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YOUR RESEARCHCDR-220 Issues - On w/ No Sound - '02 996 C4S w/Bose
Leading reported evidence
Check rear plugs
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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
Update: I cleaned the faceplate, removed the CDR unit, checked the rear plugs, replaced the 10amp fuse, reentered the Becker code and got the unit on.
CDR-220 Issues - On w/ No Sound - '02 996 C4S w/Bose
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Leading evidence: 'Check rear plugs' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check rear plugs' (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.
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
Update: I cleaned the faceplate, removed the CDR unit, checked the rear plugs, replaced the 10amp fuse, reentered the Becker code and got the unit on.
CDR-220 Issues - On w/ No Sound - '02 996 C4S w/Bose
Install but was subsequently removed
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 do also know that at one point it had an aftermarket Continental single DIN radio installed but was subsequently removed to replace back with the OEM for the factory aesthetic.
CDR-220 Issues - On w/ No Sound - '02 996 C4S w/Bose
Replace amp
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
To close the loop here, I replaced the amp and to my utter shock, it worked!
CDR-220 Issues - On w/ No Sound - '02 996 C4S w/Bose
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.
Replace bunch of them
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.
CDR-220 Issues - On w/ No Sound - '02 996 C4S w/Bose
Install but was subsequently removed
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 do also know that at one point it had an aftermarket Continental single DIN radio installed but was subsequently removed to replace back with the OEM for the factory aesthetic.
CDR-220 Issues - On w/ No Sound - '02 996 C4S w/Bose
Replace back
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 · Original poster
I do also know that at one point it had an aftermarket Continental single DIN radio installed but was subsequently removed to replace back with the OEM for the factory aesthetic.
CDR-220 Issues - On w/ No Sound - '02 996 C4S w/Bose
Replace sources, volume, settings menu, etc.)
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 · Original poster
The unit turns on and functions seemingly as it should (changes sources, volume, settings menu, etc.), but it does not produce any legible sound other than a small static ticking.
CDR-220 Issues - On w/ No Sound - '02 996 C4S w/Bose
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.
12 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 1 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T122219Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi All,
I recently purchased a '02 C4S w/BOSE and w/o MOST. The car is in great shape but the OEM CDR-220 radio system isn't operational. The unit turns on and functions seemingly as it should (changes sources, volume, settings menu, etc.), but it does not produce any legible sound other than a small static ticking. Its prior owner advised that the radio was working previously and that after a period of time on the battery tender it stopped working. I do also know that at one point it had an aftermarket Continental single DIN radio installed but was subsequently removed to replace back with the OEM for the factory aesthetic. I tried replacing fuses D8 & D9 with new ones, to no avail.
Any next steps suggested before I give up and bring it to the local audio shop? I believe Becker is nearby me in NJ...
Note, I want to upgrade to the PCCM soon but don't want to make any moves until the original system is operational to minimize future confusion.
Thanks for the help!
-AW
Thanks for the responses.
Update: I cleaned the faceplate, removed the CDR unit, checked the rear plugs, replaced the 10amp fuse, reentered the Becker code and got the unit on. I did the same with the amp up in the frunk. Same exact issues persisted. Any other DIY suggestions?? How would I test the radio wiring further?
Should I look into replacing the Amplifier?
Much appreciated on the help.
The amplifiers in these cars tend to go bad because they're mounted in the frunk and exposed to the elements. I've replaced a bunch of them. Unfortunately, the BOSE amps are more expensive but you can find them on eBay with a little patience. My bet it's the amplifier. There is a way of testing these units by process of elimination, but you need testing equipment and harness adapters. I assume everything is factory and hasn't been altered?
The easiest way is find a second amp and swap it out. The same goes for the CDR-220. Personally, I've never had one of the CDR-220 units go bad, but again, I've replaced a lot of the HAES, Nokia, and BOSE amps.
If all else fails, you may need to do a "vehicle hand-over using PIWIS" ..
When the cars are new they are shipped in "transport mode" that limits the battery draw by keeping many creature comforts from working while being shipped..When the cars are being prepped for sale, the "Hand-over" is preformed with the PIWIS to restore all the creature comforts functions...
There are some weird cases where the battery voltage or some strange electrical circumstance/issue can cause car the car to go back into "transport mode"....I have fixed many a radio or A/C or interior lighting issue by doing a Hand-over...It's been a long time and I don't remember if the CDR-220 on the 2002 is susceptible of this or not,, but something to keep in mind as a "last ditch effort"...
Thanks guys. Just (reluctantly) ordered a new amp. Fingers crossed!
@Porschetech3
- If the new amp doesn't cover it, is that something a local euro shop can do or is that Porsche direct only?
The PIWIS Tester has a vast array of Functions that all the other Testers do not have.( but they can do 90% of the common things needed).Anyone who has the PIWIS and "KNOWS how to use" its functions can do this..
To close the loop here, I replaced the amp and to my utter shock, it worked! Thanks for all the great feedback.
Now on to phase 2... PCCM installation!
Much appreciated everyone.
@ZuffenZeus
@Porschetech3
Your expertise is needed once again on the PCCM install! Nothing is ever easy... thread link below.
https://rennlist.com/forums/996-foru...-sound-14.html
I have the same issue 2002 Porsche 996 Turbo with de CDR 220 and with the Bose sound bar on the back. All the other speakers have no Sound Brand on the cover.
I haven't had time to go and fetch the amp and see which one I have. Maybe you can tell me which one you had. Im suspecting a Becker
996-645-331-01 can you confirm?
This is a source reference. Confirm exact model applicability in the original material.
