5 ms·
Genuine question - why do headlights need to be on the main CAN bus? Could they not be operated from somewhere closer to the ECU by wires that just carry power
by arjvik 3y ago
Genuine question - why do headlights need to be on the main CAN bus? Could they not be operated from somewhere closer to the ECU by wires that just carry power and maybe some very simple data lines?
- sleepybrett 3y agoIt may be something as stupid as a wiring harness layout optimization. You can put the headlights controller at the headlights and only run a single set of CAN bus wires (which are probably in that area anyways), haven't played with CAN I assume they are fairly few and fairly thing gauge, through the firewall of the car.
- maxerickson 3y agoCAN is a 2 wire serial bus using differential signaling. So a couple small wires and maybe some shielding.
- aosmith 3y agoIt's not about the cost of wire, it's about the cost of software. This is the auto industry version of MCAS. I wish I was joking.
- ndesaulniers 3y agoI suspect fancier headlights can pivot based on incline and steering wheel angle.
- EasyMark 3y agoIt cuts way down on the amount and expense of wiring, copper is expensive. It makes it easier to pocket some more profit.
- ranger_danger 3y agojust wait until wireless CAN comes around
- EasyMark 3y agoI can see fiberoptics, but wireless just wouldn't be reliable. There are too many sources of noise in a car, plus rush hour traffic with dozens (hundreds?) of cars nearby broadcasting on similar frequencies.
- aosmith 3y agoA lot of headlights steer with the car, the can bus is a giant network without any authentication.