Pinpoint Test P: The A/C (Air Conditioning) Compressor Relief Valve Discharging
- Normal Operation and Fault Conditions
The A/C pressure relief valve normal open pressure is 3, 447-4, 137 kPa (500-600 psi).
Possible Sources
- High system pressure
- A/C pressure relief valve
- P1 DIAGNOSE THE A/C (AIR CONDITIONING) COMPRESSOR RELIEF VALVE
- Start the engine.
- On the HVAC controls, set the temperature to full cold, select PANEL and select the A/C button (indicator on).
- Using the appropriate manifold gauge set, check the A/C high side system pressure.
Is the high side system pressure above the A/C pressure relief valve open pressure [3, 447-4, 137 kPa (500-600 psi)]?
Yes CARRY OUT the refrigerant system tests. REFER to: Refrigerant System Tests - 2.3L EcoBoost (231kW/314PS)/2.3L EcoBoost (257kW/350PS) - MI4 . REFER to: Refrigerant System Tests - 5.0L 32V Ti-VCT . REFER to: Refrigerant System Tests - 5.2L 32V Ti-VCT - Supercharged . REPAIR the A/C system for a restriction concern found in the refrigerant system tests chart.
No INSTALL a new A/C compressor. REFER to: Air Conditioning (A/C) Compressor - 2.3L EcoBoost (231kW/314PS)/2.3L EcoBoost (257kW/350PS) - MI4 . REFER to: Air Conditioning (A/C) Compressor - 5.0L 32V Ti-VCT . REFER to: Air Conditioning (A/C) Compressor - 5.2L 32V Ti-VCT - Supercharged