Looking for the wiring diagram for 2018 F150 manual climate control cabin air temperature sensor. Trying to clear an FCIM code B105A, cabin temp sensor fan open or short. System worked normally with 4 inch screen, code came after installing the 8 inch screen & FCIM. Changing back to the 4 inch screen & FCIM clears the code.

Need to figure out if there is a problem inside the 8" FCIM. System is programmed for single control manual climate control.

thanks

 

Are you sure that you got that error name right? "Cabin temp sensor fan" doesn't sound right, I think it's either fan or sensor but not both.

 

This is a problem with the fan in the cabin air temperature sensor assembly-

Code:B105A:14Definition:Cabin Temperature Sensor Fan: Circuit Short To Ground or OpenCause:This DTC sets when the module senses no voltage on the in-vehicle temperature and humidity sensor fan motor circuit, indicating an open or a short directly to ground. The in-vehicle temperature and humidity sensor fan motor is active.Failure Type: Circuit Short To Ground or OpenThis sub type is used for failures, where the condition detected by the control module is the same for either indicated failure mode.

 

Check your PM, I sent you the wiring diagrams for the entire manual climate control system. Hopefully it has what you're looking for

 

thanks for the schematics! It appears the problem is lack of power from the BCM