Post
by FioranoCars » Mon Jul 03, 2017 4:05 pm
Hi
Two different issues here
1. The live at the EOBD is permanent live, so never goes to sleep
2. As Mark said, depending on model/year etc the different BUS will go to sleep, in anything from a few seconds to maybe 40minutes, say 60minutes as an outside. This is perfectly normal.
If you device is drawing excessive current from the Live then it'll drop battery voltage to possibly a level below it's own minimum. You could check this by leaving a trickle charger attached.
But this is all a little missing the point, why do you want to monitor the BUS when the car is asleep? Yes, I realise there are some reasons, but would like to hear yours/your deivce?
Have you tried pulling the BUS on to the scope to see things?
Best Richard