Vehicle & Technical > Discovery

Multi Function UNnit

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Range Rover Blues:
Anyone know anything about the multi function unit fitted to 300 series Disco and soft dash RRC?

I think ours has packed up, the interior lights stayed on for a while and now don't come on at all, plus the rear wash-wipe doesn't wipe, just like a door is permentantly open..I've checked all the door switches and the aftermarket alarm so it looks like the MFU.

Can I change it without any problems? I've been told it's part of the imobiliser.

Ricky:
No its not part of the imobiliser. Heres a link on how to put it into diagnostic mode and check it out
http://forum.landrovernet.com/archive/index.php/t-37493.html
Sound like a short to earth to me

Range Rover Blues:
Hi Ricky, yes a short to earth was my first thought, but I've checked the door switches and the wring is not connected to earth at all, so the short myst be very close to or inside the MFU.  The lights still come on with the dash switch.

Range Rover Blues:
Ok, I've done the self-test and all the inputs checked out, but the rear wash-wipe didn't self-test.

I've replaced the MFU with a second hand one and tested it again.

I get a confirmatory beep from all 4 doors and the tailgate, I get beeps from all the switches inclluding those for the rear wash-wip. I get the interior light coming on as part of the self-test but no rear wash wipe.

So there's no aparent fault with any of the door switches or the dash switches.  the interior light still comes on with the dash switch but never wit the door switches.  if I disconnect the battery or the MFU for that matter the light comes on permantantly untill it times out.

So it still sounds like a door adjar, but how can it be? is there another door input I don't know about?

Jimbo:
Is there a bonnet switch ?

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