Air Conditioning (A/C) Inoperative, A/C Cycles Too Often, Insufficient Cooling, DTC P0530 (Replace A/C High Pressure Valve on Mitsubishi Compressors Only)

Some customers may comment that the A/C is inoperative, the A/C system cycles too often, and/or cooling is insufficient. DTC P0530 may be set.

Diagnose and repair the A/C system following the service procedure below:

1. Leak test the A/C system. Refer to Leak Testing SI Document ID #762998.
2. Inspect the A/C high pressure valve for leaks located on the A/C compressor . If the A/C high pressure valve is the source of the leak, continue with the next step. If the A/C high pressure valve is not the source of the leak, refer to Diagnostic Starting Point - Heating, Ventilation and Air Conditioning SI Document ID #663892.
3. Recover the refrigerant from the system. Refer to Refrigerant Recovery and Recharging SI Document ID #820665.
4. Remove the A/C high pressure valve from the compressor and discard.
5. Replace the A/C high pressure valve, P/N 10337355.

Tighten
Tighten the a/c high pressure valve to 12 N·m(9 ft lbs)

6. Vacuum and recharge the A/C system. Refer to Refrigerant Recovery and Recharging SI Document ID #820665.
7. Plug in a scan tool and check for DTC P0530. If DTC P0530 is set, use the scan tool to clear the DTC. Operate the vehicle within the Conditions for Running the DTC -- refer to DTC P0530 SI Document ID #759618. If P0530 resets, run the diagnostic.

Parts are are expected to be available from GMSPO on Jan. 6, 2003.

For vehicles repaired under warranty, use: