Refrigerant Charge Check

1. Install the manifold gauge set.
2. Check the refrigerant pressure reading with the engine stopped.

3. Verify that the high - and low - pressure side readings of the manifold gauge are at 493 - 788 kPa {5.02 - 8.04 kgf/sq.cm 72 - 114 psi}
- If the pressure readings are lower than specified, recharge the refrigerant amount.
- If the pressure readings are within the specification but there is insufficient cooling, go to the next step.
- If the pressure readings are within the specification and there are no leaks, the refrigerant amount is OK.

4. Start the engine and run it at a constant 2000 rpm.
5. Turn the A/C switch on and set the fan switch at 4th.




6. Set the REC/FRESH lever to REC.
- If the A/C compressor is short-cycling, note the low-pressure side reading at which the magnetic clutch kicks out.
- If the pressure is 167 kPa {1.7 kgf/sq.cm, 24 psi} or lower, evacuate then recharge the refrigerant system with the proper amount of refrigerant.
- If the pressure is 206 kPa (2.1 kgf/sq.cm, 30 psi} or higher, inspect the thermoswitch.