Porsche Club GB

996tt cd changer

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6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH996tt cd changer

Leading reported evidence

Check wiring plugs are all in place

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
I've taken the head unit out and checked the wiring plugs are all in place.
Original post Read captured discussion
996tt cd changer

Read full discussion summary

Leading evidence: 'Check wiring plugs are all in place' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check wiring plugs are all in place' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

Read captured replies

1 matching discussions · 6 captured posts examined · 0 partial discussions

Compare 3 other evidence results

Install cd3 cd changer

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
Hi, I've just fitted a cd3 cd changer to my 996 but the pcm2 head unit doesn't recognise it.
Original post Read captured discussion
996tt cd changer

Use cdc-3

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
It must be PCM1 if it uses a CDC-3.
Original post Read captured discussion
996tt cd changer

Use cdc-4 changer, not a cdc-3

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
PCM2 uses a CDC-4 changer, not a CDC-3.
Original post Read captured discussion
996tt cd changer

Frequently discussed actions (4)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check wiring plugs are all in place

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
I've taken the head unit out and checked the wiring plugs are all in place.
Original post Read captured discussion
996tt cd changer

Install cd3 cd changer

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
Hi, I've just fitted a cd3 cd changer to my 996 but the pcm2 head unit doesn't recognise it.
Original post Read captured discussion
996tt cd changer

Use cdc-3

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
It must be PCM1 if it uses a CDC-3.
Original post Read captured discussion
996tt cd changer

Use cdc-4 changer, not a cdc-3

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
PCM2 uses a CDC-4 changer, not a CDC-3.
Original post Read captured discussion
996tt cd changer

Coverage and how to read this overview

Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Porsche Club GB: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T150451Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi, I've just fitted a cd3 cd changer to my 996 but the pcm2 head unit doesn't recognise it. Is there any way of configuring the head unit to recognise the new component, or do I have to take it to the dealers to go on their computer? I'm sure this question has been asked before but I can't find it on the forum. Thanks for any help

POST 2Original post

PCM2 uses a CDC-4 changer, not a CDC-3. It has the fibre optic connections. Once fitted, the system needs to be coded to add the CDC function.

POST 3 / ORIGINAL POSTEROriginal post

mine definately has the cd3 system, i know because i bought a cd4 first and the connections were totally different. Will the cd3 still need coding aswell? Incidentally i still have the cd4 if anyone wants it.

POST 4Original post

Then I don't think you have PCM2. It must be PCM1 if it uses a CDC-3. Does your PCM have a cassette slot at the top? If so, definitely PCM1. If it is PCM1, then I don't think it will need coding. Were the cables for the CDC already in the front boot? If so, did you plug them in at the PCM unit?

POST 5 / ORIGINAL POSTEROriginal post

It has a cd slot above the screen and the instruction manual with the car says pcm2. I've taken the head unit out and checked the wiring plugs are all in place. I rang the opc this afternoon and they said it should have a cdc4 with optical connectors, but my connectors are totally different to the cdc4, so i'm totally perplexed

POST 6Original post

Yes, it is PCM2 then. On the CDC4 you should see a rectangular socket with two lenses at the base of the socket. They are the fibre optic connections, and you have to buy a fibre optic loop to connect them in the optical circuit. There should also be a power connection to the CDC4. If you drop me an email, I'll send you the fitting instructions, which explains what you need to do, and part numbers, etc.

This is a source reference. Confirm exact model applicability in the original material.