I just got a 2001 honda accord lx sedan 4 cylinder. The AC isnt working. I checked all the fuses and relays there all working. I jumped the AC condenser & the clutch engages. The last thing i checked was the pressure on the low side ac line, theres no pressure when the car is on or off. Could that be causing my AC condenser to not engage?

 

Not sure on the 2001 Accord but on OBD1 ECUs (92-95) there is a circuit dedicated to the A/C. Try swapping the ECU...