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Help with dead logic 7 radio sat nav please

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Barnet

Member Since: 03 Sep 2018
Location: Beds
Posts: 3

Help with dead logic 7 radio sat nav please

Hi guys hope someone can help me here I've searched everywhere for answers and just not getting anywhere with my lr3 o5 hse and wondered if anyone had any idea on what’s going on !?! so last week my radio and sat nav just stopped working. you could see a slight green light flashing from inside the radio unit since then I have done a hard reset and nothing much changed other than the light has stopped flashing. Ive since then done some investigating and it seems that fuses f37 and f38 in the fuse box don’t seem to have any power what ever I do. I have read about infotainment r242 causes f38 to power up but yet to find any info on where said relay is and how to check it out, if its R5 in the fuse box then im not sure it is at fault as I’ve exchanged it with the cigarette relay above it as they show same part numbers with no luck. any help or information would be greatly appreciated.

13th Jan 2020 7:57 pm

Pete K

Member Since: 15 Jan 2016
Location: GL
Posts: 10684

2005 Discovery 3 TDV6 HSE Auto Rimini Red

The head unit commands that relay to power up

So if no activity there it’s prob head unit related

13th Jan 2020 9:33 pm

Barnet

Member Since: 03 Sep 2018
Location: Beds
Posts: 3

Thanks for your reply Pete, so would I be correct in saying that the command to open relay r249 would be sent through the canbus then ? Have looked at wiring diagrams and don’t see a signal wire to activate it.

14th Jan 2020 8:02 am

Pete K

Member Since: 15 Jan 2016
Location: GL
Posts: 10684

the thin blue wire out of the headunit activates it I believe

Don't know if high or low activates it

14th Jan 2020 12:07 pm

Martin
Site Admin and Owner

Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18563

2006 Discovery 3 TDV6 SE Manual Buckingham Blue

Not sure where you've found R242/Fuse 38 etc - see PDF below for the 2005 wiring diagram.

https://www.disco3.co.uk/gallery/albums/us...System.pdf 06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know!

14th Jan 2020 12:36 pm

Pete K

Member Since: 15 Jan 2016
Location: GL
Posts: 10684

on the 3rd page.....

Sorry, it's a Red/blue wire (going low/gnd) that activates the relay, and then powers up the blue wires

fuse 53, 58

14th Jan 2020 12:50 pm

Martin
Site Admin and Owner

Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18563

Yeah I know, it's not R242 or Fuse 38 though

06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know!

14th Jan 2020 12:54 pm

Barnet

Member Since: 03 Sep 2018
Location: Beds
Posts: 3

Thanks again I’ve ordered a replacement head unit now so fingers crossed. That r242 was a typo meant r249 and it’s fuse 57 and 58 that are lacking power on mine not 37 and 38 (was a long day yesterday) Will confirm if radio works when replaced hopefully might be of help to anyone with the same issue

14th Jan 2020 2:53 pm

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