Fault code 33, 25, 54, and 9114

[C_Fooo]

Car is 2004 996 Turbo Cabriolet with Pioneer AVIC-Z110BT radio.

Durametric Diagnostic Tool for Porsche Version 5.1.4.0 (Thanks for JSBear to read the codes with his Durametric tool for me)

Alarm fault codes:

33 Interior sensor faulty

25 W lead

54 Radio receiver defective

Instrument Cluster 9114 PCM control unit fault

I am trying to fix the above problems. I read on the forum that there is suppose to have an alarm sensor that is blue/brown wire but I can’t find any blue/brown wire other than one go to the defogger. Am I supposed to have this blue/brown wire for a 2004? If not, what can cause the above faults?

Any suggestions on what the real problem can be or how to fix would be appreciated.

C_Fooo

[Sunnyside]

Car is 2004 996 Turbo Cabriolet with Pioneer AVIC-Z110BT radio.

Durametric Diagnostic Tool for Porsche Version 5.1.4.0 (Thanks for JSBear to read the codes with his Durametric tool for me)

Alarm fault codes:

33 Interior sensor faulty

25 W lead

54 Radio receiver defective

Instrument Cluster 9114 PCM control unit fault

I am trying to fix the above problems. I read on the forum that there is suppose to have an alarm sensor that is blue/brown wire but I cant find any blue/brown wire other than one go to the defogger. Am I supposed to have this blue/brown wire for a 2004? If not, what can cause the above faults?

Any suggestions on what the real problem can be or how to fix would be appreciated.

C_Fooo

Did you clear the faults using Durametric and try reading the faults again. Some times these type of faults are temporary. The modules only has to sense a glitch to log a fault. I keep getting the odd alarm fault like yours. Sometimes a micro switch will be a bit slow to operate . The mirror motor on my passenger side shows a fault even though it works ok.Once a fault has been logged it will not clear its self, you will have to do that. Untill you do, you wont know if you really have any faults ata ll to worry about.

So I wouldn't go spending too much time tracing the faults you have listed until you know for sure they are hard faults and not just glitches.

Frank

Edited April 11, 2011 by Sunnyside

[C_Fooo]

Yes, these codes are cleared and came right back.

[Loren]

Fault code 33 -- Passenger compartment monitoring sensor faulty (or disconnected)

Fault code 25 -- No terminal 86 S recognised

Possible cause of fault

- Fuse E1 faulty

- Terminal 86 S is not detected when terminal 15 is switched on

- Short circuit to ground/open circuit in the wiring between the alarm system control module and the ignition lock

- Ignition lock defective

Fault code 54 -- Tilt sensor not in normal position

Possible cause of fault

- Additional alarm system (alarm siren with tilt sensor) is not installed correctly

- Additional alarm system (tilt sensor) is faulty

[C_Fooo]

Hi Loren,

I thought code 54 is alarm sensing that the original radio is missing due to the aftermarket radio? My car is USA so will it have a tilt sensor?

I purchased the car 1 1/2 months ago and the Double din Pioneer was already there but not connected very well (i.e. even the antenna cable was not hooked up). The seller said he only uses his Ipod so he didn't even notice.

Some of the not connected wires are dangling and could possibly short to the aluminum plate at the bottom of the dash or the radio chassis. I will tape up all the loose wires/terminals to make sure they don’t short out.

Before I put everything back, I would like to make sure I have done everything that I could to make sure the faults are fixed. Having read about the potential of alarm sensing the original radio missing sounded like what my fault codes but I can’t find the brown/blue wire everyone else is talking about. Is this brown/blue wire only for pre 2004 model?

C_Fooo

[Loren]

Not on a 996TT.

The 996TT Service Manual says fault 54 is the tilt sensor.

Odd because US cars don't have them.

[C_Fooo]

Okay, thanks. Crazy that Durametric tool said the 54 fault is a defective radio. Maybe it is due to older version 5.1.4.0. Since it doesn’t have to do with the aftermarket radio, I will go ahead and put the radio back so at least, I can drive it :P .

C_Fooo

[Sunnyside]

Sorry for asking, but are you getting problems with the car or did you find the faults by accident after putting the Durametric on the car. For eg does the alarm keep going off,are you getting any external indication that the car has faults.

What made you put the Durametric on in the first place.

Sometimes these cars can make your life a misery trying to get them perfect. Its sometime better just to accept there not perfect.

Sorry for asking, I do mean well and I'm not having a go I assure you :)

Frank

Edited April 11, 2011 by Sunnyside

[C_Fooo]

Hi Frank,

I am not experiencing any issues after I had the radio antenna connected properly but I also haven't tried to turn everything on to check if everything is working or not. A friend offered to use his Durametric tool on my car and that is when I found all those faults. I thought at least the radio sensor fault will be easy to fix if all I needed was to make sure some wire (brown/blue wire that I can not find on my 2004 996TT) is not connected and maybe it will make some of the other faults go to away.

If the faults will not cause the car to deteriorate faster, I guess I can live with the faults.

C_Fooo

[Sunnyside]

Hi Frank,

I am not experiencing any issues after I had the radio antenna connected properly but I also haven't tried to turn everything on to check if everything is working or not. A friend offered to use his Durametric tool on my car and that is when I found all those faults. I thought at least the radio sensor fault will be easy to fix if all I needed was to make sure some wire (brown/blue wire that I can not find on my 2004 996TT) is not connected and maybe it will make some of the other faults go to away.

If the faults will not cause the car to deteriorate faster, I guess I can live with the faults.

C_Fooo

I sent my PCM away , as the card reader failed, i drove the car for 3 weeks without the PCM . My 996tt 1s October 2002. I dont remember this wire your talking about. Mind you at the time I didn't have a Durametric so I wouldn't have known there were any faults. In Fact for the 3 weeks, if I didn't look at the hole left by the PCM I wouldn't have known it was missing. :)

The attachment is a snippet from the wiring diagram. Hope it helps a little bit

Frank

Doc2.doc

Edited April 12, 2011 by Sunnyside

[C_Fooo]

Hi Frank,

From your wiring diagram, it has an Alarm Contact BN/BU (brown/blue) wire going to ground. I read on the forum that you are supposed to make sure this is no longer grounded by taping it up. I was thinking this is still grounded on my car; therefore, I am getting fault code 54 radio receiver defective and/or code 33 interior sensor faulty. This is the wire that I can not find on my 2004 996TT. JSBear’s showed me pictures of his 2002 996TT having a tab on the driver side of the plastic frame where the radio is. This is where the alarm wire spade connector connects to. However, I do not have it on my 2004 so wondering if it is some where else that I need to make sure it is not grounded.

C_Fooo

[Sunnyside]

Hi Frank,

From your wiring diagram, it has an Alarm Contact BN/BU (brown/blue) wire going to ground. I read on the forum that you are supposed to make sure this is no longer grounded by taping it up. I was thinking this is still grounded on my car; therefore, I am getting fault code 54 radio receiver defective and/or code 33 interior sensor faulty. This is the wire that I can not find on my 2004 996TT. JSBear’s showed me pictures of his 2002 996TT having a tab on the driver side of the plastic frame where the radio is. This is where the alarm wire spade connector connects to. However, I do not have it on my 2004 so wondering if it is some where else that I need to make sure it is not grounded.

C_Fooo

I have PCM, I wonder if that is different. My car is an October 2002 car so its a 2003 model. I definitely didn't do anything with wires when I removed the PCM for repair.??

Apart from that sorry I cant be any more help.

Frank