My girlfriend is having a similar AC problem on her 2004 Lexus where it turns on, then shuts off. Now in our case, the AC pump does cycle on/off which I believe is normal to keep the system on a regulated pressure level. Each time the AC pump cycles, the fans kick on. However, the cooling fans will not continue once the AC pump shuts off at MAX AC. I believe the fans should be running all the time during max cold...correct? The AC radiator feels hot, so there is definitely refridgerant compression taking place. Also, the fans turn on whenever the engine needs cooling. I did some internet searching and found there is a TSB 00203 related to "loss of AC performance" which sounds like our deal. Anyone know if this TSB replaces a sensor, cooling fan computer, or something else?
Of course Lexus wants to charge us $100 to diagnose, probably another $400 for the part and then some bend over labor charges.
