I ended up extending and soldering 2 pins from the ibc cable. Thankfully, I still have my old desktop in storage so I was able to pull the ibc from the hard drive. Anyhow, after putting back the climate unit and checking Carly, a few CAN faults are gone. However, the AC CAN is still there. So therefore, I will be checking the rear climate unit too as it seems to be acting funny. I'll need to check all the wires under the center console to rule out a short, but I'm actually hoping to find one. Hope this will solve the mystery.