Radio intermittent and then stopped working

[kevinlane07]

Long time lurker here, I have got some useful info here. Now I have a problem that maybe someone here may be able to help me with.

I have a 2017 Berlingo multispace, had it a bitt over a year now.  Recently the radio turned off, and would spontaneously turn back on after maybe 20 min, as I was driving. After a day or so of that behaviour it then completely turned off and has not responded since. I took a multuimeter to the back of it, and it is getting 12V.

Also yesterday, the tyre low pressure light flashed on briefly while I was driving. I noticed in the manual that the radio and the tyre pressure are on the same fuse. I also did the BSI reset by turning on side lights, holding down lock etc. That do not change things (except now I have the date/time fashing on the LCD)

Any suggestions for more troubleshooting would be greatly appreciated.
Kev

Edit to add it is the original Radio / CD player, nothing fancy

Edit to add: Are there any grounding points I should check for this?

[saskak]

I do not know the B9 at all, but the BSI reset never did anything for me. With these intermittent things, my first thing would be to check the condition of the battery/alternator. Put a multimeter on the terminals at idle and see if there is ~14.2-3V. Maybe it is nothing to do with the radio, etc., but worth a try.

[kevinlane07]

I do not know the B9 at all, but the BSI reset never did anything for me. With these intermittent things, my first thing would be to check the condition of the battery/alternator. Put a multimeter on the terminals at idle and see if there is ~14.2-3V. Maybe it is nothing to do with the radio, etc., but worth a try.

Thanks, the battery is only a few months old, but I'll check it. In case I got a dud or something.

[Sol]

I'd check the fuse blades for oxidation - it is possible for them to get a grey coating which needs cleaned off with emery paper. There are two 12v supplies to the radio, one switched with ignition and the other is permanent live. 

F8 on the BSI, mounted behind the glove box. The engine bay fuse box has no fuses for the interior equipment. Check and clean / reseat F8, F9 & F10 and see how you get on. F9 is the ignition supply via a BSI relay to the stereo. See below for the fuses and attached is the radio schematic. If you had issues with more than just the radio then I'd say pull and clean the shunt link (marked SH-HS) but make sure it goes on the right slot again. It powers several fuses on that set.

   


  Radio 1.pdf (Size: 341.07 KB / Downloads: 5)

[kevinlane07]

thanks for that, I did all the fuses but no luck. One thing I forgot to mention is that the interior of the car got fairly damp about 2 months ago. It dried up and there didn't seem to be any issues. So I am wondering if there is anywhere else that might be corroded as a result of that, which I should check? There was a bit of corrosion on the 10Amp fuse at the back of the radio.

[Sol]

Your BSI computer could have gotten damp. Check the plugs for corrosion. It's the mass of wires and plugs behind the glove box.

[Matt Haigh]

My previous B9 with the LCD screen version would reboot itself on a long journey which I always put down to overheating, very annoying. If I had kept it longer I'd have replaced it with an Android Auto head unit

[kevinlane07]

Thanks to everyone for replying. My update is that after several weekends spent trying a few things, nothing seemed to fix it. Several weeks later I noticed the light behind the volume knob was on. It work for a week, didn't for a few, but came back and has been going since. Great that it's working, but very annoying as I have no idea what happened.