Ran into an issue with the ambient air temperature sensor today doing some troubleshooting.
For grins I changed the ambient temperature sensor location to "CBC" (alpha indicated the current value was "DCM"). As expected, I lost the temperature display on the dash, it went to -40F, and a P0070 code was set for "ambient air temperature sensor circuit short circuit to + battery / open circuit"
I then changed the location back to DCM and the code would not go away, nor could I get temp to display on the IP (still displaying -40F, and setting the MIL). Battery pulls, key cycles, nothing.
When I reviewed the BCM log file it said "Ambient air temperature sensor location: Not defined", which made me think the setting didn't take. I went back to my original log file before anything was altered with Alpha, and it listed the same thing. If I set the location to CBC, it will display as such in the log file, but not when setting to DCM. This makes me wonder if there's another setting that Apha isn't seeing?
Any thoughts? Curious what some of your BCM's are displaying for ambient temp sensor location?