Ring Loop MOST issue

EdmundIJones · Jan 8th, 2017, 13:23

I have decided it's time to sell my 2004 XC90 so took it to my local hand wash for a full valet, they did a first class job and it's never looked as new. BUT, while washing the carpets they have obviously caused some sort of problem as this morning the radio want turn on and the sat nav won't raise.

There is power getting to the radio as I got it to bring up the welcome message and then it went blank again. I can use VIDA to activate the buttons and see the state of the buttons when I press them so there is some sort of power/connectivity.

There is an ICM communicators error that comes up and reading the details it says there could be a ring loop / MOST issue. I'm not so good at this point of technical detail but it seems to me like maybe moisture or condensation has got into the fiber optic MOST cable which could be causing a communications error OR maybe one of the ring modules has been knocked.

Can anyone explain how to use VIDA to try and track down the route of the issue, it talks about pulling the ATM fuse for 30 minutes but I can't even find reference of which fuse it is.

Help!

Jan 8th, 2017, 13:23	#1
EdmundIJones Senior Member Last Online: Jan 8th, 2019 20:45 Join Date: Oct 2011 Location: Near Lymington	Ring Loop MOST issue I have decided it's time to sell my 2004 XC90 so took it to my local hand wash for a full valet, they did a first class job and it's never looked as new. BUT, while washing the carpets they have obviously caused some sort of problem as this morning the radio want turn on and the sat nav won't raise. There is power getting to the radio as I got it to bring up the welcome message and then it went blank again. I can use VIDA to activate the buttons and see the state of the buttons when I press them so there is some sort of power/connectivity. There is an ICM communicators error that comes up and reading the details it says there could be a ring loop / MOST issue. I'm not so good at this point of technical detail but it seems to me like maybe moisture or condensation has got into the fiber optic MOST cable which could be causing a communications error OR maybe one of the ring modules has been knocked. Can anyone explain how to use VIDA to try and track down the route of the issue, it talks about pulling the ATM fuse for 30 minutes but I can't even find reference of which fuse it is. Help!

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