Step 1 - Preliminary Checks

The procedures in the following charts will help you diagnose V5 compressor and VDOT refrigerant system problems causing insufficient cooling. A experienced technician must be used in conjunction with other appropriate service manual information.

The V5 compressor is a variable displacement compressor which matches air conditioning demand by changing it's stroke, instead of cycling it's clutch. A control valve located in the rear head of the compressor senses compressor low side pressure and causes the compressor mechanism to stroke. Because the V5 compressor always runs and the system does not cycle. These diagnostic procedures differ from those used for fixed displacement systems. By using these procedures, you will avoid needlessly replacing A/C components.

Step 1-Preliminary Checks

^ Repair the following as necessary. If discharge air temperature with A/C ON is normal after making the following repairs, the system is operating properly.
^ A/C fuse.
^ A/C blower operation.
^ Clutch coil and rear head switches connections.
^ Drive belt. Adjust or replace if damaged or missing.
^ Operation of electric cooling fans.
^ Condenser - Check for restricted air flow.
^ Dealer Technical Bulletins and service guide for updates on A/C System.