G4X CAN 2 Connector +14V supply - how much max current?

[mike2016]

I just realized there's +14V on the CAN2 connector.

Can this be used to power CAN Lambda? 

what's the max allowed power draw for this connector?

 

[Adamw]

It was originally done to power a CAN device like a display or EGT amp etc.  The PCB tracks arent huge and it isnt over current protected or fused.  I wouldnt  put more than say 2A through it.  It would be Ok for most of our CAN devices except the CAN lambda.  On our newer plug-ins with the 4 pin CAN port these are capable of about 3A continuous and have a self reset-able fuse, these newer ones can do a CAN lambda directly.    

[mike2016]

Got it. I'll power the CAN bus from a ECU power supply. 

But even with newer ones capable of 3A, the lambda sensor heater calls for 8A ? 

[Adamw]

Newer ones do 3A continuous and quite a bit more for a short time.  The lambda generally only pulls high current at cold start then settles down to about 1.5A for normal operation.