Well since a year ago to here my honda pilot 2003 stopped working air conditioning. eh tried everything that indicates the repair manual with what is the subject check fuse and relays the thing is that all my conclusion blames the ecu for not sending me ground signal on pin 17 of the ECU. I also checked pin 27 the blue-red that comes from the climate control to the pressure sensor that makes it cut the signal sends 12v.

Finally I uncovered the ECU and checked the transistors in the array on pin 17.
STA415A and everything seems to be ok.
The truth is very frustrating not to be able to reach the solution of the air conditioning.
this is the ecu itself


the sta415a transistor