Initial Inspection and Diagnostic Overview

Possible refrigerant system problems can be located by checking the refrigerant pressure.

Checking Refrigerant Pressure





1. Close the front windows.
2. Install the manifold gauge set.
3. Start the engine and run it at 1,500 rpm.
4. Turn the A/C switch on and set the fan switch to the forth position.
5. Press the REC switch and VENT switch on.
6. Set the temperature control lever to MAX COLD.
7. Verify that the pressure readings of the manifold gauge are in the shaded zones.
8. If the pressures are not as specified, refer to the above table and repair the system.
9. If the pressures are normal, inspect the control system.