FYI: the compressor on your vehicle is a direct drive system, no electrically controlled clutch (always on). The AC system on this vehicle operates by using a PWM (duty cycle controlled) signal to a control valve which alters the crankcase pressure inside the AC compressor. The altering of this pressure allows the variable displacement compressor to deliver refrigerant from a minimum of 10% (short cylinder stroke) to a maximum of 100% (long cylinder stroke). When crankcase pressure decreases (low pressure on one side of the pistons) the compressor increases the output volume (Large pressure differential between Hi/Low). When the crankcase pressure is increased (near equal pressure on both sides of the pistons) the volume is decreased (Small pressure differential between Hi/low).

Sort of like taking your hands and making two fists, place them knuckle to knuckle and begin pushing. If both hands push with equal force your hands hardly move, reduce the force applied by one hand and the other hand begins to move away from the starting point.

Enough about science already how do we fix your car! If you insist on trying to solve the problem your self try revving the engine up to about 2200 to 2500 and see if you can get the AC to accept more refrigerant. I would strongly encourage you to find a facility in your area that has the AC equipment so it can be serviced with the exact amount required for optimal performance.


Always