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International Automotive Technicians Network
Re: Testing High Speed CAN Bus
Posted to Technical Discussion Forum on 1/18/2020

the 123 ohm resistance measurement depicted in the photo is bad (mmkay).

Ideally you want to see close to 60 ohms. The GMLAN system uses two 120Ohm terminating resistors, whos combined total resistance will give you a 60ohm reading with the circuit "asleep."... Login to read more.