I recently purchased a
mk2 leon fr (59) plate, it has had a double din pumpkin head unit installed by the previous owner. I was just having a few problems with it and was wondering if anybody on here has had any similar problems with a head unit. When I first got the car the head unit was working perfectly fine for the first couple of months, now every so often it will just loose power sometimes it will just power itself back up staight the way or it could be a couple of days later up untill around a week. If I remove the head unit and move wires around to a certain point I can get the radio to come back on but again it could go off again within 10 minutes or a week. Does anybody think it could be a loose connection or could it be a rubbish/cheap wires or canbus device.
Thank you
I would test the pin outs from the car ISO connector to the headunit to ensure that the battery 12v and ground cable are working as expected. wiggle the wires if you can with the probes connected to make sure. Then plugin the headunit cable block to the headunit itself and check the voltage at the ACC plug from the CANBUS connector with the ignition on (ensuring that the spare ACC from the car ISO block is NOT plugged into the CANBUS/Headunit ACC wire if you have a CANBUS unit attached (at least for Joying units))
If your car is anything like mine, the CANBUS adapters from the Chinese units are not capable of switching off properly and will drain your battery over a number of days if left in standard issued condition. This has happened twice now, and my battery is currently in my hallway on charge. Interestingly, having just installed the sub this morning, when turning the volume up and down very quickly, the headunit repeatably switched itself off briefly then back on. It wasn't doing this before i connected the sub. This was with the ignition on, but the car not started. Then i tried to start the car and the damn battery is flat again so I suspect my issue is just not enough juice to run all my kit without the engine running (having had the CANBUS drain it for the last week). I have ordered a piggyback fuse tap adapter and will be cutting the ACC wire from the CANBUS unit and using the piggyback fuse 12vACC instead from somewhere in the fusebox.
Having just installed a Joying 4/64 octacore 9" screen (yes it is luuuuush compared to the rather crap and red MP3 standard unit!) using the SPDIF out to feed my processor (the reason for buying this particular Android unit) I have had a few issues which I thought I'd share.
First, the AMP control cable does nothing. 0V always. I contacted Joying who said 'Use our red ACC wire instead'. Why the ***k even include the amp control cable with massive fuse adapter that makes it hard to install in the stereo slot if it doesn't work?? The fuse holder has since been removed and the cable heatshrunk, just incase some evil firmware update wakes it up.
Second, the SPDIF output does not output the Keypad tones, regardless of whether the setting is on or off in the headunit settings. When I contacted Joying about this, they told me in Engerish:
>>>>
1) For the amplifier connecting, please connect our ACC wire with your amp wire.
2)The SPDIF only the sound processor, it is shown the sound effect for the music.
So no matter you connect the SPDIF or not, you also need to connect the speaker wire. then you can hear the toch screen sound.
Hope it will clear for you. if not, please inform.
Thanks
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Really? connect two sets of speaker outputs to my car wiring?? Four cables from my amplifiers having been fed from the SPDIF signal through a (not cheap) PXA-h701 processor, AND the four speaker cables from the headunit itself?? Are these people *****g insane?? The reason for using the SPDIF is to AVOID using RCA or, worse still, high level speaker output. Sodding Shenzen junk. I am wondering what other sound I might be missing through SPDIF which will be my next question to them.
Having said all of the above, the 9 inch screen, built in 4g sim slot and wifi, voice control over youtube, google assistant, native google maps, the ability to listen to DAB radio, Spotify, Flac files from usb harddrives, The Torque diagnostic app connected via OBD2, Android Auto/Apple carplay (if you want it), and remappable steering controls make this unit pretty awesome.
