My question is - in a basic E61 (just business satnav and no fancy hifi options) - what module sends light to the M-ASK and what module is next to receive light from it (I don't have a CD changer). ![]() When I take the MOST fibre connectors out of the M-ASK, I can see the M-ASK is generating light, but there is no light coming from the disconnected cable - which indicates the ring is broken. However,after checking glovebox fuse 34 was ok so today I took the M-ASK out (the car is Jan 2007 build so has the M-ASK 2) and can hear the drive spinning up and trying to read the installed DVD. I've done some googling as it's often the case that the M-ASK unit has failed (this then doesnt initialise the idrive CID). The foxwell live data and tests indicate the M-ASK is working ok (my DIS laptop has a flat battery so can't do any moredetailed tests!). Presumably it should state switched on but is dependant on th e M-ASK getting what it needs from the MOST bus? Using the foxwell on the CID module and getting live data, voltages and light levels are good, LVDS is OK but 'monitor status to bus = switched off'. Using my foxwell NT520 diagnostics tool for the CID (central display) it gave code A46D declaring it as 'malfunction due to peripheral' or 'malfunction of CID by reset of MOST ring'. A week ago my idrive display stopped, the radio doesn't work and the old business SATNAV DVD won't eject.
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