Tis the season for ABS faults apparently. I have the same fault on my WABCO D type.
I measured my sensor resistances and they are pretty much the same as yours - around 0.95kOhms.
I think the Nanocom/ECU only displays the faults after they've occurred a few times. I cleared the fault with the Nanocom then cycled the ignition. Even though the dash was saying "ABS Fault" and "Traction Fault" no faults were reported by the Nanocom. After a couple of ignition cycles the fault reappeared on the Nanocom.
My next step was going to be getting another ECU. I know Marty repairs them but they are showing as out of stock so I need to contact him to see what the timescales would be like.