Quote:
Originally Posted by weekend_cruiser
The CAN bus that the OBD devices use to communicate with the vehicle doesn't operate at 12V, it's between 1V-4V. I don't think self-powered OBD devices use the 12V from the port (but could be wrong).
|
Exactly, the communication cables operate with less than 4,5V.
"Terminal 16: Scan tool power, battery positive voltage terminal" In the wiring diagram it also gets powered directly by the 12V battery.
__________________
Callaway SC750 ZL1, DIY 1LE with added OEM 1LE Wheels, DSSV Suspension and 1LE Aero, FEA front control arms, DIY oil cooler, CWA 150 pump, bigger intercooler, Phenolic blower spacer, 82°C thermostat, BMR lockout kit, CTSV Brake Air Deflectors, Smooth idle cam, LS7 lifters, Bronze trunnion bushings. Tuned by JRE
|