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I've just done the system check on my sat nav because the TMC is always red. Maybe because my 2003 disk doesn't have TMC marked on it?
Anyway, I was in the user settings and function tests, and bus check. When it finished the IIC was listed as failed
Does anyone know what IIC stands for and is it expensive?
I'm guessing you didn't have your radio switched on when you did the test? The IIC (or I2C - I 'squared' C) is a component interconnect bus developed by Philips. In this case it is the way that the Sat Nav communicates with the Radio for things like the display of the radio channel, volume, etc.
Try the test again with the radio switched on.
By the way, if you suspect problems with your TMC there is a diagnostics screen that shows signal level and quality.
A RED indicator show that you have a TMC disk but that there is no signal (from Classic FM)
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