Unexplained intermittent CAN / 2CAN Jaguar problems at GSR

[techhelpbb]

Originally Posted by jhersh

Are you certain you aren't tripping a breaker or browning out the Jaguars under high load (due to poor wiring to the power input terminals of the Jaguar)? What you described are all symptoms of the Jag rebooting.

-Joe

I can be certain we didn't blow any fuses or trip any breaker.

It's possible, I suppose that the load is too great and we are somehow browning out, we did consider that and try fresh batteries.

We don't seem to be consistently dragging down the batteries which would loosely indicate we aren't being overly aggressive in a general sense.

I can certainly try putting a datalogger on the power supply side of the Jaguar and see what I can like that. Not sure I have a current probe I can use in that configuration on 12VDC and a shunt is not a good idea given the load impedance.

The wires are clearly of sufficient gauge...I didn't wire that part of the system but it's better than 12AWG (so it's not 12AWG), and the problem doesn't seem to follow any particular wire so it's not likely the crimps. We've crimped plenty of other wires in the past with these tools and this make and brand of lug and they are firmly screwed down.

I could try putting a large 25V or 50V capacitor near the Jaguar on the input side to provide additional low internal resistance power if somehow the impedance of the wires from the power distribution board was suspect. It may not be legal on the competition floor, but for troubleshooting I think the battery will handle that.