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Air Conditioner Error with P110F Code Repair for BMW F15

THE BMW F15 air conditioner can not work, and the dashboard shows a temperature of 50+℃, a high frequency of non-cooling working.

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Trouble Code:
P110F: Ambient Air Temperature Sensor Faulty CAN Signal

 Possible Causes:

  • Faulty Ambient Air Temperature Sensor
  • The Ambient Air Temperature Sensor harness is open or shorted
  • The Ambient Air Temperature Sensor circuit poor electrical connection

Diagnostics and analysis:

  1. Use the multimeter to measure the related wire diagram, work!
  2. Disconnect the dashboard connector to measure resistance 3.5K, it is normal
  3. Both 1 and 2 measurements indicate the dashboard is damaged and can not work well

Solution:

  1. Remove the dashboard, and check the PCB
  2. There are two places corroded by water
  3. Resolder the places that corroded
  4. Solved!
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