). Depending on the software, the following version is shown in the display under "amplifier": "00011927" (or lower): The software matches the amplifier software version for vehicles from MY ‘03 or MY ‘04 up to the introduction date. => Perform an update as is described in Item 2. “00011929“: The software matches the amplifier software version for vehicles from MY ‘04 as of the introduction date. => An update is not necessary.

Good work Sherlock. Sounds like you have pretty much tracked it down to the amp. There is a software update CD for the Bose amp to correct sporadic sound failure, which might be worth trying. You haven't said if you have Bose, and what year your car is, by the way. If you have Bose (option 680) drop me a PM with your email address and I'll send you the instructions for checking the amplifier software version, and if you need the CD you can borrow mine. If all else fails, I have a friend who may be able to help with a used replacement amp.

Yes, I think you can rule out the CD Changer. I didn't realise it was an intermittent problem, but the PCM should still retain any fault codes, so a diagnostic check will give you a clue. Get them to go into the Coding sections of the PCM module, and look for "List of Required Components" and "List of Actual Components" (or words to that effect). This will show you what is coded (Required) and what is connected (Actual). This should tell you what isn't working, but of course it needs to be not working at the time of the test. That might be the problem with having an intermittent fault, but at least the fault codes will give you a pointer.

996-552-339-00-01C is only £3.64+VAT from a UK Porsche Centre. The plastic brackets for the aircon panel are only needed for the top position in the centre console. If you move it to the bottom position it fits the aperture without brackets.

I think you are best to start the other way round. If you get it plugged in to a PST2 or PIWIS tester, you can display a list of the equipment connected, and the order. It also can display a list of required (coded-in) equipment. If everything showing as fitted is also shown as connected, there will be fault codes stored which will tell you what's wrong. I have experienced a couple of PCM2.0's which have lost their coding for no apparent reason, and restoring the coding has fixed the problem. I have also heard of a couple of occasions where the fuse has blown inside the CD Changer. There is a small glass fuse on the circuit board inside it. You would know if it wasn't working if you couldn't eject the CD cartridge. Depends which side of town you are, but if you are in the west, I'm not a million miles away and would be happy to plug in my PIWIS for you.

OK on the threads and on the underside of the bolt head, but Porsche say do not use on the cone of the sleeve.

In answer to part of your original question, "Spec." is short for Specific. ie a specific mass flow rate (Kg/hr) calculated from a volumetric flow (cu.m/hr) at standard conditions.

As Johan says, I would start by changing the DME relay, as they are a common problem.

There are no fuses or relays for the front and rear turn indicator flashers. They are all connected directly to the Front Control Module. I think you'll have to disconnect wires from the plugs. Edit: Or remove the bulbs?

I think I would try the VW repair wire 000.979.009E or 000.979.010E. I used one of these to connect to the Tiptronic plug when I did the (non-eGas) cruise retrofit on my 1998 996, and I think it mightt use the same terminals on the DME. Didn't need an insertion tool. It just clicked in. Sorry I can't tell you which VW wire for sure, but it was about 9 yers ago. Edit: Looking at the connector assignment diagrams, I think I might be leading you on a wild goose chase, as the connectors look quite different. Sorry.

The KTS520 is not Porsche-specific. It just happens to be the interface which will work with clone PIWIS testers. The original PIWIS1 tester was based on the Bosch KTS650, which had an integrated interface card with the same properties. Vertronix sold the KTS520 branded in their own case. So I would expect Vertronics to be able to repair it. I recall that in Europe there is/was a scheme which offered an exchange circuit board at very reasonable cost. You might ask them if this service is available in the US.

Any offer like that is contrary to forum rules - I suggest you edit your post.

The KTS must be powered up when you first plug it in, as it does not take its supply from the USB port. It needs to be powered by a separate supply, or the OBD2 cable connected to the car. The green LED will flash when powered.. When connected, a message bubble should appear fron the taskbar saying "New Hardware found - KTS520". The KTS520 will show up in Windows Device Manager as simply a Human Interface Device without any other details. If this doesn't happen on your clone, then you could plug it in to ANY Windows XP computer/laptop and it should connect. If not, try a new USB cable (standard printer cable). If that doesn't work, then the KTS520 is faulty. Weak USB sockets are a known issue with these devices.

In the service book, you should find the Vehicle Identification Label. This shows (amongst other things) the codes of the optional extras.

That's very unusual. I don't think I've ever seen a PCM without navigation, phone, cd changer, and amplifier. If they aren't shown on the option sticker, and the hardware isn't there, than you don't have them. Usually when people don't want those features they normally specify the Radio/CD option, rather than PCM. All those options can be retrofitted, but would be prohibitively expensive, and a huge amount of work. If you wanted to use new original parts, I would expect it to be around £4000. (A dvd drive alone is £1700). Also, PCM2.1 is a 9 year old system, and doesn't have full postcode searches, or Bluetooth, etc. Your best bet would be to get an aftermarket system fitted. Because yours is so basic, you wouldn't have the complications of the MOST fibre optic network on a car which had all the options.