Do a loopback test to check that the Tx/Rx functionality is working.
Take a photo showing how things are connected. Provide a link to the datasheet for the sensor.
How do you tell if it is enabled and how to disable it?
I have never heard of a 7k ohm resistance from Bus to load.
I have heard 120-ohm resistance.
I would start with the schematics for your hardware.As for the termination, I do not have any prior experience with Single Wire CAN and my little bit of research suggests that most Single Wire CAN transceivers require a ~7kΩ resistance from BUS to LOAD or in your case CAN_H to GND. It is likely this resistance will get communications going for you.