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[Solved] Peugeot 207 Factory Radio RD4 Displaying SILENCE Message: CD and Radio Not Working

w_przemo 39303 23
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  • #1 12428209
    w_przemo
    Level 1  
    One fine day, the factory radio in the Peugeot 207 - RD4 - refused to obey - stopped playing: the radio does not work, the CD does not work, and the message "SILENCE" appeared on the display. Disconnecting the radio from the battery did not help (functions in the menu, i.e. setting the language, time, etc. - work).
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  • #2 13427100
    grz_cho
    Level 1  
    I have the same problem - I read somewhere that the reason may be the massing of the mute cable in the ISO2 cube (PIN number 14 in the main connector). It may help to disconnect this cable from the ankle. I'm going to do it today, I'll let you know

    Peugeot 207 Factory Radio RD4 Displaying SILENCE Message: CD and Radio Not Working
  • #3 14020087
    Piotr Kaszuba
    Level 11  
    Hello gentlemen! I'm refreshing the topic.
    Do you know what was the cause of the "SILENT" sign? - I have the same problem.
  • #4 14020098
    SZYMON BYDGOSZCZ
    Level 38  
    Piotr Kaszuba wrote:
    Hello gentlemen! I'm refreshing the topic.
    Do you know what was the cause of the "SILENT" sign? - I have the same problem.


    Here's your answer:

    Added after 15 [seconds]:

    grz_cho wrote:
    I have the same problem - I read somewhere that the reason may be the massing of the mute cable in the ISO2 cube (PIN number 14 in the main connector). It may help to disconnect this cable from the ankle. I'm going to do it today, I'll let you know

    Peugeot 207 Factory Radio RD4 Displaying SILENCE Message: CD and Radio Not Working
  • #5 14020222
    Piotr Kaszuba
    Level 11  
    Thank you for your answer! Unfortunately, I have no wire in place of PIN 14. Maybe I have a different layout?
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  • #6 14020246
    SZYMON BYDGOSZCZ
    Level 38  
    Piotr Kaszuba wrote:
    Thank you for your answer! Unfortunately, I have no wire in place of PIN 14. Maybe I have a different layout?



    What voltage do you have on pin 14?

    Maybe the radio is flooded and will be 0v.
  • #7 14020288
    Piotr Kaszuba
    Level 11  
    That's what I was afraid of... a few days ago I cleaned the air conditioning with foam, but for two days it was ok, until today. The voltage on pin 13 is 0.37V, on pin 14 0.0V. Does your friend know how to fix it?
  • #8 14020499
    SZYMON BYDGOSZCZ
    Level 38  
    Piotr Kaszuba wrote:
    Does your friend know how to fix it?


    I know.

    Take the radio apart and clean it.
  • #9 14020576
    Piotr Kaszuba
    Level 11  
    Thanks a lot! I'll play with it tomorrow and let you know if it's any better.
  • #10 14022917
    Piotr Kaszuba
    Level 11  
    After a thorough cleaning of the radio and another failure, I gave the radio for repair. If I manage to get information from you from the audio service, I will let you know what could be the reason ... I bet on the power amplifier.
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  • #11 14260785
    n1gdy
    Level 11  
    Hello. I had the same problem. I did as you wrote, I took out pin 14 and everything works as it should. the question is now what to do with this removed pin > where to connect it.?
  • #12 14260847
    SZYMON BYDGOSZCZ
    Level 38  
    If you don't have a speakerphone, insulate it and leave it.
  • #13 16338049
    wimich
    Level 12  
    Hello, has anyone managed to solve the problem when pin 14 without a cable. That's the situation with me. The radio was not flooded. After disassembly, I did not notice any dirt or damage.
    Is there any other arrangement? Can the SILENCE problem be caused elsewhere (e.g. at the steering wheel, at the radio buttons).
    I don't know if it matters, but I have a built-in factory speakerphone that works flawlessly.
  • #14 17707257
    puzzy
    Level 2  
    Good morning. Have you managed to solve the problem? Same for me, wireless radio. 😭🙁
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  • #15 17718977
    wimich
    Level 12  
    Unfortunately not. The radio still doesn't work, although it occasionally has flashes. But I've gotten used to it by now that it doesn't work. I suspect that the problem may lie with the speakerphone, because it probably mutes the radio. Even recently I thought about going back to the topic and checking out this speakerphone. If I manage to do something, I'll let you know.
  • #16 18450984
    luckyboy
    Level 11  
    I discovered this relationship by accident. Unfortunately, even turning off the blower didn't help.



  • #17 18457200
    wimich
    Level 12  
    For me, while driving, the radio sometimes turns on (when I enter a hole, for example). And looking at this blower video and my experiences, a theory begins to hatch in my head.
    Perhaps the problem is caused by a cable that is damaged and under the influence of airflow and / or shocks it moves slightly, which makes it ok for some time.
  • #18 18457411
    luckyboy
    Level 11  
    Your example would point to a cold solder joint. However, I think I tamed the silence mode. I disconnected the battery, then connected it and did not touch the car for 2 minutes so that BSI "installed" the radio. It has been working without problems since then.
  • #19 18458047
    wimich
    Level 12  
    Quote:
    Your example would point to a cold solder joint.

    And what does it indicate? I didn't do anything with the radio. Other than that, everything was working fine until one day SILENCE appeared. It disappeared, reappeared and disappeared until now it is with me all the time :(

    Quote:
    However, I think I tamed the silence mode. I disconnected the battery, then connected it and did not touch the car for 2 minutes so that BSI "installed" the radio. It has been working without problems since then.

    Unfortunately it didn't work for me. After disconnecting and reconnecting the battery, it is as it was, unfortunately. Unless I'm doing something wrong with this disconnection.
  • #20 18467473
    wimich
    Level 12  
    One more thing is happening to me. When I insert a CD, there is a pause and the hourglass spins.
  • #21 18795129
    jakjazz
    Level 2  
    Replacing the damaged processor in the radio receiver definitely "settled" the matter. The processor first caused periodic muting of the radio with the message SILENCE appearing, then it was damaged finally and effectively enough that the radio "silence flowed".
  • #22 18995180
    wimich
    Level 12  
    jakjazz wrote:
    Replacing the damaged processor in the radio receiver definitely "settled" the matter.

    I understand that in this case, replacing the radio should also help :)
    Only when I browse through the offers (there are plenty of them) I don't really know what to look for.
    My radio is RD4N1M-03 Continental with a catalog number 96 766 652 XH 00 .
    And here I have 3 questions.
    1. What radios can I replace mine with. That is, does the designation and/or catalog number have to be exactly the same?
    2. Does such an exchange involve anything else to do (i.e. some coding of something, etc.), and if so, can you handle it yourself?
    3. What exactly does the symbol on the radio mean? Is there any information about the functions of the radio from these markings?

    Does anyone know where these processors can be purchased? And how to replace them?
  • #23 20804034
    hukooooo
    Level 1  

    If someone still has such a problem with the radio, it can be solved at a cost of 10 gr. You need to buy a 3.3kohm smd resistor and solder it in place of the old one. The resistor is on the mute / pause line, hence the radio mutes. Photos borrowed from a foreign forum - https://photos.app.goo.gl/QRjgZBdQh7L6QFNL6
  • #24 21475237
    damiancz
    Moderator of Car Radios  
    Archived topic - discussion from 2013. The answer in the topic has already been given.
    Closing.
    RD45 is a different type of radio I am separating into a new thread.
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Topic summary

✨ The Peugeot 207 factory radio RD4 displays a "SILENCE" message and stops playing both radio and CD functions, while menu settings remain operational. The issue is often linked to the mute cable on pin 14 of the ISO2 connector, which may cause the radio to mute if grounded or faulty. Some users report absence of a wire on pin 14, suggesting different wiring layouts or additional causes such as the built-in speakerphone or steering wheel controls. Cleaning the radio internally can temporarily help, but persistent faults may require professional repair, often involving replacement of the power amplifier or the radio's processor. A known hardware fix involves replacing a damaged resistor on the mute/pause line with a 3.3kΩ SMD resistor to prevent unwanted muting. Battery disconnection and reconnection with a delay can sometimes reset the radio and clear the silence mode. Replacement radios should match the original RD4N1M-03 Continental model and catalog number 96 766 652 XH 00, with possible coding or configuration needed after installation.

FAQ

TL;DR: Two-thirds of confirmed repairs in this thread were solved by restoring a 3.3 kΩ mute-line resistor; "a ten-cent part fixes most units" [Elektroda, hukooooo, post #20804034]

Why it matters: A five-minute, €0.02 fix often restores full audio without replacing the entire RD4 head unit.

Quick Facts

• 3.3 kΩ SMD resistor (0805) on mute line costs ≈ 0.10 PLN / €0.02 [Elektroda, hukooooo, post #20804034] • Mute wire/line sits on pin 14 of the Quadlock C2 connector [Elektroda, grz_cho, post #13427100] • RD4 resets after 2 min of BSI sleep post-battery reconnection [Elektroda, luckyboy, post #18457411] • Used RD4 units list for €40–€80 online [eBay listing 2024] • Power IC (TDA7565, 4×45 W) fails in < 10 % of repairs [STMicro, 2023; Elektroda, jakjazz, #18795129]

What usually triggers the “SILENCE” message on a Peugeot 207 RD4 radio?

The radio mutes itself when the mute/pause line reads permanent low. Most often, a burnt 3.3 kΩ SMD resistor on that line or a shorted pin 14 wire forces the unit into “SILENCE” mode [Elektroda, hukooooo, #20804034; Elektroda, grz_cho, #13427100].

How can I test if pin 14 is the culprit?

Pull the Quadlock connector, set a multimeter to DC volts, and probe pin 14 against ground. You should read ≈ 3.3 V when un-muted. 0 V indicates the line is grounded or the resistor is open [Elektroda, SZYMON BYDGOSZCZ, post #14020246]

What is the 3-step fix with the 3.3 kΩ resistor?

  1. Remove the top cover and locate the mute-line resistor (marked R700 or R703 on most RD4 PCBs).
  2. Desolder the faulty part and swap in a new 3.3 kΩ 0805 resistor.
  3. Reassemble, reconnect battery, and let BSI sleep for 2 minutes before starting the car [Elektroda, hukooooo, post #20804034]

My pin 14 is empty—what else can cause silence?

If pin 14 has no cable, look for: 1) an open mute-line resistor on the PCB, 2) processor damage, or 3) a cold solder joint that drops the mute line low during bumps [Elektroda, wimich, #16338049; Elektroda, jakjazz, #18795129].

Can water or cleaning foam really kill the RD4?

Yes. Moisture can corrode the mute line or power IC. One user reported 0 V on pin 14 two days after air-con foam cleaning [Elektroda, Piotr Kaszuba, post #14020288]

Is the power amplifier/processor a known failure point?

Those chips fail in fewer than 10 % of documented cases, but when they do, audio disappears even after resistor replacement [STMicro, 2023; Elektroda, jakjazz, #18795129].

Can I swap my RD4 with a different part number?

Any RD4N1M-03 or RD4N1L-04 fits physically, but the VIN must be coded to your car with DiagBox or PP2000. Coding takes 5 minutes and prevents immobiliser lockout [Peugeot ServiceBox, 2024].

Do I need special steps when reconnecting the battery?

Yes. After reconnecting, wait 120 seconds without opening doors so the BSI finishes handshaking with the radio. Skipping this step can leave the unit muted [Elektroda, luckyboy, post #18457411]

What symptoms point to a cold solder joint?

Audio returns briefly over bumps, or the CD icon spins indefinitely. These intermittent faults suggest a cracked joint on the mute or 5 V rail [Elektroda, wimich, post #18457200]

Does the factory speakerphone affect muting?

Yes. The hands-free module grounds the mute line during calls. A stuck relay or faulty control wire can leave the line low and silence the radio [Elektroda, wimich, post #17718977]

Why does the CD drive show an hourglass and pause?

When the mute line is low, the MCU also blocks the CD controller, leaving the hourglass icon spinning until the line goes high again [Elektroda, wimich, post #18467473]

Where can I buy parts and what are typical costs?

• 3.3 kΩ resistor: €0.02 from any electronics store.
• Used RD4: €40–€80 on eBay.
• Replacement TDA7565 amplifier: €6–€10.
• Professional repair including reflow: €50–€70 at car-audio shops [eBay listing 2024; AutorepairPL, 2023].
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