Radio dead

hello,
I have a Golf 4 from 2002 with a Nokia DSP-equipped MFD (Multi-Function Display) radio/navigation system and an FSE (Freisprecheinrichtung - hands-free system).
The radio won't turn on; it seems to have no power. Also, the lights don't work when I try to switch them on.
I cannot access the control units for the radio and navigation system using VCDS (VAG-COM).
only on the DSP control unit.
I checked fuses 5, 10, and 42.
I'm at a loss now.

Does anyone have a suggestion on where or how else I could search?

Best regards.
tikatoni

Hello!
Mir fehlt zwar als direkter Bezug zu deinem Problem ein Schaltplan, aber wenn du sagst, daß die Beleuchtung auch nicht geht, dann könnte ich mir glatt ein Masseproblem vorstellen. AFAIK müsste auch bei deinem NaviNokiaIrgendwas ein ganz normaler ISO-Stecker zur grundsätzlichen Versorgung vorhanden sein. Prüfe an dem mal ob Masse ansteht. Ebenso kannst da mal prüfen, ob die Versorgung von Zündung, Dauerplus und Licht überhaupt bis zum Radio kommen. Wenn Since you've ruled out everything else, the problem is probably with the radio itself.

Best regards,
Dominique.

hello,
Thank you for the response.
I'll try to do that tomorrow.
Does anyone have any ideas on how I can find out the pinout of a connector?
Why can't I access the control units?
Are they members of the MFD?

Hello!
The pin configuration of an ISO connector is usually the same; the user manual for a Blaupunkt or Google device might help you with that. As far as I recall, the control unit is located in the radio itself. So, if the radio is dead, there's no communication with the control unit.

Best regards,
Dominique.

D. Kurz wrote:

Hello! The pin configuration of an ISO connector is usually the same; the user manual for a Blaupunkt or Google device might help you with that. As far as I recall, the control unit is located in the radio itself. So, if the radio is dead, there's no communication with the control unit. Best regards, Dominique

.

Okay.
I had suspected that.
Since neither the radio nor the lights are working, it's likely that there's a problem with the ground connection.
I think so.

The pin configuration for an ISO connector is generally always the same.
Leider nicht bei VAG, da sind Pin 4 und 7 Vertauscht.

http://img113.

/img113/3530/imgp12611uk.jpg
1. GALA
2. TEL-MUTE
3. K-BUS
4. S-CONT (Ignition) (12V+ when ignition is on).
5. SAFE (12V+)
6. Lighting (less than or equal to 12V, depending on the dimmer setting).
7. Constant positive voltage (12V+).
8. Mass.

(The image shows the connector I modified for use with a third-party radio; the numbers should correspond to the legend.)

Thank you for the pinout information.

I'm just thinking – if it turns out that the mass is actually missing:
Where was it published?
Does the Volkswagen Golf 4 have a central mass point?
where the plug might have come loose.

tikatoni wrote:

I checked the fuses 5, 10, and 42. now I am at a loss

.

Check fuse 37 (10A). There might be a flat blade fuse located on the back of the MFD. I would check that before you start disassembling everything to look for ground faults.

Did you check the fuses for continuity, or just look at them?

Roger wrote:

tikatoni wrote: I have checked the fuses 5, 10, and 42. now I am at a loss . Check fuse 37 (10A). There might be a flat blade fuse located on the back of the MFD. I would check that before you start disassembling everything to look for ground faults. Hast Du die Sicherungen auf Durchgang geprüft, oder nur angesehen ?

Okay, I'll do number 37 first thing tomorrow - thanks!
I just looked at it - I'll do it properly tomorrow.
I'm also checking the MFD.
thank you!

Center of gravity point: check behind the fuse box on the A-pillar.
Okay, just between us: I would first check all the fuses and then the cables, because the fault must be located in the power supply. Assuming the MFD is still functional, which I believe it is. I wouldn't consider replacing the entire cable, because the problem with the old one likely lies only in the connector or a short section of cable near the fuse box.

matthiasTDI96 wrote:

Central mass point: check behind the fuse box on the A-pillar. Between us: I would first check all the fuses and then the cables, because the error can only be found in the power supply. If the MFD is still functional, which I assume it is. A new cable would not be an option for me, because the problem with the old one could only be related to the connector or a meter of cable leading to the fuse box.

That's what I thought too.
I'm curious to see what the cause is.

I found the error.
The device's fuse had been blown.
I already had them in my hands yesterday.
It looked like she was okay .

thank you for the help

the numerous error codes that are now appearing in some tax software.
likely caused by a tripped circuit breaker.
I deleted them all at one point.

Quote:

I found the error. The device's fuse had been blown. I already had them in my hands yesterday. It looked like she was okay

.

Great . Measurements rule .

Roger wrote:

Quote: I found the error. The device's fuse had been blown. I already had them in my hands yesterday. It looked like she was okay . Awesome . Measurements rule .

Sure .

but doesn't "messen" also come from "mist"?
exactly like:
real men don't read instruction manuals .

The main thing is that you learn from it.