Quote:
Originally Posted by BigRuss
... if ECM loses the Can-bus signal then the IPK multiplexer IC effectively blocks the ambient air temperature signal from being transmitted on the K-bus.
|
Ah, thank you Russ, that's the sort of clear explanation I was looking for.
If we just think about that for a moment. Given that the IPK receives the analogue exterior temperature signal directly from the sensor then converts it into a K-bus message, and there is a clear route on a K-bus wire from IPK to BCU, then it is surely very bad design to disable this route simply because there's a blockage on another network (the CAN bus).
To continue the bus analogy, it's like saying that the road is blocked between London and Nottingham so therefore no buses will leave London for Cardiff! That's insane.
Quote:
|
... so T4 doesn't have this option in it's software.
|
Thanks for confirming.
Simon